113 files changed, 1338 insertions, 899 deletions

diff --git a/server/controllers/activitypub/inbox.ts b/server/controllers/activitypub/inbox.ts
index 8b42478ee..67b2c0d66 100644
--- a/server/controllers/activitypub/inbox.ts
+++ b/server/controllers/activitypub/inbox.ts
@@ -7,6 +7,7 @@ import { asyncMiddleware, checkSignature, localAccountValidator, localVideoChann
 import { activityPubValidator } from '../../middlewares/validators/activitypub/activity'
 import { queue } from 'async'
 import { MActorDefault, MActorSignature } from '../../types/models'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const inboxRouter = express.Router()
 
@@ -79,5 +80,5 @@ function inboxController (req: express.Request, res: express.Response) {
     inboxActor: accountOrChannel ? accountOrChannel.Actor : undefined
   })
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
diff --git a/server/controllers/api/abuse.ts b/server/controllers/api/abuse.ts
index 25d6e2ab0..0ab74bdff 100644
--- a/server/controllers/api/abuse.ts
+++ b/server/controllers/api/abuse.ts
@@ -6,6 +6,7 @@ import { AbuseModel } from '@server/models/abuse/abuse'
 import { AbuseMessageModel } from '@server/models/abuse/abuse-message'
 import { getServerActor } from '@server/models/application/application'
 import { abusePredefinedReasonsMap } from '@shared/core-utils/abuse'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 import { AbuseCreate, AbuseState, UserRight } from '../../../shared'
 import { getFormattedObjects } from '../../helpers/utils'
 import { sequelizeTypescript } from '../../initializers/database'
@@ -141,7 +142,7 @@ async function updateAbuse (req: express.Request, res: express.Response) {
 
   // Do not send the delete to other instances, we updated OUR copy of this abuse
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function deleteAbuse (req: express.Request, res: express.Response) {
@@ -153,7 +154,7 @@ async function deleteAbuse (req: express.Request, res: express.Response) {
 
   // Do not send the delete to other instances, we delete OUR copy of this abuse
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function reportAbuse (req: express.Request, res: express.Response) {
@@ -243,5 +244,5 @@ async function deleteAbuseMessage (req: express.Request, res: express.Response)
     return abuseMessage.destroy({ transaction: t })
   })
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
diff --git a/server/controllers/api/bulk.ts b/server/controllers/api/bulk.ts
index 1fe139c92..649351029 100644
--- a/server/controllers/api/bulk.ts
+++ b/server/controllers/api/bulk.ts
@@ -2,8 +2,9 @@ import * as express from 'express'
 import { asyncMiddleware, authenticate } from '../../middlewares'
 import { bulkRemoveCommentsOfValidator } from '@server/middlewares/validators/bulk'
 import { VideoCommentModel } from '@server/models/video/video-comment'
-import { BulkRemoveCommentsOfBody } from '@shared/models/bulk/bulk-remove-comments-of-body.model'
 import { removeComment } from '@server/lib/video-comment'
+import { BulkRemoveCommentsOfBody } from '@shared/models/bulk/bulk-remove-comments-of-body.model'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const bulkRouter = express.Router()
 
@@ -33,7 +34,7 @@ async function bulkRemoveCommentsOf (req: express.Request, res: express.Response
   const comments = await VideoCommentModel.listForBulkDelete(account, filter)
 
   // Don't wait result
-  res.sendStatus(204)
+  res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 
   for (const comment of comments) {
     await removeComment(comment)
diff --git a/server/controllers/api/index.ts b/server/controllers/api/index.ts
index eda9e04d1..7ade1df3a 100644
--- a/server/controllers/api/index.ts
+++ b/server/controllers/api/index.ts
@@ -1,6 +1,7 @@
 import * as cors from 'cors'
 import * as express from 'express'
 import * as RateLimit from 'express-rate-limit'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 import { badRequest } from '../../helpers/express-utils'
 import { CONFIG } from '../../initializers/config'
 import { abuseRouter } from './abuse'
@@ -56,5 +57,5 @@ export { apiRouter }
 // ---------------------------------------------------------------------------
 
 function pong (req: express.Request, res: express.Response) {
-  return res.send('pong').status(200).end()
+  return res.send('pong').status(HttpStatusCode.OK_200).end()
 }
diff --git a/server/controllers/api/oauth-clients.ts b/server/controllers/api/oauth-clients.ts
index b2de8bcf5..c21e2298d 100644
--- a/server/controllers/api/oauth-clients.ts
+++ b/server/controllers/api/oauth-clients.ts
@@ -1,5 +1,6 @@
 import * as express from 'express'
 import { OAuthClientLocal } from '../../../shared'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 import { logger } from '../../helpers/logger'
 import { CONFIG } from '../../initializers/config'
 import { asyncMiddleware } from '../../middlewares'
@@ -23,7 +24,7 @@ async function getLocalClient (req: express.Request, res: express.Response, next
   // Don't make this check if this is a test instance
   if (process.env.NODE_ENV !== 'test' && req.get('host') !== headerHostShouldBe) {
     logger.info('Getting client tokens for host %s is forbidden (expected %s).', req.get('host'), headerHostShouldBe)
-    return res.type('json').status(403).end()
+    return res.type('json').status(HttpStatusCode.FORBIDDEN_403).end()
   }
 
   const client = await OAuthClientModel.loadFirstClient()
diff --git a/server/controllers/api/plugins.ts b/server/controllers/api/plugins.ts
index f8a0d19ca..1c0b5edb1 100644
--- a/server/controllers/api/plugins.ts
+++ b/server/controllers/api/plugins.ts
@@ -27,6 +27,7 @@ import { listAvailablePluginsFromIndex } from '../../lib/plugins/plugin-index'
 import { PeertubePluginIndexList } from '../../../shared/models/plugins/peertube-plugin-index-list.model'
 import { RegisteredServerSettings } from '../../../shared/models/plugins/register-server-setting.model'
 import { PublicServerSetting } from '../../../shared/models/plugins/public-server.setting'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const pluginRouter = express.Router()
 
@@ -140,7 +141,7 @@ async function installPlugin (req: express.Request, res: express.Response) {
     return res.json(plugin.toFormattedJSON())
   } catch (err) {
     logger.warn('Cannot install plugin %s.', toInstall, { err })
-    return res.sendStatus(400)
+    return res.sendStatus(HttpStatusCode.BAD_REQUEST_400)
   }
 }
 
@@ -155,7 +156,7 @@ async function updatePlugin (req: express.Request, res: express.Response) {
     return res.json(plugin.toFormattedJSON())
   } catch (err) {
     logger.warn('Cannot update plugin %s.', toUpdate, { err })
-    return res.sendStatus(400)
+    return res.sendStatus(HttpStatusCode.BAD_REQUEST_400)
   }
 }
 
@@ -164,7 +165,7 @@ async function uninstallPlugin (req: express.Request, res: express.Response) {
 
   await PluginManager.Instance.uninstall(body.npmName)
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 function getPublicPluginSettings (req: express.Request, res: express.Response) {
@@ -193,7 +194,7 @@ async function updatePluginSettings (req: express.Request, res: express.Response
 
   await PluginManager.Instance.onSettingsChanged(plugin.name, plugin.settings)
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function listAvailablePlugins (req: express.Request, res: express.Response) {
@@ -202,7 +203,7 @@ async function listAvailablePlugins (req: express.Request, res: express.Response
   const resultList = await listAvailablePluginsFromIndex(query)
 
   if (!resultList) {
-    return res.status(503)
+    return res.status(HttpStatusCode.SERVICE_UNAVAILABLE_503)
       .json({ error: 'Plugin index unavailable. Please retry later' })
       .end()
   }
diff --git a/server/controllers/api/search.ts b/server/controllers/api/search.ts
index 6e2d11d93..353fd171b 100644
--- a/server/controllers/api/search.ts
+++ b/server/controllers/api/search.ts
@@ -6,6 +6,7 @@ import { getOrCreateVideoAndAccountAndChannel } from '@server/lib/activitypub/vi
 import { AccountBlocklistModel } from '@server/models/account/account-blocklist'
 import { getServerActor } from '@server/models/application/application'
 import { ServerBlocklistModel } from '@server/models/server/server-blocklist'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 import { ResultList, Video, VideoChannel } from '@shared/models'
 import { SearchTargetQuery } from '@shared/models/search/search-target-query.model'
 import { VideoChannelsSearchQuery, VideosSearchQuery } from '../../../shared/models/search'
@@ -99,7 +100,7 @@ async function searchVideoChannelsIndex (query: VideoChannelsSearchQuery, res: e
   } catch (err) {
     logger.warn('Cannot use search index to make video channels search.', { err })
 
-    return res.sendStatus(500)
+    return res.sendStatus(HttpStatusCode.INTERNAL_SERVER_ERROR_500)
   }
 }
 
@@ -191,7 +192,7 @@ async function searchVideosIndex (query: VideosSearchQuery, res: express.Respons
   } catch (err) {
     logger.warn('Cannot use search index to make video search.', { err })
 
-    return res.sendStatus(500)
+    return res.sendStatus(HttpStatusCode.INTERNAL_SERVER_ERROR_500)
   }
 }
 
diff --git a/server/controllers/api/server/contact.ts b/server/controllers/api/server/contact.ts
index de02ffc0b..caddc0909 100644
--- a/server/controllers/api/server/contact.ts
+++ b/server/controllers/api/server/contact.ts
@@ -3,6 +3,7 @@ import { asyncMiddleware, contactAdministratorValidator } from '../../../middlew
 import { Redis } from '../../../lib/redis'
 import { Emailer } from '../../../lib/emailer'
 import { ContactForm } from '../../../../shared/models/server'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const contactRouter = express.Router()
 
@@ -18,7 +19,7 @@ async function contactAdministrator (req: express.Request, res: express.Response
 
   await Redis.Instance.setContactFormIp(req.ip)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/controllers/api/server/follows.ts b/server/controllers/api/server/follows.ts
index 517d1897e..80025bc5b 100644
--- a/server/controllers/api/server/follows.ts
+++ b/server/controllers/api/server/follows.ts
@@ -28,6 +28,7 @@ import { removeRedundanciesOfServer } from '../../../lib/redundancy'
 import { sequelizeTypescript } from '../../../initializers/database'
 import { autoFollowBackIfNeeded } from '../../../lib/activitypub/follow'
 import { getServerActor } from '@server/models/application/application'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const serverFollowsRouter = express.Router()
 serverFollowsRouter.get('/following',
@@ -138,7 +139,7 @@ async function followInstance (req: express.Request, res: express.Response) {
     JobQueue.Instance.createJob({ type: 'activitypub-follow', payload })
   }
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function removeFollowing (req: express.Request, res: express.Response) {
@@ -159,7 +160,7 @@ async function removeFollowing (req: express.Request, res: express.Response) {
     await follow.destroy({ transaction: t })
   })
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function removeOrRejectFollower (req: express.Request, res: express.Response) {
@@ -169,7 +170,7 @@ async function removeOrRejectFollower (req: express.Request, res: express.Respon
 
   await follow.destroy()
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function acceptFollower (req: express.Request, res: express.Response) {
@@ -182,5 +183,5 @@ async function acceptFollower (req: express.Request, res: express.Response) {
 
   await autoFollowBackIfNeeded(follow)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
diff --git a/server/controllers/api/server/redundancy.ts b/server/controllers/api/server/redundancy.ts
index 1ced0759e..7c13dc21b 100644
--- a/server/controllers/api/server/redundancy.ts
+++ b/server/controllers/api/server/redundancy.ts
@@ -19,6 +19,7 @@ import { removeRedundanciesOfServer, removeVideoRedundancy } from '../../../lib/
 import { logger } from '../../../helpers/logger'
 import { VideoRedundancyModel } from '@server/models/redundancy/video-redundancy'
 import { JobQueue } from '@server/lib/job-queue'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const serverRedundancyRouter = express.Router()
 
@@ -89,13 +90,13 @@ async function addVideoRedundancy (req: express.Request, res: express.Response)
     payload
   })
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function removeVideoRedundancyController (req: express.Request, res: express.Response) {
   await removeVideoRedundancy(res.locals.videoRedundancy)
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function updateRedundancy (req: express.Request, res: express.Response) {
@@ -109,5 +110,5 @@ async function updateRedundancy (req: express.Request, res: express.Response) {
   removeRedundanciesOfServer(server.id)
     .catch(err => logger.error('Cannot remove redundancy of %s.', server.host, { err }))
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
diff --git a/server/controllers/api/server/server-blocklist.ts b/server/controllers/api/server/server-blocklist.ts
index 78e8a7e09..6e341c0fb 100644
--- a/server/controllers/api/server/server-blocklist.ts
+++ b/server/controllers/api/server/server-blocklist.ts
@@ -25,6 +25,7 @@ import {
 } from '../../../middlewares/validators'
 import { AccountBlocklistModel } from '../../../models/account/account-blocklist'
 import { ServerBlocklistModel } from '../../../models/server/server-blocklist'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const serverBlocklistRouter = express.Router()
 
@@ -108,7 +109,7 @@ async function blockAccount (req: express.Request, res: express.Response) {
     forUserId: null // For all users
   }).catch(err => logger.error('Cannot remove notifications after an account mute.', { err }))
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function unblockAccount (req: express.Request, res: express.Response) {
@@ -116,7 +117,7 @@ async function unblockAccount (req: express.Request, res: express.Response) {
 
   await removeAccountFromBlocklist(accountBlock)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function listBlockedServers (req: express.Request, res: express.Response) {
@@ -145,7 +146,7 @@ async function blockServer (req: express.Request, res: express.Response) {
     forUserId: null // For all users
   }).catch(err => logger.error('Cannot remove notifications after a server mute.', { err }))
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function unblockServer (req: express.Request, res: express.Response) {
@@ -153,5 +154,5 @@ async function unblockServer (req: express.Request, res: express.Response) {
 
   await removeServerFromBlocklist(serverBlock)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
diff --git a/server/controllers/api/users/index.ts b/server/controllers/api/users/index.ts
index 5b113feac..d743a9912 100644
--- a/server/controllers/api/users/index.ts
+++ b/server/controllers/api/users/index.ts
@@ -52,6 +52,7 @@ import { myVideosHistoryRouter } from './my-history'
 import { myNotificationsRouter } from './my-notifications'
 import { mySubscriptionsRouter } from './my-subscriptions'
 import { myVideoPlaylistsRouter } from './my-video-playlists'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const auditLogger = auditLoggerFactory('users')
 
@@ -255,7 +256,7 @@ async function registerUser (req: express.Request, res: express.Response) {
 
   Hooks.runAction('action:api.user.registered', { body, user, account, videoChannel })
 
-  return res.type('json').status(204).end()
+  return res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function unblockUser (req: express.Request, res: express.Response) {
@@ -265,7 +266,7 @@ async function unblockUser (req: express.Request, res: express.Response) {
 
   Hooks.runAction('action:api.user.unblocked', { user })
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function blockUser (req: express.Request, res: express.Response) {
@@ -276,7 +277,7 @@ async function blockUser (req: express.Request, res: express.Response) {
 
   Hooks.runAction('action:api.user.blocked', { user })
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 function getUser (req: express.Request, res: express.Response) {
@@ -310,7 +311,7 @@ async function removeUser (req: express.Request, res: express.Response) {
 
   Hooks.runAction('action:api.user.deleted', { user })
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function updateUser (req: express.Request, res: express.Response) {
@@ -338,7 +339,7 @@ async function updateUser (req: express.Request, res: express.Response) {
 
   // Don't need to send this update to followers, these attributes are not federated
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function askResetUserPassword (req: express.Request, res: express.Response) {
@@ -348,7 +349,7 @@ async function askResetUserPassword (req: express.Request, res: express.Response
   const url = WEBSERVER.URL + '/reset-password?userId=' + user.id + '&verificationString=' + verificationString
   await Emailer.Instance.addPasswordResetEmailJob(user.username, user.email, url)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function resetUserPassword (req: express.Request, res: express.Response) {
@@ -358,7 +359,7 @@ async function resetUserPassword (req: express.Request, res: express.Response) {
   await user.save()
   await Redis.Instance.removePasswordVerificationString(user.id)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function reSendVerifyUserEmail (req: express.Request, res: express.Response) {
@@ -366,7 +367,7 @@ async function reSendVerifyUserEmail (req: express.Request, res: express.Respons
 
   await sendVerifyUserEmail(user)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function verifyUserEmail (req: express.Request, res: express.Response) {
@@ -380,7 +381,7 @@ async function verifyUserEmail (req: express.Request, res: express.Response) {
 
   await user.save()
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function changeUserBlock (res: express.Response, user: MUserAccountDefault, block: boolean, reason?: string) {
diff --git a/server/controllers/api/users/me.ts b/server/controllers/api/users/me.ts
index b490518fc..3d2a325fe 100644
--- a/server/controllers/api/users/me.ts
+++ b/server/controllers/api/users/me.ts
@@ -28,6 +28,7 @@ import { AccountVideoRateModel } from '../../../models/account/account-video-rat
 import { UserModel } from '../../../models/account/user'
 import { VideoModel } from '../../../models/video/video'
 import { VideoImportModel } from '../../../models/video/video-import'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const reqAvatarFile = createReqFiles([ 'avatarfile' ], MIMETYPES.IMAGE.MIMETYPE_EXT, { avatarfile: CONFIG.STORAGE.TMP_DIR })
 
@@ -162,7 +163,7 @@ async function deleteMe (req: express.Request, res: express.Response) {
 
   await user.destroy()
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function updateMe (req: express.Request, res: express.Response) {
@@ -210,7 +211,7 @@ async function updateMe (req: express.Request, res: express.Response) {
     await sendVerifyUserEmail(user, true)
   }
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function updateMyAvatar (req: express.Request, res: express.Response) {
diff --git a/server/controllers/api/users/my-blocklist.ts b/server/controllers/api/users/my-blocklist.ts
index 6eba22d52..faaef3ac0 100644
--- a/server/controllers/api/users/my-blocklist.ts
+++ b/server/controllers/api/users/my-blocklist.ts
@@ -22,6 +22,7 @@ import { addAccountInBlocklist, addServerInBlocklist, removeAccountFromBlocklist
 import { ServerBlocklistModel } from '../../../models/server/server-blocklist'
 import { UserNotificationModel } from '@server/models/account/user-notification'
 import { logger } from '@server/helpers/logger'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const myBlocklistRouter = express.Router()
 
@@ -99,7 +100,7 @@ async function blockAccount (req: express.Request, res: express.Response) {
     forUserId: user.id
   }).catch(err => logger.error('Cannot remove notifications after an account mute.', { err }))
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function unblockAccount (req: express.Request, res: express.Response) {
@@ -107,7 +108,7 @@ async function unblockAccount (req: express.Request, res: express.Response) {
 
   await removeAccountFromBlocklist(accountBlock)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function listBlockedServers (req: express.Request, res: express.Response) {
@@ -136,7 +137,7 @@ async function blockServer (req: express.Request, res: express.Response) {
     forUserId: user.id
   }).catch(err => logger.error('Cannot remove notifications after a server mute.', { err }))
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function unblockServer (req: express.Request, res: express.Response) {
@@ -144,5 +145,5 @@ async function unblockServer (req: express.Request, res: express.Response) {
 
   await removeServerFromBlocklist(serverBlock)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
diff --git a/server/controllers/api/users/my-history.ts b/server/controllers/api/users/my-history.ts
index dc915977f..80d4dc748 100644
--- a/server/controllers/api/users/my-history.ts
+++ b/server/controllers/api/users/my-history.ts
@@ -10,6 +10,7 @@ import {
 import { getFormattedObjects } from '../../../helpers/utils'
 import { UserVideoHistoryModel } from '../../../models/account/user-video-history'
 import { sequelizeTypescript } from '../../../initializers/database'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const myVideosHistoryRouter = express.Router()
 
@@ -50,5 +51,7 @@ async function removeUserHistory (req: express.Request, res: express.Response) {
     return UserVideoHistoryModel.removeUserHistoryBefore(user, beforeDate, t)
   })
 
-  return res.type('json').status(204).end()
+  return res.type('json')
+            .status(HttpStatusCode.NO_CONTENT_204)
+            .end()
 }
diff --git a/server/controllers/api/users/my-notifications.ts b/server/controllers/api/users/my-notifications.ts
index 050866960..5f5e4c5e6 100644
--- a/server/controllers/api/users/my-notifications.ts
+++ b/server/controllers/api/users/my-notifications.ts
@@ -19,6 +19,7 @@ import {
 } from '../../../middlewares/validators/user-notifications'
 import { UserNotificationSetting } from '../../../../shared/models/users'
 import { UserNotificationSettingModel } from '../../../models/account/user-notification-setting'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const myNotificationsRouter = express.Router()
 
@@ -84,7 +85,7 @@ async function updateNotificationSettings (req: express.Request, res: express.Re
 
   await UserNotificationSettingModel.update(values, query)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function listUserNotifications (req: express.Request, res: express.Response) {
@@ -100,7 +101,7 @@ async function markAsReadUserNotifications (req: express.Request, res: express.R
 
   await UserNotificationModel.markAsRead(user.id, req.body.ids)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function markAsReadAllUserNotifications (req: express.Request, res: express.Response) {
@@ -108,5 +109,5 @@ async function markAsReadAllUserNotifications (req: express.Request, res: expres
 
   await UserNotificationModel.markAllAsRead(user.id)
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
diff --git a/server/controllers/api/users/my-subscriptions.ts b/server/controllers/api/users/my-subscriptions.ts
index 66b33c477..ec77ddd7a 100644
--- a/server/controllers/api/users/my-subscriptions.ts
+++ b/server/controllers/api/users/my-subscriptions.ts
@@ -27,6 +27,7 @@ import {
 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
 import { VideoModel } from '../../../models/video/video'
 import { sendUndoFollow } from '@server/lib/activitypub/send'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const mySubscriptionsRouter = express.Router()
 
@@ -126,7 +127,7 @@ function addUserSubscription (req: express.Request, res: express.Response) {
 
   JobQueue.Instance.createJob({ type: 'activitypub-follow', payload })
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 function getUserSubscription (req: express.Request, res: express.Response) {
@@ -144,7 +145,9 @@ async function deleteUserSubscription (req: express.Request, res: express.Respon
     return subscription.destroy({ transaction: t })
   })
 
-  return res.type('json').status(204).end()
+  return res.type('json')
+            .status(HttpStatusCode.NO_CONTENT_204)
+            .end()
 }
 
 async function getUserSubscriptions (req: express.Request, res: express.Response) {
diff --git a/server/controllers/api/video-channel.ts b/server/controllers/api/video-channel.ts
index 45c936978..5c96950c5 100644
--- a/server/controllers/api/video-channel.ts
+++ b/server/controllers/api/video-channel.ts
@@ -38,6 +38,7 @@ import { AccountModel } from '../../models/account/account'
 import { VideoModel } from '../../models/video/video'
 import { VideoChannelModel } from '../../models/video/video-channel'
 import { VideoPlaylistModel } from '../../models/video/video-playlist'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const auditLogger = auditLoggerFactory('channels')
 const reqAvatarFile = createReqFiles([ 'avatarfile' ], MIMETYPES.IMAGE.MIMETYPE_EXT, { avatarfile: CONFIG.STORAGE.TMP_DIR })
@@ -212,7 +213,7 @@ async function updateVideoChannel (req: express.Request, res: express.Response)
     throw err
   }
 
-  res.type('json').status(204).end()
+  res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 
   // Don't process in a transaction, and after the response because it could be long
   if (doBulkVideoUpdate) {
@@ -232,7 +233,7 @@ async function removeVideoChannel (req: express.Request, res: express.Response)
     logger.info('Video channel %s deleted.', videoChannelInstance.Actor.url)
   })
 
-  return res.type('json').status(204).end()
+  return res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function getVideoChannel (req: express.Request, res: express.Response) {
diff --git a/server/controllers/api/video-playlist.ts b/server/controllers/api/video-playlist.ts
index fb08a63b2..f3dc8b2a9 100644
--- a/server/controllers/api/video-playlist.ts
+++ b/server/controllers/api/video-playlist.ts
@@ -42,6 +42,7 @@ import {
 import { AccountModel } from '../../models/account/account'
 import { VideoPlaylistModel } from '../../models/video/video-playlist'
 import { VideoPlaylistElementModel } from '../../models/video/video-playlist-element'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const reqThumbnailFile = createReqFiles([ 'thumbnailfile' ], MIMETYPES.IMAGE.MIMETYPE_EXT, { thumbnailfile: CONFIG.STORAGE.TMP_DIR })
 
@@ -271,7 +272,7 @@ async function updateVideoPlaylist (req: express.Request, res: express.Response)
     throw err
   }
 
-  return res.type('json').status(204).end()
+  return res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function removeVideoPlaylist (req: express.Request, res: express.Response) {
@@ -285,7 +286,7 @@ async function removeVideoPlaylist (req: express.Request, res: express.Response)
     logger.info('Video playlist %s deleted.', videoPlaylistInstance.uuid)
   })
 
-  return res.type('json').status(204).end()
+  return res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function addVideoInPlaylist (req: express.Request, res: express.Response) {
@@ -351,7 +352,7 @@ async function updateVideoPlaylistElement (req: express.Request, res: express.Re
 
   logger.info('Element of position %d of playlist %s updated.', playlistElement.position, videoPlaylist.uuid)
 
-  return res.type('json').status(204).end()
+  return res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function removeVideoFromPlaylist (req: express.Request, res: express.Response) {
@@ -379,7 +380,7 @@ async function removeVideoFromPlaylist (req: express.Request, res: express.Respo
   sendUpdateVideoPlaylist(videoPlaylist, undefined)
     .catch(err => logger.error('Cannot send video playlist update.', { err }))
 
-  return res.type('json').status(204).end()
+  return res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function reorderVideosPlaylist (req: express.Request, res: express.Response) {
@@ -391,7 +392,7 @@ async function reorderVideosPlaylist (req: express.Request, res: express.Respons
   const reorderLength: number = body.reorderLength || 1
 
   if (start === insertAfter) {
-    return res.status(204).end()
+    return res.status(HttpStatusCode.NO_CONTENT_204).end()
   }
 
   // Example: if we reorder position 2 and insert after position 5 (so at position 6): # 1 2 3 4 5 6 7 8 9
@@ -432,7 +433,7 @@ async function reorderVideosPlaylist (req: express.Request, res: express.Respons
     videoPlaylist.uuid, insertAfter, start, start + reorderLength - 1
   )
 
-  return res.type('json').status(204).end()
+  return res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function getVideoPlaylistVideos (req: express.Request, res: express.Response) {
diff --git a/server/controllers/api/videos/blacklist.ts b/server/controllers/api/videos/blacklist.ts
index 3b25ceea2..fa8448c86 100644
--- a/server/controllers/api/videos/blacklist.ts
+++ b/server/controllers/api/videos/blacklist.ts
@@ -18,6 +18,7 @@ import {
   videosBlacklistUpdateValidator
 } from '../../../middlewares'
 import { VideoBlacklistModel } from '../../../models/video/video-blacklist'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const blacklistRouter = express.Router()
 
@@ -69,7 +70,7 @@ async function addVideoToBlacklistController (req: express.Request, res: express
 
   logger.info('Video %s blacklisted.', videoInstance.uuid)
 
-  return res.type('json').sendStatus(204)
+  return res.type('json').sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function updateVideoBlacklistController (req: express.Request, res: express.Response) {
@@ -81,7 +82,7 @@ async function updateVideoBlacklistController (req: express.Request, res: expres
     return videoBlacklist.save({ transaction: t })
   })
 
-  return res.type('json').sendStatus(204)
+  return res.type('json').sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function listBlacklist (req: express.Request, res: express.Response) {
@@ -104,5 +105,5 @@ async function removeVideoFromBlacklistController (req: express.Request, res: ex
 
   logger.info('Video %s removed from blacklist.', video.uuid)
 
-  return res.type('json').sendStatus(204)
+  return res.type('json').sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
diff --git a/server/controllers/api/videos/captions.ts b/server/controllers/api/videos/captions.ts
index c4e2ee72c..bf82e2c19 100644
--- a/server/controllers/api/videos/captions.ts
+++ b/server/controllers/api/videos/captions.ts
@@ -11,6 +11,7 @@ import { moveAndProcessCaptionFile } from '../../../helpers/captions-utils'
 import { CONFIG } from '../../../initializers/config'
 import { sequelizeTypescript } from '../../../initializers/database'
 import { MVideoCaptionVideo } from '@server/types/models'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const reqVideoCaptionAdd = createReqFiles(
   [ 'captionfile' ],
@@ -72,7 +73,7 @@ async function addVideoCaption (req: express.Request, res: express.Response) {
     await federateVideoIfNeeded(video, false, t)
   })
 
-  return res.status(204).end()
+  return res.status(HttpStatusCode.NO_CONTENT_204).end()
 }
 
 async function deleteVideoCaption (req: express.Request, res: express.Response) {
@@ -88,5 +89,5 @@ async function deleteVideoCaption (req: express.Request, res: express.Response)
 
   logger.info('Video caption %s of video %s deleted.', videoCaption.language, video.uuid)
 
-  return res.type('json').status(204).end()
+  return res.type('json').status(HttpStatusCode.NO_CONTENT_204).end()
 }
diff --git a/server/controllers/api/videos/comment.ts b/server/controllers/api/videos/comment.ts
index 020d0b104..752a33596 100644
--- a/server/controllers/api/videos/comment.ts
+++ b/server/controllers/api/videos/comment.ts
@@ -29,6 +29,7 @@ import {
 } from '../../../middlewares/validators'
 import { AccountModel } from '../../../models/account/account'
 import { VideoCommentModel } from '../../../models/video/video-comment'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const auditLogger = auditLoggerFactory('comments')
 const videoCommentRouter = express.Router()
@@ -161,7 +162,7 @@ async function listVideoThreadComments (req: express.Request, res: express.Respo
   }
 
   if (resultList.data.length === 0) {
-    return res.sendStatus(404)
+    return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
   }
 
   return res.json(buildFormattedCommentTree(resultList))
@@ -218,5 +219,7 @@ async function removeVideoComment (req: express.Request, res: express.Response)
 
   auditLogger.delete(getAuditIdFromRes(res), new CommentAuditView(videoCommentInstance.toFormattedJSON()))
 
-  return res.type('json').status(204).end()
+  return res.type('json')
+            .status(HttpStatusCode.NO_CONTENT_204)
+            .end()
 }
diff --git a/server/controllers/api/videos/import.ts b/server/controllers/api/videos/import.ts
index bc5fea7aa..cd9ba046d 100644
--- a/server/controllers/api/videos/import.ts
+++ b/server/controllers/api/videos/import.ts
@@ -36,6 +36,7 @@ import { asyncMiddleware, asyncRetryTransactionMiddleware, authenticate, videoIm
 import { VideoModel } from '../../../models/video/video'
 import { VideoCaptionModel } from '../../../models/video/video-caption'
 import { VideoImportModel } from '../../../models/video/video-import'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const auditLogger = auditLoggerFactory('video-imports')
 const videoImportsRouter = express.Router()
@@ -146,7 +147,7 @@ async function addYoutubeDLImport (req: express.Request, res: express.Response)
   } catch (err) {
     logger.info('Cannot fetch information from import for URL %s.', targetUrl, { err })
 
-    return res.status(400).json({
+    return res.status(HttpStatusCode.BAD_REQUEST_400).json({
       error: 'Cannot fetch remote information of this URL.'
     }).end()
   }
diff --git a/server/controllers/api/videos/index.ts b/server/controllers/api/videos/index.ts
index 71a0f97e2..e1c775180 100644
--- a/server/controllers/api/videos/index.ts
+++ b/server/controllers/api/videos/index.ts
@@ -66,6 +66,7 @@ import { liveRouter } from './live'
 import { ownershipVideoRouter } from './ownership'
 import { rateVideoRouter } from './rate'
 import { watchingRouter } from './watching'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const auditLogger = auditLoggerFactory('videos')
 const videosRouter = express.Router()
@@ -178,7 +179,7 @@ async function addVideo (req: express.Request, res: express.Response) {
   // Set timeout to 10 minutes, as Express's default is 2 minutes
   req.setTimeout(1000 * 60 * 10, () => {
     logger.error('Upload video has timed out.')
-    return res.sendStatus(408)
+    return res.sendStatus(HttpStatusCode.REQUEST_TIMEOUT_408)
   })
 
   const videoPhysicalFile = req.files['videofile'][0]
@@ -394,7 +395,9 @@ async function updateVideo (req: express.Request, res: express.Response) {
     throw err
   }
 
-  return res.type('json').status(204).end()
+  return res.type('json')
+            .status(HttpStatusCode.NO_CONTENT_204)
+            .end()
 }
 
 async function getVideo (req: express.Request, res: express.Response) {
@@ -421,7 +424,7 @@ async function viewVideo (req: express.Request, res: express.Response) {
   const exists = await Redis.Instance.doesVideoIPViewExist(ip, immutableVideoAttrs.uuid)
   if (exists) {
     logger.debug('View for ip %s and video %s already exists.', ip, immutableVideoAttrs.uuid)
-    return res.sendStatus(204)
+    return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
   }
 
   const video = await VideoModel.load(immutableVideoAttrs.id)
@@ -454,7 +457,7 @@ async function viewVideo (req: express.Request, res: express.Response) {
 
   Hooks.runAction('action:api.video.viewed', { video, ip })
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function getVideoDescription (req: express.Request, res: express.Response) {
@@ -517,5 +520,7 @@ async function removeVideo (req: express.Request, res: express.Response) {
 
   Hooks.runAction('action:api.video.deleted', { video: videoInstance })
 
-  return res.type('json').status(204).end()
+  return res.type('json')
+            .status(HttpStatusCode.NO_CONTENT_204)
+            .end()
 }
diff --git a/server/controllers/api/videos/live.ts b/server/controllers/api/videos/live.ts
index e67d89612..04d2494ce 100644
--- a/server/controllers/api/videos/live.ts
+++ b/server/controllers/api/videos/live.ts
@@ -16,6 +16,7 @@ import { sequelizeTypescript } from '../../../initializers/database'
 import { createVideoMiniatureFromExisting } from '../../../lib/thumbnail'
 import { asyncMiddleware, asyncRetryTransactionMiddleware, authenticate } from '../../../middlewares'
 import { VideoModel } from '../../../models/video/video'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const liveRouter = express.Router()
 
@@ -75,7 +76,7 @@ async function updateLiveVideo (req: express.Request, res: express.Response) {
 
   await federateVideoIfNeeded(video, false)
 
-  return res.sendStatus(204)
+  return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
 }
 
 async function addLiveVideo (req: express.Request, res: express.Response) {
diff --git a/server/controllers/api/videos/ownership.ts b/server/controllers/api/videos/ownership.ts
index d76fee51d..86adb6c69 100644
--- a/server/controllers/api/videos/ownership.ts
+++ b/server/controllers/api/videos/ownership.ts
@@ -19,6 +19,7 @@ import { changeVideoChannelShare } from '../../../lib/activitypub/share'
 import { sendUpdateVideo } from '../../../lib/activitypub/send'
 import { VideoModel } from '../../../models/video/video'
 import { MVideoFullLight } from '@server/types/models'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const ownershipVideoRouter = express.Router()
 
@@ -80,7 +81,9 @@ async function giveVideoOwnership (req: express.Request, res: express.Response)
   })
 
   logger.info('Ownership change for video %s created.', videoInstance.name)
-  return res.type('json').status(204).end()
+  return res.type('json')
+            .status(HttpStatusCode.NO_CONTENT_204)
+            .end()
 }
 
 async function listVideoOwnership (req: express.Request, res: express.Response) {
@@ -119,7 +122,7 @@ async function acceptOwnership (req: express.Request, res: express.Response) {
     videoChangeOwnership.status = VideoChangeOwnershipStatus.ACCEPTED
     await videoChangeOwnership.save({ transaction: t })
 
-    return res.sendStatus(204)
+    return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
   })
 }
 
@@ -130,6 +133,6 @@ async function refuseOwnership (req: express.Request, res: express.Response) {
     videoChangeOwnership.status = VideoChangeOwnershipStatus.REFUSED
     await videoChangeOwnership.save({ transaction: t })
 
-    return res.sendStatus(204)
+    return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
   })
 }
diff --git a/server/controllers/api/videos/rate.ts b/server/controllers/api/videos/rate.ts
index df1eddb4f..520932c63 100644
--- a/server/controllers/api/videos/rate.ts
+++ b/server/controllers/api/videos/rate.ts
@@ -7,6 +7,7 @@ import { asyncMiddleware, asyncRetryTransactionMiddleware, authenticate, videoUp
 import { AccountModel } from '../../../models/account/account'
 import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
 import { sequelizeTypescript } from '../../../initializers/database'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const rateVideoRouter = express.Router()
 
@@ -78,5 +79,7 @@ async function rateVideo (req: express.Request, res: express.Response) {
     logger.info('Account video rate for video %s of account %s updated.', videoInstance.name, accountInstance.name)
   })
 
-  return res.type('json').status(204).end()
+  return res.type('json')
+            .status(HttpStatusCode.NO_CONTENT_204)
+            .end()
 }
diff --git a/server/controllers/api/videos/watching.ts b/server/controllers/api/videos/watching.ts
index 036e16f3a..627f12aa9 100644
--- a/server/controllers/api/videos/watching.ts
+++ b/server/controllers/api/videos/watching.ts
@@ -2,6 +2,7 @@ import * as express from 'express'
 import { UserWatchingVideo } from '../../../../shared'
 import { asyncMiddleware, asyncRetryTransactionMiddleware, authenticate, videoWatchingValidator } from '../../../middlewares'
 import { UserVideoHistoryModel } from '../../../models/account/user-video-history'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const watchingRouter = express.Router()
 
@@ -31,5 +32,7 @@ async function userWatchVideo (req: express.Request, res: express.Response) {
     currentTime: body.currentTime
   })
 
-  return res.type('json').status(204).end()
+  return res.type('json')
+            .status(HttpStatusCode.NO_CONTENT_204)
+            .end()
 }
diff --git a/server/controllers/client.ts b/server/controllers/client.ts
index 592233676..49e6fd661 100644
--- a/server/controllers/client.ts
+++ b/server/controllers/client.ts
@@ -8,6 +8,7 @@ import { logger } from '../helpers/logger'
 import { ACCEPT_HEADERS, STATIC_MAX_AGE } from '../initializers/constants'
 import { ClientHtml } from '../lib/client-html'
 import { asyncMiddleware, embedCSP } from '../middlewares'
+import { HttpStatusCode } from '@shared/core-utils'
 
 const clientsRouter = express.Router()
 
@@ -87,7 +88,7 @@ clientsRouter.use('/client', express.static(distPath, { maxAge: STATIC_MAX_AGE.C
 
 // 404 for static files not found
 clientsRouter.use('/client/*', (req: express.Request, res: express.Response) => {
-  res.sendStatus(404)
+  res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 })
 
 // Always serve index client page (the client is a single page application, let it handle routing)
@@ -114,7 +115,7 @@ function serveServerTranslations (req: express.Request, res: express.Response) {
     return res.sendFile(path, { maxAge: STATIC_MAX_AGE.SERVER })
   }
 
-  return res.sendStatus(404)
+  return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 }
 
 async function serveIndexHTML (req: express.Request, res: express.Response) {
@@ -127,7 +128,7 @@ async function serveIndexHTML (req: express.Request, res: express.Response) {
     }
   }
 
-  return res.status(404).end()
+  return res.status(HttpStatusCode.INTERNAL_SERVER_ERROR_500).end()
 }
 
 async function generateEmbedHtmlPage (req: express.Request, res: express.Response) {
diff --git a/server/controllers/lazy-static.ts b/server/controllers/lazy-static.ts
index 1ff99e90c..5c6369c9e 100644
--- a/server/controllers/lazy-static.ts
+++ b/server/controllers/lazy-static.ts
@@ -6,6 +6,7 @@ import { asyncMiddleware } from '../middlewares'
 import { AvatarModel } from '../models/avatar/avatar'
 import { logger } from '../helpers/logger'
 import { avatarPathUnsafeCache, pushAvatarProcessInQueue } from '../lib/avatar'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 
 const lazyStaticRouter = express.Router()
 
@@ -44,10 +45,10 @@ async function getAvatar (req: express.Request, res: express.Response) {
   }
 
   const avatar = await AvatarModel.loadByName(filename)
-  if (!avatar) return res.sendStatus(404)
+  if (!avatar) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
   if (avatar.onDisk === false) {
-    if (!avatar.fileUrl) return res.sendStatus(404)
+    if (!avatar.fileUrl) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
     logger.info('Lazy serve remote avatar image %s.', avatar.fileUrl)
 
@@ -55,7 +56,7 @@ async function getAvatar (req: express.Request, res: express.Response) {
       await pushAvatarProcessInQueue({ filename: avatar.filename, fileUrl: avatar.fileUrl })
     } catch (err) {
       logger.warn('Cannot process remote avatar %s.', avatar.fileUrl, { err })
-      return res.sendStatus(404)
+      return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
     }
 
     avatar.onDisk = true
@@ -71,7 +72,7 @@ async function getAvatar (req: express.Request, res: express.Response) {
 
 async function getPreview (req: express.Request, res: express.Response) {
   const result = await VideosPreviewCache.Instance.getFilePath(req.params.uuid)
-  if (!result) return res.sendStatus(404)
+  if (!result) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
   return res.sendFile(result.path, { maxAge: STATIC_MAX_AGE.SERVER })
 }
@@ -81,7 +82,7 @@ async function getVideoCaption (req: express.Request, res: express.Response) {
     videoId: req.params.videoId,
     language: req.params.captionLanguage
   })
-  if (!result) return res.sendStatus(404)
+  if (!result) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
   return res.sendFile(result.path, { maxAge: STATIC_MAX_AGE.SERVER })
 }
diff --git a/server/controllers/live.ts b/server/controllers/live.ts
index 5feadae72..ff48b0e21 100644
--- a/server/controllers/live.ts
+++ b/server/controllers/live.ts
@@ -2,6 +2,7 @@ import * as cors from 'cors'
 import * as express from 'express'
 import { mapToJSON } from '@server/helpers/core-utils'
 import { LiveManager } from '@server/lib/live-manager'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const liveRouter = express.Router()
 
@@ -24,7 +25,7 @@ function getSegmentsSha256 (req: express.Request, res: express.Response) {
   const result = LiveManager.Instance.getSegmentsSha256(videoUUID)
 
   if (!result) {
-    return res.sendStatus(404)
+    return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
   }
 
   return res.json(mapToJSON(result))
diff --git a/server/controllers/plugins.ts b/server/controllers/plugins.ts
index 7b947bb6e..18c6613e2 100644
--- a/server/controllers/plugins.ts
+++ b/server/controllers/plugins.ts
@@ -4,9 +4,10 @@ import { join } from 'path'
 import { PluginManager, RegisteredPlugin } from '../lib/plugins/plugin-manager'
 import { getPluginValidator, pluginStaticDirectoryValidator, getExternalAuthValidator } from '../middlewares/validators/plugins'
 import { serveThemeCSSValidator } from '../middlewares/validators/themes'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
+import { getCompleteLocale, is18nLocale } from '../../shared/core-utils/i18n'
 import { PluginType } from '../../shared/models/plugins/plugin.type'
 import { isTestInstance } from '../helpers/core-utils'
-import { getCompleteLocale, is18nLocale } from '../../shared/core-utils/i18n'
 import { logger } from '@server/helpers/logger'
 
 const sendFileOptions = {
@@ -96,7 +97,7 @@ function getPluginTranslations (req: express.Request, res: express.Response) {
     return res.json(json)
   }
 
-  return res.sendStatus(404)
+  return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 }
 
 function servePluginStaticDirectory (req: express.Request, res: express.Response) {
@@ -106,7 +107,7 @@ function servePluginStaticDirectory (req: express.Request, res: express.Response
   const [ directory, ...file ] = staticEndpoint.split('/')
 
   const staticPath = plugin.staticDirs[directory]
-  if (!staticPath) return res.sendStatus(404)
+  if (!staticPath) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
   const filepath = file.join('/')
   return res.sendFile(join(plugin.path, staticPath, filepath), sendFileOptions)
@@ -116,7 +117,7 @@ function servePluginCustomRoutes (req: express.Request, res: express.Response, n
   const plugin: RegisteredPlugin = res.locals.registeredPlugin
   const router = PluginManager.Instance.getRouter(plugin.npmName)
 
-  if (!router) return res.sendStatus(404)
+  if (!router) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
   return router(req, res, next)
 }
@@ -126,7 +127,7 @@ function servePluginClientScripts (req: express.Request, res: express.Response)
   const staticEndpoint = req.params.staticEndpoint
 
   const file = plugin.clientScripts[staticEndpoint]
-  if (!file) return res.sendStatus(404)
+  if (!file) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
   return res.sendFile(join(plugin.path, staticEndpoint), sendFileOptions)
 }
@@ -136,7 +137,7 @@ function serveThemeCSSDirectory (req: express.Request, res: express.Response) {
   const staticEndpoint = req.params.staticEndpoint
 
   if (plugin.css.includes(staticEndpoint) === false) {
-    return res.sendStatus(404)
+    return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
   }
 
   return res.sendFile(join(plugin.path, staticEndpoint), sendFileOptions)
diff --git a/server/controllers/static.ts b/server/controllers/static.ts
index e04c27b11..ff77452dd 100644
--- a/server/controllers/static.ts
+++ b/server/controllers/static.ts
@@ -26,6 +26,7 @@ import { MVideoFile, MVideoFullLight } from '@server/types/models'
 import { getTorrentFilePath, getVideoFilePath } from '@server/lib/video-paths'
 import { getThemeOrDefault } from '../lib/plugins/theme-utils'
 import { getEnabledResolutions, getRegisteredPlugins, getRegisteredThemes } from '@server/controllers/api/config'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const staticRouter = express.Router()
 
@@ -121,7 +122,7 @@ staticRouter.get('/robots.txt',
 // security.txt service
 staticRouter.get('/security.txt',
   (_, res: express.Response) => {
-    return res.redirect(301, '/.well-known/security.txt')
+    return res.redirect(HttpStatusCode.MOVED_PERMANENTLY_301, '/.well-known/security.txt')
   }
 )
 
@@ -331,7 +332,7 @@ async function generateNodeinfo (req: express.Request, res: express.Response) {
     res.contentType('application/json; profile="http://nodeinfo.diaspora.software/ns/schema/2.0#"')
   } else {
     json = { error: 'Nodeinfo schema version not handled' }
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
   }
 
   return res.send(json).end()
@@ -341,7 +342,7 @@ function downloadTorrent (req: express.Request, res: express.Response) {
   const video = res.locals.videoAll
 
   const videoFile = getVideoFile(req, video.VideoFiles)
-  if (!videoFile) return res.status(404).end()
+  if (!videoFile) return res.status(HttpStatusCode.NOT_FOUND_404).end()
 
   return res.download(getTorrentFilePath(video, videoFile), `${video.name}-${videoFile.resolution}p.torrent`)
 }
@@ -350,10 +351,10 @@ function downloadHLSVideoFileTorrent (req: express.Request, res: express.Respons
   const video = res.locals.videoAll
 
   const playlist = getHLSPlaylist(video)
-  if (!playlist) return res.status(404).end
+  if (!playlist) return res.status(HttpStatusCode.NOT_FOUND_404).end
 
   const videoFile = getVideoFile(req, playlist.VideoFiles)
-  if (!videoFile) return res.status(404).end()
+  if (!videoFile) return res.status(HttpStatusCode.NOT_FOUND_404).end()
 
   return res.download(getTorrentFilePath(playlist, videoFile), `${video.name}-${videoFile.resolution}p-hls.torrent`)
 }
@@ -362,7 +363,7 @@ function downloadVideoFile (req: express.Request, res: express.Response) {
   const video = res.locals.videoAll
 
   const videoFile = getVideoFile(req, video.VideoFiles)
-  if (!videoFile) return res.status(404).end()
+  if (!videoFile) return res.status(HttpStatusCode.NOT_FOUND_404).end()
 
   return res.download(getVideoFilePath(video, videoFile), `${video.name}-${videoFile.resolution}p${videoFile.extname}`)
 }
@@ -370,10 +371,10 @@ function downloadVideoFile (req: express.Request, res: express.Response) {
 function downloadHLSVideoFile (req: express.Request, res: express.Response) {
   const video = res.locals.videoAll
   const playlist = getHLSPlaylist(video)
-  if (!playlist) return res.status(404).end
+  if (!playlist) return res.status(HttpStatusCode.NOT_FOUND_404).end
 
   const videoFile = getVideoFile(req, playlist.VideoFiles)
-  if (!videoFile) return res.status(404).end()
+  if (!videoFile) return res.status(HttpStatusCode.NOT_FOUND_404).end()
 
   const filename = `${video.name}-${videoFile.resolution}p-${playlist.getStringType()}${videoFile.extname}`
   return res.download(getVideoFilePath(playlist, videoFile), filename)
diff --git a/server/helpers/custom-validators/video-comments.ts b/server/helpers/custom-validators/video-comments.ts
index 455ff4241..8d3ce580e 100644
--- a/server/helpers/custom-validators/video-comments.ts
+++ b/server/helpers/custom-validators/video-comments.ts
@@ -3,6 +3,7 @@ import validator from 'validator'
 import { VideoCommentModel } from '@server/models/video/video-comment'
 import { CONSTRAINTS_FIELDS } from '../../initializers/constants'
 import { MVideoId } from '@server/types/models'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const VIDEO_COMMENTS_CONSTRAINTS_FIELDS = CONSTRAINTS_FIELDS.VIDEO_COMMENTS
 
@@ -15,7 +16,7 @@ async function doesVideoCommentThreadExist (idArg: number | string, video: MVide
   const videoComment = await VideoCommentModel.loadById(id)
 
   if (!videoComment) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
       .json({ error: 'Video comment thread not found' })
       .end()
 
@@ -23,7 +24,7 @@ async function doesVideoCommentThreadExist (idArg: number | string, video: MVide
   }
 
   if (videoComment.videoId !== video.id) {
-    res.status(400)
+    res.status(HttpStatusCode.BAD_REQUEST_400)
       .json({ error: 'Video comment is not associated to this video.' })
       .end()
 
@@ -31,7 +32,7 @@ async function doesVideoCommentThreadExist (idArg: number | string, video: MVide
   }
 
   if (videoComment.inReplyToCommentId !== null) {
-    res.status(400)
+    res.status(HttpStatusCode.BAD_REQUEST_400)
       .json({ error: 'Video comment is not a thread.' })
       .end()
 
@@ -47,7 +48,7 @@ async function doesVideoCommentExist (idArg: number | string, video: MVideoId, r
   const videoComment = await VideoCommentModel.loadByIdAndPopulateVideoAndAccountAndReply(id)
 
   if (!videoComment) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
       .json({ error: 'Video comment thread not found' })
       .end()
 
@@ -55,7 +56,7 @@ async function doesVideoCommentExist (idArg: number | string, video: MVideoId, r
   }
 
   if (videoComment.videoId !== video.id) {
-    res.status(400)
+    res.status(HttpStatusCode.BAD_REQUEST_400)
       .json({ error: 'Video comment is not associated to this video.' })
       .end()
 
@@ -71,7 +72,7 @@ async function doesCommentIdExist (idArg: number | string, res: express.Response
   const videoComment = await VideoCommentModel.loadByIdAndPopulateVideoAndAccountAndReply(id)
 
   if (!videoComment) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
       .json({ error: 'Video comment thread not found' })
 
     return false
diff --git a/server/helpers/custom-validators/video-imports.ts b/server/helpers/custom-validators/video-imports.ts
index 33a1fa8ab..0063d3337 100644
--- a/server/helpers/custom-validators/video-imports.ts
+++ b/server/helpers/custom-validators/video-imports.ts
@@ -4,6 +4,7 @@ import { CONSTRAINTS_FIELDS, MIMETYPES, VIDEO_IMPORT_STATES } from '../../initia
 import { exists, isFileValid } from './misc'
 import * as express from 'express'
 import { VideoImportModel } from '../../models/video/video-import'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 function isVideoImportTargetUrlValid (url: string) {
   const isURLOptions = {
@@ -35,7 +36,7 @@ async function doesVideoImportExist (id: number, res: express.Response) {
   const videoImport = await VideoImportModel.loadAndPopulateVideo(id)
 
   if (!videoImport) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Video import not found' })
        .end()
 
diff --git a/server/helpers/custom-validators/video-ownership.ts b/server/helpers/custom-validators/video-ownership.ts
index ed5f8cc2f..ee3cebe10 100644
--- a/server/helpers/custom-validators/video-ownership.ts
+++ b/server/helpers/custom-validators/video-ownership.ts
@@ -2,13 +2,14 @@ import { Response } from 'express'
 import { VideoChangeOwnershipModel } from '../../models/video/video-change-ownership'
 import { MVideoChangeOwnershipFull } from '@server/types/models/video/video-change-ownership'
 import { MUserId } from '@server/types/models'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 export async function doesChangeVideoOwnershipExist (idArg: number | string, res: Response) {
   const id = parseInt(idArg + '', 10)
   const videoChangeOwnership = await VideoChangeOwnershipModel.load(id)
 
   if (!videoChangeOwnership) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
       .json({ error: 'Video change ownership not found' })
       .end()
 
@@ -24,7 +25,7 @@ export function checkUserCanTerminateOwnershipChange (user: MUserId, videoChange
     return true
   }
 
-  res.status(403)
+  res.status(HttpStatusCode.FORBIDDEN_403)
     .json({ error: 'Cannot terminate an ownership change of another user' })
     .end()
   return false
diff --git a/server/helpers/express-utils.ts b/server/helpers/express-utils.ts
index ba23557ba..c0d3f8f32 100644
--- a/server/helpers/express-utils.ts
+++ b/server/helpers/express-utils.ts
@@ -7,6 +7,7 @@ import { extname } from 'path'
 import { isArray } from './custom-validators/misc'
 import { CONFIG } from '../initializers/config'
 import { getExtFromMimetype } from './video'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 
 function buildNSFWFilter (res?: express.Response, paramNSFW?: string) {
   if (paramNSFW === 'true') return true
@@ -61,7 +62,9 @@ function getHostWithPort (host: string) {
 }
 
 function badRequest (req: express.Request, res: express.Response) {
-  return res.type('json').status(400).end()
+  return res.type('json')
+            .status(HttpStatusCode.BAD_REQUEST_400)
+            .end()
 }
 
 function createReqFiles (
diff --git a/server/helpers/middlewares/abuses.ts b/server/helpers/middlewares/abuses.ts
index 59ba0d3ed..c53bd9efd 100644
--- a/server/helpers/middlewares/abuses.ts
+++ b/server/helpers/middlewares/abuses.ts
@@ -1,11 +1,12 @@
 import { Response } from 'express'
 import { AbuseModel } from '../../models/abuse/abuse'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 async function doesAbuseExist (abuseId: number | string, res: Response) {
   const abuse = await AbuseModel.loadByIdWithReporter(parseInt(abuseId + '', 10))
 
   if (!abuse) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Abuse not found' })
 
     return false
diff --git a/server/helpers/middlewares/accounts.ts b/server/helpers/middlewares/accounts.ts
index e9b981262..23470cac6 100644
--- a/server/helpers/middlewares/accounts.ts
+++ b/server/helpers/middlewares/accounts.ts
@@ -3,6 +3,7 @@ import { AccountModel } from '../../models/account/account'
 import * as Bluebird from 'bluebird'
 import { MAccountDefault } from '../../types/models'
 import { UserModel } from '@server/models/account/user'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 function doesAccountIdExist (id: number | string, res: Response, sendNotFound = true) {
   const promise = AccountModel.load(parseInt(id + '', 10))
@@ -27,7 +28,7 @@ async function doesAccountExist (p: Bluebird<MAccountDefault>, res: Response, se
 
   if (!account) {
     if (sendNotFound === true) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
          .json({ error: 'Account not found' })
     }
 
@@ -43,7 +44,7 @@ async function doesUserFeedTokenCorrespond (id: number, token: string, res: Resp
   const user = await UserModel.loadByIdWithChannels(parseInt(id + '', 10))
 
   if (token !== user.feedToken) {
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: 'User and token mismatch' })
 
     return false
diff --git a/server/helpers/middlewares/video-blacklists.ts b/server/helpers/middlewares/video-blacklists.ts
index c79420a0c..eda1324d3 100644
--- a/server/helpers/middlewares/video-blacklists.ts
+++ b/server/helpers/middlewares/video-blacklists.ts
@@ -1,11 +1,12 @@
 import { Response } from 'express'
 import { VideoBlacklistModel } from '../../models/video/video-blacklist'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 async function doesVideoBlacklistExist (videoId: number, res: Response) {
   const videoBlacklist = await VideoBlacklistModel.loadByVideoId(videoId)
 
   if (videoBlacklist === null) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Blacklisted video not found' })
        .end()
 
diff --git a/server/helpers/middlewares/video-captions.ts b/server/helpers/middlewares/video-captions.ts
index f5ce29807..10267eda1 100644
--- a/server/helpers/middlewares/video-captions.ts
+++ b/server/helpers/middlewares/video-captions.ts
@@ -1,12 +1,13 @@
 import { Response } from 'express'
 import { VideoCaptionModel } from '../../models/video/video-caption'
 import { MVideoId } from '@server/types/models'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 async function doesVideoCaptionExist (video: MVideoId, language: string, res: Response) {
   const videoCaption = await VideoCaptionModel.loadByVideoIdAndLanguage(video.id, language)
 
   if (!videoCaption) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Video caption not found' })
        .end()
 
diff --git a/server/helpers/middlewares/video-channels.ts b/server/helpers/middlewares/video-channels.ts
index 6eecb8ee5..05499bb74 100644
--- a/server/helpers/middlewares/video-channels.ts
+++ b/server/helpers/middlewares/video-channels.ts
@@ -1,6 +1,7 @@
 import * as express from 'express'
 import { VideoChannelModel } from '../../models/video/video-channel'
 import { MChannelAccountDefault } from '@server/types/models'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 async function doesLocalVideoChannelNameExist (name: string, res: express.Response) {
   const videoChannel = await VideoChannelModel.loadLocalByNameAndPopulateAccount(name)
@@ -30,7 +31,7 @@ export {
 
 function processVideoChannelExist (videoChannel: MChannelAccountDefault, res: express.Response) {
   if (!videoChannel) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Video channel not found' })
        .end()
 
diff --git a/server/helpers/middlewares/video-playlists.ts b/server/helpers/middlewares/video-playlists.ts
index 344104f7c..d2dd80a35 100644
--- a/server/helpers/middlewares/video-playlists.ts
+++ b/server/helpers/middlewares/video-playlists.ts
@@ -1,6 +1,7 @@
 import * as express from 'express'
 import { VideoPlaylistModel } from '../../models/video/video-playlist'
 import { MVideoPlaylist } from '../../types/models/video/video-playlist'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 export type VideoPlaylistFetchType = 'summary' | 'all'
 async function doesVideoPlaylistExist (id: number | string, res: express.Response, fetchType: VideoPlaylistFetchType = 'summary') {
@@ -27,7 +28,7 @@ export {
 
 function handleVideoPlaylist (videoPlaylist: MVideoPlaylist, res: express.Response) {
   if (!videoPlaylist) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Video playlist not found' })
        .end()
 
diff --git a/server/helpers/middlewares/videos.ts b/server/helpers/middlewares/videos.ts
index 3904f762a..c5eb0607a 100644
--- a/server/helpers/middlewares/videos.ts
+++ b/server/helpers/middlewares/videos.ts
@@ -13,6 +13,7 @@ import {
   MVideoWithRights
 } from '@server/types/models'
 import { VideoFileModel } from '@server/models/video/video-file'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 async function doesVideoExist (id: number | string, res: Response, fetchType: VideoFetchType = 'all') {
   const userId = res.locals.oauth ? res.locals.oauth.token.User.id : undefined
@@ -20,7 +21,7 @@ async function doesVideoExist (id: number | string, res: Response, fetchType: Vi
   const video = await fetchVideo(id, fetchType, userId)
 
   if (video === null) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Video not found' })
        .end()
 
@@ -54,7 +55,7 @@ async function doesVideoExist (id: number | string, res: Response, fetchType: Vi
 
 async function doesVideoFileOfVideoExist (id: number, videoIdOrUUID: number | string, res: Response) {
   if (!await VideoFileModel.doesVideoExistForVideoFile(id, videoIdOrUUID)) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'VideoFile matching Video not found' })
        .end()
 
@@ -68,7 +69,7 @@ async function doesVideoChannelOfAccountExist (channelId: number, user: MUserAcc
   if (user.hasRight(UserRight.UPDATE_ANY_VIDEO) === true) {
     const videoChannel = await VideoChannelModel.loadAndPopulateAccount(channelId)
     if (videoChannel === null) {
-      res.status(400)
+      res.status(HttpStatusCode.BAD_REQUEST_400)
          .json({ error: 'Unknown video `video channel` on this instance.' })
          .end()
 
@@ -81,7 +82,7 @@ async function doesVideoChannelOfAccountExist (channelId: number, user: MUserAcc
 
   const videoChannel = await VideoChannelModel.loadByIdAndAccount(channelId, user.Account.id)
   if (videoChannel === null) {
-    res.status(400)
+    res.status(HttpStatusCode.BAD_REQUEST_400)
        .json({ error: 'Unknown video `video channel` for this account.' })
        .end()
 
@@ -95,7 +96,7 @@ async function doesVideoChannelOfAccountExist (channelId: number, user: MUserAcc
 function checkUserCanManageVideo (user: MUser, video: MVideoAccountLight, right: UserRight, res: Response, onlyOwned = true) {
   // Retrieve the user who did the request
   if (onlyOwned && video.isOwned() === false) {
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: 'Cannot manage a video of another server.' })
        .end()
     return false
@@ -106,7 +107,7 @@ function checkUserCanManageVideo (user: MUser, video: MVideoAccountLight, right:
   // Or if s/he is the video's account
   const account = video.VideoChannel.Account
   if (user.hasRight(right) === false && account.userId !== user.id) {
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: 'Cannot manage a video of another user.' })
        .end()
     return false
diff --git a/server/lib/auth.ts b/server/lib/auth.ts
index acf0da18a..466c9bdd4 100644
--- a/server/lib/auth.ts
+++ b/server/lib/auth.ts
@@ -13,6 +13,7 @@ import {
 } from '@server/types/plugins/register-server-auth.model'
 import * as express from 'express'
 import * as OAuthServer from 'express-oauth-server'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const oAuthServer = new OAuthServer({
   useErrorHandler: true,
@@ -215,7 +216,7 @@ function proxifyExternalAuthBypass (req: express.Request, res: express.Response)
   const obj = authBypassTokens.get(req.body.externalAuthToken)
   if (!obj) {
     logger.error('Cannot authenticate user with unknown bypass token')
-    return res.sendStatus(400)
+    return res.sendStatus(HttpStatusCode.BAD_REQUEST_400)
   }
 
   const { expires, user, authName, npmName } = obj
@@ -223,12 +224,12 @@ function proxifyExternalAuthBypass (req: express.Request, res: express.Response)
   const now = new Date()
   if (now.getTime() > expires.getTime()) {
     logger.error('Cannot authenticate user with an expired external auth token')
-    return res.sendStatus(400)
+    return res.sendStatus(HttpStatusCode.BAD_REQUEST_400)
   }
 
   if (user.username !== req.body.username) {
     logger.error('Cannot authenticate user %s with invalid username %s.', req.body.username)
-    return res.sendStatus(400)
+    return res.sendStatus(HttpStatusCode.BAD_REQUEST_400)
   }
 
   // Bypass oauth library validation
diff --git a/server/lib/client-html.ts b/server/lib/client-html.ts
index 7d1d19588..a1a4a5316 100644
--- a/server/lib/client-html.ts
+++ b/server/lib/client-html.ts
@@ -22,6 +22,7 @@ import * as Bluebird from 'bluebird'
 import { CONFIG } from '../initializers/config'
 import { logger } from '../helpers/logger'
 import { MAccountActor, MChannelActor } from '../types/models'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 
 type Tags = {
   ogType: string
@@ -75,7 +76,7 @@ export class ClientHtml {
   static async getWatchHTMLPage (videoId: string, req: express.Request, res: express.Response) {
     // Let Angular application handle errors
     if (!validator.isInt(videoId) && !validator.isUUID(videoId, 4)) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
       return ClientHtml.getIndexHTML(req, res)
     }
 
@@ -86,7 +87,7 @@ export class ClientHtml {
 
     // Let Angular application handle errors
     if (!video || video.privacy === VideoPrivacy.PRIVATE || video.privacy === VideoPrivacy.INTERNAL || video.VideoBlacklist) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
       return html
     }
 
@@ -121,7 +122,7 @@ export class ClientHtml {
   static async getWatchPlaylistHTMLPage (videoPlaylistId: string, req: express.Request, res: express.Response) {
     // Let Angular application handle errors
     if (!validator.isInt(videoPlaylistId) && !validator.isUUID(videoPlaylistId, 4)) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
       return ClientHtml.getIndexHTML(req, res)
     }
 
@@ -132,7 +133,7 @@ export class ClientHtml {
 
     // Let Angular application handle errors
     if (!videoPlaylist || videoPlaylist.privacy === VideoPlaylistPrivacy.PRIVATE) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
       return html
     }
 
@@ -201,7 +202,7 @@ export class ClientHtml {
 
     // Let Angular application handle errors
     if (!entity) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
       return ClientHtml.getIndexHTML(req, res)
     }
 
diff --git a/server/middlewares/activitypub.ts b/server/middlewares/activitypub.ts
index d00594059..ce94a2129 100644
--- a/server/middlewares/activitypub.ts
+++ b/server/middlewares/activitypub.ts
@@ -7,6 +7,7 @@ import { getOrCreateActorAndServerAndModel } from '../lib/activitypub/actor'
 import { loadActorUrlOrGetFromWebfinger } from '../helpers/webfinger'
 import { isActorDeleteActivityValid } from '@server/helpers/custom-validators/activitypub/actor'
 import { getAPId } from '@server/helpers/activitypub'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 
 async function checkSignature (req: Request, res: Response, next: NextFunction) {
   try {
@@ -28,11 +29,11 @@ async function checkSignature (req: Request, res: Response, next: NextFunction)
     const activity: ActivityDelete = req.body
     if (isActorDeleteActivityValid(activity) && activity.object === activity.actor) {
       logger.debug('Handling signature error on actor delete activity', { err })
-      return res.sendStatus(204)
+      return res.sendStatus(HttpStatusCode.NO_CONTENT_204)
     }
 
     logger.warn('Error in ActivityPub signature checker.', { err })
-    return res.sendStatus(403)
+    return res.sendStatus(HttpStatusCode.FORBIDDEN_403)
   }
 }
 
@@ -70,13 +71,13 @@ async function checkHttpSignature (req: Request, res: Response) {
   } catch (err) {
     logger.warn('Invalid signature because of exception in signature parser', { reqBody: req.body, err })
 
-    res.status(403).json({ error: err.message })
+    res.status(HttpStatusCode.FORBIDDEN_403).json({ error: err.message })
     return false
   }
 
   const keyId = parsed.keyId
   if (!keyId) {
-    res.sendStatus(403)
+    res.sendStatus(HttpStatusCode.FORBIDDEN_403)
     return false
   }
 
@@ -93,7 +94,7 @@ async function checkHttpSignature (req: Request, res: Response) {
   if (verified !== true) {
     logger.warn('Signature from %s is invalid', actorUrl, { parsed })
 
-    res.sendStatus(403)
+    res.sendStatus(HttpStatusCode.FORBIDDEN_403)
     return false
   }
 
@@ -106,7 +107,7 @@ async function checkJsonLDSignature (req: Request, res: Response) {
   const signatureObject: ActivityPubSignature = req.body.signature
 
   if (!signatureObject || !signatureObject.creator) {
-    res.sendStatus(403)
+    res.sendStatus(HttpStatusCode.FORBIDDEN_403)
     return false
   }
 
@@ -120,7 +121,7 @@ async function checkJsonLDSignature (req: Request, res: Response) {
   if (verified !== true) {
     logger.warn('Signature not verified.', req.body)
 
-    res.sendStatus(403)
+    res.sendStatus(HttpStatusCode.FORBIDDEN_403)
     return false
   }
 
diff --git a/server/middlewares/oauth.ts b/server/middlewares/oauth.ts
index bd60a3639..ab5301415 100644
--- a/server/middlewares/oauth.ts
+++ b/server/middlewares/oauth.ts
@@ -3,6 +3,7 @@ import { Socket } from 'socket.io'
 import { oAuthServer } from '@server/lib/auth'
 import { logger } from '../helpers/logger'
 import { getAccessToken } from '../lib/oauth-model'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 
 function authenticate (req: express.Request, res: express.Response, next: express.NextFunction, authenticateInQuery = false) {
   const options = authenticateInQuery ? { allowBearerTokensInQueryString: true } : {}
@@ -50,7 +51,7 @@ function authenticatePromiseIfNeeded (req: express.Request, res: express.Respons
     // Already authenticated? (or tried to)
     if (res.locals.oauth?.token.User) return resolve()
 
-    if (res.locals.authenticated === false) return res.sendStatus(401)
+    if (res.locals.authenticated === false) return res.sendStatus(HttpStatusCode.UNAUTHORIZED_401)
 
     authenticate(req, res, () => resolve(), authenticateInQuery)
   })
diff --git a/server/middlewares/servers.ts b/server/middlewares/servers.ts
index 9c0af443a..5e1c165f0 100644
--- a/server/middlewares/servers.ts
+++ b/server/middlewares/servers.ts
@@ -1,5 +1,6 @@
 import * as express from 'express'
 import { getHostWithPort } from '../helpers/express-utils'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 
 function setBodyHostsPort (req: express.Request, res: express.Response, next: express.NextFunction) {
   if (!req.body.hosts) return next()
@@ -9,7 +10,7 @@ function setBodyHostsPort (req: express.Request, res: express.Response, next: ex
 
     // Problem with the url parsing?
     if (hostWithPort === null) {
-      return res.sendStatus(500)
+      return res.sendStatus(HttpStatusCode.INTERNAL_SERVER_ERROR_500)
     }
 
     req.body.hosts[i] = hostWithPort
diff --git a/server/middlewares/user-right.ts b/server/middlewares/user-right.ts
index aaf0b323a..45dda4781 100644
--- a/server/middlewares/user-right.ts
+++ b/server/middlewares/user-right.ts
@@ -1,6 +1,7 @@
 import * as express from 'express'
 import { UserRight } from '../../shared'
 import { logger } from '../helpers/logger'
+import { HttpStatusCode } from '../../shared/core-utils/miscs/http-error-codes'
 
 function ensureUserHasRight (userRight: UserRight) {
   return function (req: express.Request, res: express.Response, next: express.NextFunction) {
@@ -9,7 +10,8 @@ function ensureUserHasRight (userRight: UserRight) {
       const message = `User ${user.username} does not have right ${userRight} to access to ${req.path}.`
       logger.info(message)
 
-      return res.status(403).json({ error: message })
+      return res.status(HttpStatusCode.FORBIDDEN_403)
+                .json({ error: message })
     }
 
     return next()
diff --git a/server/middlewares/validators/abuse.ts b/server/middlewares/validators/abuse.ts
index 99403ca40..3b897fdef 100644
--- a/server/middlewares/validators/abuse.ts
+++ b/server/middlewares/validators/abuse.ts
@@ -19,6 +19,7 @@ import { doesAbuseExist, doesAccountIdExist, doesVideoExist } from '@server/help
 import { AbuseMessageModel } from '@server/models/abuse/abuse-message'
 import { AbuseCreate, UserRight } from '@shared/models'
 import { areValidationErrors } from './utils'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const abuseReportValidator = [
   body('account.id')
@@ -70,8 +71,8 @@ const abuseReportValidator = [
     if (body.comment?.id && !await doesCommentIdExist(body.comment.id, res)) return
 
     if (!body.video?.id && !body.account?.id && !body.comment?.id) {
-      res.status(400)
-        .json({ error: 'video id or account id or comment id is required.' })
+      res.status(HttpStatusCode.BAD_REQUEST_400)
+         .json({ error: 'video id or account id or comment id is required.' })
 
       return
     }
@@ -194,7 +195,8 @@ const getAbuseValidator = [
       const message = `User ${user.username} does not have right to get abuse ${abuse.id}`
       logger.warn(message)
 
-      return res.status(403).json({ error: message })
+      return res.status(HttpStatusCode.FORBIDDEN_403)
+                .json({ error: message })
     }
 
     return next()
@@ -207,9 +209,10 @@ const checkAbuseValidForMessagesValidator = [
 
     const abuse = res.locals.abuse
     if (abuse.ReporterAccount.isOwned() === false) {
-      return res.status(400).json({
-        error: 'This abuse was created by a user of your instance.'
-      })
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
+                .json({
+                  error: 'This abuse was created by a user of your instance.'
+                })
     }
 
     return next()
@@ -243,11 +246,13 @@ const deleteAbuseMessageValidator = [
     const abuseMessage = await AbuseMessageModel.loadByIdAndAbuseId(messageId, abuse.id)
 
     if (!abuseMessage) {
-      return res.status(404).json({ error: 'Abuse message not found' })
+      return res.status(HttpStatusCode.NOT_FOUND_404)
+                .json({ error: 'Abuse message not found' })
     }
 
     if (user.hasRight(UserRight.MANAGE_ABUSES) !== true && abuseMessage.accountId !== user.Account.id) {
-      return res.status(403).json({ error: 'Cannot delete this abuse message' })
+      return res.status(HttpStatusCode.FORBIDDEN_403)
+                .json({ error: 'Cannot delete this abuse message' })
     }
 
     res.locals.abuseMessage = abuseMessage
diff --git a/server/middlewares/validators/activitypub/activity.ts b/server/middlewares/validators/activitypub/activity.ts
index 7350be5d5..255d8eb17 100644
--- a/server/middlewares/validators/activitypub/activity.ts
+++ b/server/middlewares/validators/activitypub/activity.ts
@@ -2,20 +2,23 @@ import * as express from 'express'
 import { isRootActivityValid } from '../../../helpers/custom-validators/activitypub/activity'
 import { logger } from '../../../helpers/logger'
 import { getServerActor } from '@server/models/application/application'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 async function activityPubValidator (req: express.Request, res: express.Response, next: express.NextFunction) {
   logger.debug('Checking activity pub parameters')
 
   if (!isRootActivityValid(req.body)) {
     logger.warn('Incorrect activity parameters.', { activity: req.body })
-    return res.status(400).json({ error: 'Incorrect activity.' })
+    return res.status(HttpStatusCode.BAD_REQUEST_400)
+              .json({ error: 'Incorrect activity.' })
   }
 
   const serverActor = await getServerActor()
   const remoteActor = res.locals.signature.actor
   if (serverActor.id === remoteActor.id) {
     logger.error('Receiving request in INBOX by ourselves!', req.body)
-    return res.status(409).end()
+    return res.status(HttpStatusCode.CONFLICT_409)
+              .end()
   }
 
   return next()
diff --git a/server/middlewares/validators/blocklist.ts b/server/middlewares/validators/blocklist.ts
index c24fa9609..f61811a1a 100644
--- a/server/middlewares/validators/blocklist.ts
+++ b/server/middlewares/validators/blocklist.ts
@@ -9,6 +9,7 @@ import { ServerModel } from '../../models/server/server'
 import { WEBSERVER } from '../../initializers/constants'
 import { doesAccountNameWithHostExist } from '../../helpers/middlewares'
 import { getServerActor } from '@server/models/application/application'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const blockAccountValidator = [
   body('accountName').exists().withMessage('Should have an account name with host'),
@@ -23,7 +24,7 @@ const blockAccountValidator = [
     const accountToBlock = res.locals.account
 
     if (user.Account.id === accountToBlock.id) {
-      res.status(409)
+      res.status(HttpStatusCode.CONFLICT_409)
          .json({ error: 'You cannot block yourself.' })
 
       return
@@ -78,7 +79,7 @@ const blockServerValidator = [
     const host: string = req.body.host
 
     if (host === WEBSERVER.HOST) {
-      return res.status(409)
+      return res.status(HttpStatusCode.CONFLICT_409)
         .json({ error: 'You cannot block your own server.' })
     }
 
@@ -136,7 +137,7 @@ export {
 async function doesUnblockAccountExist (accountId: number, targetAccountId: number, res: express.Response) {
   const accountBlock = await AccountBlocklistModel.loadByAccountAndTarget(accountId, targetAccountId)
   if (!accountBlock) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Account block entry not found.' })
 
     return false
@@ -150,7 +151,7 @@ async function doesUnblockAccountExist (accountId: number, targetAccountId: numb
 async function doesUnblockServerExist (accountId: number, host: string, res: express.Response) {
   const serverBlock = await ServerBlocklistModel.loadByAccountAndHost(accountId, host)
   if (!serverBlock) {
-    res.status(404)
+    res.status(HttpStatusCode.NOT_FOUND_404)
        .json({ error: 'Server block entry not found.' })
 
     return false
diff --git a/server/middlewares/validators/bulk.ts b/server/middlewares/validators/bulk.ts
index f9b0f565a..cfb16d352 100644
--- a/server/middlewares/validators/bulk.ts
+++ b/server/middlewares/validators/bulk.ts
@@ -6,6 +6,7 @@ import { UserRight } from '@shared/models'
 import { BulkRemoveCommentsOfBody } from '@shared/models/bulk/bulk-remove-comments-of-body.model'
 import { logger } from '../../helpers/logger'
 import { areValidationErrors } from './utils'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const bulkRemoveCommentsOfValidator = [
   body('accountName').exists().withMessage('Should have an account name with host'),
@@ -22,7 +23,7 @@ const bulkRemoveCommentsOfValidator = [
     const body = req.body as BulkRemoveCommentsOfBody
 
     if (body.scope === 'instance' && user.hasRight(UserRight.REMOVE_ANY_VIDEO_COMMENT) !== true) {
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
       .json({
         error: 'User cannot remove any comments of this instance.'
       })
diff --git a/server/middlewares/validators/config.ts b/server/middlewares/validators/config.ts
index d0071ccc1..93de453a7 100644
--- a/server/middlewares/validators/config.ts
+++ b/server/middlewares/validators/config.ts
@@ -8,6 +8,7 @@ import { isUserNSFWPolicyValid, isUserVideoQuotaDailyValid, isUserVideoQuotaVali
 import { logger } from '../../helpers/logger'
 import { isThemeRegistered } from '../../lib/plugins/theme-utils'
 import { areValidationErrors } from './utils'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const customConfigUpdateValidator = [
   body('instance.name').exists().withMessage('Should have a valid instance name'),
@@ -105,9 +106,9 @@ function checkInvalidConfigIfEmailDisabled (customConfig: CustomConfig, res: exp
   if (isEmailEnabled()) return true
 
   if (customConfig.signup.requiresEmailVerification === true) {
-    res.status(400)
-      .send({ error: 'Emailer is disabled but you require signup email verification.' })
-      .end()
+    res.status(HttpStatusCode.BAD_REQUEST_400)
+       .send({ error: 'Emailer is disabled but you require signup email verification.' })
+       .end()
     return false
   }
 
@@ -118,7 +119,7 @@ function checkInvalidTranscodingConfig (customConfig: CustomConfig, res: express
   if (customConfig.transcoding.enabled === false) return true
 
   if (customConfig.transcoding.webtorrent.enabled === false && customConfig.transcoding.hls.enabled === false) {
-    res.status(400)
+    res.status(HttpStatusCode.BAD_REQUEST_400)
        .send({ error: 'You need to enable at least webtorrent transcoding or hls transcoding' })
        .end()
     return false
@@ -131,7 +132,7 @@ function checkInvalidLiveConfig (customConfig: CustomConfig, res: express.Respon
   if (customConfig.live.enabled === false) return true
 
   if (customConfig.live.allowReplay === true && customConfig.transcoding.enabled === false) {
-    res.status(400)
+    res.status(HttpStatusCode.BAD_REQUEST_400)
        .send({ error: 'You cannot allow live replay if transcoding is not enabled' })
        .end()
     return false
diff --git a/server/middlewares/validators/feeds.ts b/server/middlewares/validators/feeds.ts
index 18469bad3..617661813 100644
--- a/server/middlewares/validators/feeds.ts
+++ b/server/middlewares/validators/feeds.ts
@@ -12,6 +12,7 @@ import {
 } from '../../helpers/middlewares'
 import { doesVideoExist } from '../../helpers/middlewares/videos'
 import { areValidationErrors } from './utils'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const feedsFormatValidator = [
   param('format').optional().custom(isValidRSSFeed).withMessage('Should have a valid format (rss, atom, json)'),
@@ -35,7 +36,7 @@ function setFeedFormatContentType (req: express.Request, res: express.Response,
   if (req.accepts(acceptableContentTypes)) {
     res.set('Content-Type', req.accepts(acceptableContentTypes) as string)
   } else {
-    return res.status(406)
+    return res.status(HttpStatusCode.NOT_ACCEPTABLE_406)
               .json({
                 message: `You should accept at least one of the following content-types: ${acceptableContentTypes.join(', ')}`
               })
@@ -105,7 +106,7 @@ const videoCommentsFeedsValidator = [
     if (areValidationErrors(req, res)) return
 
     if (req.query.videoId && (req.query.videoChannelId || req.query.videoChannelName)) {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({
                   message: 'videoId cannot be mixed with a channel filter'
                 })
diff --git a/server/middlewares/validators/follows.ts b/server/middlewares/validators/follows.ts
index 2c1ddf2df..a590aca99 100644
--- a/server/middlewares/validators/follows.ts
+++ b/server/middlewares/validators/follows.ts
@@ -12,6 +12,7 @@ import { isActorTypeValid, isValidActorHandle } from '../../helpers/custom-valid
 import { MActorFollowActorsDefault } from '@server/types/models'
 import { isFollowStateValid } from '@server/helpers/custom-validators/follows'
 import { getServerActor } from '@server/models/application/application'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const listFollowsValidator = [
   query('state')
@@ -34,7 +35,8 @@ const followValidator = [
   (req: express.Request, res: express.Response, next: express.NextFunction) => {
     // Force https if the administrator wants to make friends
     if (isTestInstance() === false && WEBSERVER.SCHEME === 'http') {
-      return res.status(500)
+      return res
+        .status(HttpStatusCode.INTERNAL_SERVER_ERROR_500)
         .json({
           error: 'Cannot follow on a non HTTPS web server.'
         })
@@ -62,7 +64,7 @@ const removeFollowingValidator = [
 
     if (!follow) {
       return res
-        .status(404)
+        .status(HttpStatusCode.NOT_FOUND_404)
         .json({
           error: `Following ${req.params.host} not found.`
         })
@@ -95,7 +97,7 @@ const getFollowerValidator = [
 
     if (!follow) {
       return res
-        .status(404)
+        .status(HttpStatusCode.NOT_FOUND_404)
         .json({
           error: `Follower ${req.params.nameWithHost} not found.`
         })
@@ -113,7 +115,12 @@ const acceptOrRejectFollowerValidator = [
 
     const follow = res.locals.follow
     if (follow.state !== 'pending') {
-      return res.status(400).json({ error: 'Follow is not in pending state.' }).end()
+      return res
+        .status(HttpStatusCode.BAD_REQUEST_400)
+        .json({
+          error: 'Follow is not in pending state.'
+        })
+        .end()
     }
 
     return next()
diff --git a/server/middlewares/validators/oembed.ts b/server/middlewares/validators/oembed.ts
index c9f9ea0c0..86623efcd 100644
--- a/server/middlewares/validators/oembed.ts
+++ b/server/middlewares/validators/oembed.ts
@@ -9,6 +9,7 @@ import { isIdOrUUIDValid } from '../../helpers/custom-validators/misc'
 import { logger } from '../../helpers/logger'
 import { WEBSERVER } from '../../initializers/constants'
 import { areValidationErrors } from './utils'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const startVideoPlaylistsURL = WEBSERVER.SCHEME + '://' + join(WEBSERVER.HOST, 'videos', 'watch', 'playlist') + '/'
 const startVideosURL = WEBSERVER.SCHEME + '://' + join(WEBSERVER.HOST, 'videos', 'watch') + '/'
@@ -36,7 +37,7 @@ const oembedValidator = [
     if (areValidationErrors(req, res)) return
 
     if (req.query.format !== undefined && req.query.format !== 'json') {
-      return res.status(501)
+      return res.status(HttpStatusCode.NOT_IMPLEMENTED_501)
         .json({ error: 'Requested format is not implemented on server.' })
     }
 
@@ -50,13 +51,13 @@ const oembedValidator = [
     const matches = watchRegex.exec(url)
 
     if (startIsOk === false || matches === null) {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
         .json({ error: 'Invalid url.' })
     }
 
     const elementId = matches[1]
     if (isIdOrUUIDValid(elementId) === false) {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
         .json({ error: 'Invalid video or playlist id.' })
     }
 
@@ -64,12 +65,12 @@ const oembedValidator = [
       const video = await fetchVideo(elementId, 'all')
 
       if (!video) {
-        return res.status(404)
+        return res.status(HttpStatusCode.NOT_FOUND_404)
           .json({ error: 'Video not found' })
       }
 
       if (video.privacy !== VideoPrivacy.PUBLIC) {
-        return res.status(403)
+        return res.status(HttpStatusCode.FORBIDDEN_403)
           .json({ error: 'Video is not public' })
       }
 
@@ -81,12 +82,12 @@ const oembedValidator = [
 
     const videoPlaylist = await VideoPlaylistModel.loadWithAccountAndChannelSummary(elementId, undefined)
     if (!videoPlaylist) {
-      return res.status(404)
+      return res.status(HttpStatusCode.NOT_FOUND_404)
         .json({ error: 'Video playlist not found' })
     }
 
     if (videoPlaylist.privacy !== VideoPlaylistPrivacy.PUBLIC) {
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'Playlist is not public' })
     }
 
diff --git a/server/middlewares/validators/plugins.ts b/server/middlewares/validators/plugins.ts
index cba261dc0..bbac55a50 100644
--- a/server/middlewares/validators/plugins.ts
+++ b/server/middlewares/validators/plugins.ts
@@ -9,6 +9,7 @@ import { PluginModel } from '../../models/server/plugin'
 import { InstallOrUpdatePlugin } from '../../../shared/models/plugins/install-plugin.model'
 import { PluginType } from '../../../shared/models/plugins/plugin.type'
 import { CONFIG } from '../../initializers/config'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const getPluginValidator = (pluginType: PluginType, withVersion = true) => {
   const validators: (ValidationChain | express.Handler)[] = [
@@ -30,8 +31,8 @@ const getPluginValidator = (pluginType: PluginType, withVersion = true) => {
       const npmName = PluginModel.buildNpmName(req.params.pluginName, pluginType)
       const plugin = PluginManager.Instance.getRegisteredPluginOrTheme(npmName)
 
-      if (!plugin) return res.sendStatus(404)
-      if (withVersion && plugin.version !== req.params.pluginVersion) return res.sendStatus(404)
+      if (!plugin) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
+      if (withVersion && plugin.version !== req.params.pluginVersion) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
       res.locals.registeredPlugin = plugin
 
@@ -49,10 +50,10 @@ const getExternalAuthValidator = [
     if (areValidationErrors(req, res)) return
 
     const plugin = res.locals.registeredPlugin
-    if (!plugin.registerHelpersStore) return res.sendStatus(404)
+    if (!plugin.registerHelpersStore) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
     const externalAuth = plugin.registerHelpersStore.getExternalAuths().find(a => a.authName === req.params.authName)
-    if (!externalAuth) return res.sendStatus(404)
+    if (!externalAuth) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
     res.locals.externalAuth = externalAuth
 
@@ -106,7 +107,7 @@ const installOrUpdatePluginValidator = [
 
     const body: InstallOrUpdatePlugin = req.body
     if (!body.path && !body.npmName) {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({ error: 'Should have either a npmName or a path' })
                 .end()
     }
@@ -137,9 +138,9 @@ const existingPluginValidator = [
 
     const plugin = await PluginModel.loadByNpmName(req.params.npmName)
     if (!plugin) {
-      return res.status(404)
-         .json({ error: 'Plugin not found' })
-         .end()
+      return res.status(HttpStatusCode.NOT_FOUND_404)
+                .json({ error: 'Plugin not found' })
+                .end()
     }
 
     res.locals.plugin = plugin
@@ -178,9 +179,9 @@ const listAvailablePluginsValidator = [
     if (areValidationErrors(req, res)) return
 
     if (CONFIG.PLUGINS.INDEX.ENABLED === false) {
-      return res.status(400)
-        .json({ error: 'Plugin index is not enabled' })
-        .end()
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
+                .json({ error: 'Plugin index is not enabled' })
+                .end()
     }
 
     return next()
diff --git a/server/middlewares/validators/redundancy.ts b/server/middlewares/validators/redundancy.ts
index 8cd3bc33d..6d2dd39c9 100644
--- a/server/middlewares/validators/redundancy.ts
+++ b/server/middlewares/validators/redundancy.ts
@@ -8,6 +8,7 @@ import { isHostValid } from '../../helpers/custom-validators/servers'
 import { ServerModel } from '../../models/server/server'
 import { doesVideoExist } from '../../helpers/middlewares'
 import { isVideoRedundancyTarget } from '@server/helpers/custom-validators/video-redundancies'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const videoFileRedundancyGetValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid video id'),
@@ -34,11 +35,11 @@ const videoFileRedundancyGetValidator = [
       return f.resolution === paramResolution && (!req.params.fps || paramFPS)
     })
 
-    if (!videoFile) return res.status(404).json({ error: 'Video file not found.' })
+    if (!videoFile) return res.status(HttpStatusCode.NOT_FOUND_404).json({ error: 'Video file not found.' })
     res.locals.videoFile = videoFile
 
     const videoRedundancy = await VideoRedundancyModel.loadLocalByFileId(videoFile.id)
-    if (!videoRedundancy) return res.status(404).json({ error: 'Video redundancy not found.' })
+    if (!videoRedundancy) return res.status(HttpStatusCode.NOT_FOUND_404).json({ error: 'Video redundancy not found.' })
     res.locals.videoRedundancy = videoRedundancy
 
     return next()
@@ -64,11 +65,11 @@ const videoPlaylistRedundancyGetValidator = [
     const paramPlaylistType = req.params.streamingPlaylistType as unknown as number // We casted to int above
     const videoStreamingPlaylist = video.VideoStreamingPlaylists.find(p => p.type === paramPlaylistType)
 
-    if (!videoStreamingPlaylist) return res.status(404).json({ error: 'Video playlist not found.' })
+    if (!videoStreamingPlaylist) return res.status(HttpStatusCode.NOT_FOUND_404).json({ error: 'Video playlist not found.' })
     res.locals.videoStreamingPlaylist = videoStreamingPlaylist
 
     const videoRedundancy = await VideoRedundancyModel.loadLocalByStreamingPlaylistId(videoStreamingPlaylist.id)
-    if (!videoRedundancy) return res.status(404).json({ error: 'Video redundancy not found.' })
+    if (!videoRedundancy) return res.status(HttpStatusCode.NOT_FOUND_404).json({ error: 'Video redundancy not found.' })
     res.locals.videoRedundancy = videoRedundancy
 
     return next()
@@ -90,7 +91,7 @@ const updateServerRedundancyValidator = [
 
     if (!server) {
       return res
-        .status(404)
+        .status(HttpStatusCode.NOT_FOUND_404)
         .json({
           error: `Server ${req.params.host} not found.`
         })
@@ -128,15 +129,15 @@ const addVideoRedundancyValidator = [
     if (!await doesVideoExist(req.body.videoId, res, 'only-video')) return
 
     if (res.locals.onlyVideo.remote === false) {
-      return res.status(400)
-        .json({ error: 'Cannot create a redundancy on a local video' })
-        .end()
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
+                .json({ error: 'Cannot create a redundancy on a local video' })
+                .end()
     }
 
     const alreadyExists = await VideoRedundancyModel.isLocalByVideoUUIDExists(res.locals.onlyVideo.uuid)
     if (alreadyExists) {
-      return res.status(409)
-        .json({ error: 'This video is already duplicated by your instance.' })
+      return res.status(HttpStatusCode.CONFLICT_409)
+                .json({ error: 'This video is already duplicated by your instance.' })
     }
 
     return next()
@@ -155,7 +156,7 @@ const removeVideoRedundancyValidator = [
 
     const redundancy = await VideoRedundancyModel.loadByIdWithVideo(parseInt(req.params.redundancyId, 10))
     if (!redundancy) {
-      return res.status(404)
+      return res.status(HttpStatusCode.NOT_FOUND_404)
                 .json({ error: 'Video redundancy not found' })
                 .end()
     }
diff --git a/server/middlewares/validators/server.ts b/server/middlewares/validators/server.ts
index 6158c3363..fe6704716 100644
--- a/server/middlewares/validators/server.ts
+++ b/server/middlewares/validators/server.ts
@@ -7,6 +7,7 @@ import { body } from 'express-validator'
 import { isUserDisplayNameValid } from '../../helpers/custom-validators/users'
 import { Redis } from '../../lib/redis'
 import { CONFIG, isEmailEnabled } from '../../initializers/config'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const serverGetValidator = [
   body('host').custom(isHostValid).withMessage('Should have a valid host'),
@@ -18,9 +19,9 @@ const serverGetValidator = [
 
     const server = await ServerModel.loadByHost(req.body.host)
     if (!server) {
-      return res.status(404)
-         .send({ error: 'Server host not found.' })
-         .end()
+      return res.status(HttpStatusCode.NOT_FOUND_404)
+                .send({ error: 'Server host not found.' })
+                .end()
     }
 
     res.locals.server = server
@@ -44,14 +45,14 @@ const contactAdministratorValidator = [
 
     if (CONFIG.CONTACT_FORM.ENABLED === false) {
       return res
-        .status(409)
+        .status(HttpStatusCode.CONFLICT_409)
         .send({ error: 'Contact form is not enabled on this instance.' })
         .end()
     }
 
     if (isEmailEnabled() === false) {
       return res
-        .status(409)
+        .status(HttpStatusCode.CONFLICT_409)
         .send({ error: 'Emailer is not enabled on this instance.' })
         .end()
     }
@@ -60,7 +61,7 @@ const contactAdministratorValidator = [
       logger.info('Refusing a contact form by %s: already sent one recently.', req.ip)
 
       return res
-        .status(403)
+        .status(HttpStatusCode.FORBIDDEN_403)
         .send({ error: 'You already sent a contact form recently.' })
         .end()
     }
diff --git a/server/middlewares/validators/themes.ts b/server/middlewares/validators/themes.ts
index 82794656d..a726a567b 100644
--- a/server/middlewares/validators/themes.ts
+++ b/server/middlewares/validators/themes.ts
@@ -5,6 +5,7 @@ import { areValidationErrors } from './utils'
 import { isPluginNameValid, isPluginVersionValid } from '../../helpers/custom-validators/plugins'
 import { PluginManager } from '../../lib/plugins/plugin-manager'
 import { isSafePath } from '../../helpers/custom-validators/misc'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const serveThemeCSSValidator = [
   param('themeName').custom(isPluginNameValid).withMessage('Should have a valid theme name'),
@@ -19,11 +20,11 @@ const serveThemeCSSValidator = [
     const theme = PluginManager.Instance.getRegisteredThemeByShortName(req.params.themeName)
 
     if (!theme || theme.version !== req.params.themeVersion) {
-      return res.sendStatus(404)
+      return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
     }
 
     if (theme.css.includes(req.params.staticEndpoint) === false) {
-      return res.sendStatus(404)
+      return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
     }
 
     res.locals.registeredPlugin = theme
diff --git a/server/middlewares/validators/user-subscriptions.ts b/server/middlewares/validators/user-subscriptions.ts
index a54ecb704..0d0c8ccbf 100644
--- a/server/middlewares/validators/user-subscriptions.ts
+++ b/server/middlewares/validators/user-subscriptions.ts
@@ -6,6 +6,7 @@ import { ActorFollowModel } from '../../models/activitypub/actor-follow'
 import { areValidActorHandles, isValidActorHandle } from '../../helpers/custom-validators/activitypub/actor'
 import { toArray } from '../../helpers/custom-validators/misc'
 import { WEBSERVER } from '../../initializers/constants'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const userSubscriptionListValidator = [
   query('search').optional().not().isEmpty().withMessage('Should have a valid search'),
@@ -61,7 +62,7 @@ const userSubscriptionGetValidator = [
 
     if (!subscription || !subscription.ActorFollowing.VideoChannel) {
       return res
-        .status(404)
+        .status(HttpStatusCode.NOT_FOUND_404)
         .json({
           error: `Subscription ${req.params.uri} not found.`
         })
diff --git a/server/middlewares/validators/users.ts b/server/middlewares/validators/users.ts
index c91c378b3..c93895f2f 100644
--- a/server/middlewares/validators/users.ts
+++ b/server/middlewares/validators/users.ts
@@ -37,6 +37,7 @@ import { doesVideoExist } from '../../helpers/middlewares'
 import { UserRole } from '../../../shared/models/users'
 import { MUserDefault } from '@server/types/models'
 import { Hooks } from '@server/lib/plugins/hooks'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const usersListValidator = [
   query('blocked')
@@ -73,19 +74,22 @@ const usersAddValidator = [
 
     const authUser = res.locals.oauth.token.User
     if (authUser.role !== UserRole.ADMINISTRATOR && req.body.role !== UserRole.USER) {
-      return res.status(403)
+      return res
+        .status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'You can only create users (and not administrators or moderators)' })
     }
 
     if (req.body.channelName) {
       if (req.body.channelName === req.body.username) {
-        return res.status(400)
+        return res
+          .status(HttpStatusCode.BAD_REQUEST_400)
           .json({ error: 'Channel name cannot be the same as user username.' })
       }
 
       const existing = await ActorModel.loadLocalByName(req.body.channelName)
       if (existing) {
-        return res.status(409)
+        return res
+          .status(HttpStatusCode.CONFLICT_409)
           .json({ error: `Channel with name ${req.body.channelName} already exists.` })
       }
     }
@@ -118,18 +122,19 @@ const usersRegisterValidator = [
     const body: UserRegister = req.body
     if (body.channel) {
       if (!body.channel.name || !body.channel.displayName) {
-        return res.status(400)
+        return res
+          .status(HttpStatusCode.BAD_REQUEST_400)
           .json({ error: 'Channel is optional but if you specify it, channel.name and channel.displayName are required.' })
       }
 
       if (body.channel.name === body.username) {
-        return res.status(400)
+        return res.status(HttpStatusCode.BAD_REQUEST_400)
                   .json({ error: 'Channel name cannot be the same as user username.' })
       }
 
       const existing = await ActorModel.loadLocalByName(body.channel.name)
       if (existing) {
-        return res.status(409)
+        return res.status(HttpStatusCode.CONFLICT_409)
                   .json({ error: `Channel with name ${body.channel.name} already exists.` })
       }
     }
@@ -149,7 +154,7 @@ const usersRemoveValidator = [
 
     const user = res.locals.user
     if (user.username === 'root') {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({ error: 'Cannot remove the root user' })
     }
 
@@ -169,7 +174,7 @@ const usersBlockingValidator = [
 
     const user = res.locals.user
     if (user.username === 'root') {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({ error: 'Cannot block the root user' })
     }
 
@@ -181,7 +186,7 @@ const deleteMeValidator = [
   (req: express.Request, res: express.Response, next: express.NextFunction) => {
     const user = res.locals.oauth.token.User
     if (user.username === 'root') {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({ error: 'You cannot delete your root account.' })
                 .end()
     }
@@ -211,8 +216,8 @@ const usersUpdateValidator = [
 
     const user = res.locals.user
     if (user.username === 'root' && req.body.role !== undefined && user.role !== req.body.role) {
-      return res.status(400)
-        .json({ error: 'Cannot change root role.' })
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
+                .json({ error: 'Cannot change root role.' })
     }
 
     return next()
@@ -267,17 +272,17 @@ const usersUpdateMeValidator = [
 
     if (req.body.password || req.body.email) {
       if (user.pluginAuth !== null) {
-        return res.status(400)
+        return res.status(HttpStatusCode.BAD_REQUEST_400)
                   .json({ error: 'You cannot update your email or password that is associated with an external auth system.' })
       }
 
       if (!req.body.currentPassword) {
-        return res.status(400)
+        return res.status(HttpStatusCode.BAD_REQUEST_400)
                   .json({ error: 'currentPassword parameter is missing.' })
       }
 
       if (await user.isPasswordMatch(req.body.currentPassword) !== true) {
-        return res.status(401)
+        return res.status(HttpStatusCode.UNAUTHORIZED_401)
                   .json({ error: 'currentPassword is invalid.' })
       }
     }
@@ -329,7 +334,7 @@ const ensureUserRegistrationAllowed = [
     )
 
     if (allowedResult.allowed === false) {
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
                 .json({ error: allowedResult.errorMessage || 'User registration is not enabled or user limit is reached.' })
     }
 
@@ -342,7 +347,7 @@ const ensureUserRegistrationAllowedForIP = [
     const allowed = isSignupAllowedForCurrentIP(req.ip)
 
     if (allowed === false) {
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
                 .json({ error: 'You are not on a network authorized for registration.' })
     }
 
@@ -362,7 +367,7 @@ const usersAskResetPasswordValidator = [
     if (!exists) {
       logger.debug('User with email %s does not exist (asking reset password).', req.body.email)
       // Do not leak our emails
-      return res.status(204).end()
+      return res.status(HttpStatusCode.NO_CONTENT_204).end()
     }
 
     return next()
@@ -385,7 +390,7 @@ const usersResetPasswordValidator = [
 
     if (redisVerificationString !== req.body.verificationString) {
       return res
-        .status(403)
+        .status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'Invalid verification string.' })
     }
 
@@ -404,7 +409,7 @@ const usersAskSendVerifyEmailValidator = [
     if (!exists) {
       logger.debug('User with email %s does not exist (asking verify email).', req.body.email)
       // Do not leak our emails
-      return res.status(204).end()
+      return res.status(HttpStatusCode.NO_CONTENT_204).end()
     }
 
     return next()
@@ -432,7 +437,7 @@ const usersVerifyEmailValidator = [
 
     if (redisVerificationString !== req.body.verificationString) {
       return res
-        .status(403)
+        .status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'Invalid verification string.' })
     }
 
@@ -449,7 +454,7 @@ const ensureAuthUserOwnsAccountValidator = [
     const user = res.locals.oauth.token.User
 
     if (res.locals.account.id !== user.Account.id) {
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
                 .json({ error: 'Only owner can access ratings list.' })
     }
 
@@ -465,7 +470,7 @@ const ensureCanManageUser = [
     if (authUser.role === UserRole.ADMINISTRATOR) return next()
     if (authUser.role === UserRole.MODERATOR && onUser.role === UserRole.USER) return next()
 
-    return res.status(403)
+    return res.status(HttpStatusCode.FORBIDDEN_403)
       .json({ error: 'A moderator can only manager users.' })
   }
 ]
@@ -509,14 +514,14 @@ async function checkUserNameOrEmailDoesNotAlreadyExist (username: string, email:
   const user = await UserModel.loadByUsernameOrEmail(username, email)
 
   if (user) {
-    res.status(409)
+    res.status(HttpStatusCode.CONFLICT_409)
               .json({ error: 'User with this username or email already exists.' })
     return false
   }
 
   const actor = await ActorModel.loadLocalByName(username)
   if (actor) {
-    res.status(409)
+    res.status(HttpStatusCode.CONFLICT_409)
        .json({ error: 'Another actor (account/channel) with this name on this instance already exists or has already existed.' })
     return false
   }
@@ -529,7 +534,7 @@ async function checkUserExist (finder: () => Bluebird<MUserDefault>, res: expres
 
   if (!user) {
     if (abortResponse === true) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
         .json({ error: 'User not found' })
     }
 
diff --git a/server/middlewares/validators/utils.ts b/server/middlewares/validators/utils.ts
index 43e5652fa..2899bed6f 100644
--- a/server/middlewares/validators/utils.ts
+++ b/server/middlewares/validators/utils.ts
@@ -1,13 +1,15 @@
 import * as express from 'express'
 import { query, validationResult } from 'express-validator'
 import { logger } from '../../helpers/logger'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 function areValidationErrors (req: express.Request, res: express.Response) {
   const errors = validationResult(req)
 
   if (!errors.isEmpty()) {
     logger.warn('Incorrect request parameters', { path: req.originalUrl, err: errors.mapped() })
-    res.status(400).json({ errors: errors.mapped() })
+    res.status(HttpStatusCode.BAD_REQUEST_400)
+       .json({ errors: errors.mapped() })
 
     return true
   }
diff --git a/server/middlewares/validators/videos/video-blacklist.ts b/server/middlewares/validators/videos/video-blacklist.ts
index 808fefc25..88c788a43 100644
--- a/server/middlewares/validators/videos/video-blacklist.ts
+++ b/server/middlewares/validators/videos/video-blacklist.ts
@@ -5,6 +5,7 @@ import { isVideoBlacklistReasonValid, isVideoBlacklistTypeValid } from '../../..
 import { logger } from '../../../helpers/logger'
 import { doesVideoBlacklistExist, doesVideoExist } from '../../../helpers/middlewares'
 import { areValidationErrors } from '../utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const videosBlacklistRemoveValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid videoId'),
@@ -39,7 +40,7 @@ const videosBlacklistAddValidator = [
     const video = res.locals.videoAll
     if (req.body.unfederate === true && video.remote === true) {
       return res
-        .status(409)
+        .status(HttpStatusCode.CONFLICT_409)
         .send({ error: 'You cannot unfederate a remote video.' })
         .end()
     }
diff --git a/server/middlewares/validators/videos/video-channels.ts b/server/middlewares/validators/videos/video-channels.ts
index 2e4e755e7..57ac548b9 100644
--- a/server/middlewares/validators/videos/video-channels.ts
+++ b/server/middlewares/validators/videos/video-channels.ts
@@ -15,6 +15,7 @@ import { doesLocalVideoChannelNameExist, doesVideoChannelNameWithHostExist } fro
 import { ActorModel } from '../../../models/activitypub/actor'
 import { VideoChannelModel } from '../../../models/video/video-channel'
 import { areValidationErrors } from '../utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const videoChannelsAddValidator = [
   body('name').custom(isActorPreferredUsernameValid).withMessage('Should have a valid channel name'),
@@ -29,7 +30,7 @@ const videoChannelsAddValidator = [
 
     const actor = await ActorModel.loadLocalByName(req.body.name)
     if (actor) {
-      res.status(409)
+      res.status(HttpStatusCode.CONFLICT_409)
          .send({ error: 'Another actor (account/channel) with this name on this instance already exists or has already existed.' })
          .end()
       return false
@@ -37,7 +38,7 @@ const videoChannelsAddValidator = [
 
     const count = await VideoChannelModel.countByAccount(res.locals.oauth.token.User.Account.id)
     if (count >= VIDEO_CHANNELS.MAX_PER_USER) {
-      res.status(400)
+      res.status(HttpStatusCode.BAD_REQUEST_400)
         .send({ error: `You cannot create more than ${VIDEO_CHANNELS.MAX_PER_USER} channels` })
         .end()
       return false
@@ -70,13 +71,13 @@ const videoChannelsUpdateValidator = [
 
     // We need to make additional checks
     if (res.locals.videoChannel.Actor.isOwned() === false) {
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'Cannot update video channel of another server' })
         .end()
     }
 
     if (res.locals.videoChannel.Account.userId !== res.locals.oauth.token.User.id) {
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'Cannot update video channel of another user' })
         .end()
     }
@@ -155,7 +156,7 @@ export {
 
 function checkUserCanDeleteVideoChannel (user: MUser, videoChannel: MChannelAccountDefault, res: express.Response) {
   if (videoChannel.Actor.isOwned() === false) {
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
               .json({ error: 'Cannot remove video channel of another server.' })
               .end()
 
@@ -166,7 +167,7 @@ function checkUserCanDeleteVideoChannel (user: MUser, videoChannel: MChannelAcco
   // The user can delete it if s/he is an admin
   // Or if s/he is the video channel's account
   if (user.hasRight(UserRight.REMOVE_ANY_VIDEO_CHANNEL) === false && videoChannel.Account.userId !== user.id) {
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
               .json({ error: 'Cannot remove video channel of another user' })
               .end()
 
@@ -180,9 +181,9 @@ async function checkVideoChannelIsNotTheLastOne (res: express.Response) {
   const count = await VideoChannelModel.countByAccount(res.locals.oauth.token.User.Account.id)
 
   if (count <= 1) {
-    res.status(409)
-      .json({ error: 'Cannot remove the last channel of this user' })
-      .end()
+    res.status(HttpStatusCode.CONFLICT_409)
+       .json({ error: 'Cannot remove the last channel of this user' })
+       .end()
 
     return false
   }
diff --git a/server/middlewares/validators/videos/video-comments.ts b/server/middlewares/validators/videos/video-comments.ts
index a3c9febc4..226c9d436 100644
--- a/server/middlewares/validators/videos/video-comments.ts
+++ b/server/middlewares/validators/videos/video-comments.ts
@@ -14,6 +14,7 @@ import { AcceptResult, isLocalVideoCommentReplyAccepted, isLocalVideoThreadAccep
 import { Hooks } from '../../../lib/plugins/hooks'
 import { MCommentOwnerVideoReply, MVideo, MVideoFullLight } from '../../../types/models/video'
 import { areValidationErrors } from '../utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const listVideoCommentsValidator = [
   query('isLocal')
@@ -154,8 +155,8 @@ export {
 
 function isVideoCommentsEnabled (video: MVideo, res: express.Response) {
   if (video.commentsEnabled !== true) {
-    res.status(409)
-      .json({ error: 'Video comments are disabled for this video.' })
+    res.status(HttpStatusCode.CONFLICT_409)
+       .json({ error: 'Video comments are disabled for this video.' })
 
     return false
   }
@@ -165,8 +166,8 @@ function isVideoCommentsEnabled (video: MVideo, res: express.Response) {
 
 function checkUserCanDeleteVideoComment (user: MUserAccountUrl, videoComment: MCommentOwnerVideoReply, res: express.Response) {
   if (videoComment.isDeleted()) {
-    res.status(409)
-      .json({ error: 'This comment is already deleted' })
+    res.status(HttpStatusCode.CONFLICT_409)
+       .json({ error: 'This comment is already deleted' })
 
     return false
   }
@@ -178,7 +179,7 @@ function checkUserCanDeleteVideoComment (user: MUserAccountUrl, videoComment: MC
     videoComment.accountId !== userAccount.id && // Not the comment owner
     videoComment.Video.VideoChannel.accountId !== userAccount.id // Not the video owner
   ) {
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
       .json({ error: 'Cannot remove video comment of another user' })
 
     return false
@@ -214,7 +215,7 @@ async function isVideoCommentAccepted (req: express.Request, res: express.Respon
 
   if (!acceptedResult || acceptedResult.accepted !== true) {
     logger.info('Refused local comment.', { acceptedResult, acceptParameters })
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: acceptedResult.errorMessage || 'Refused local comment' })
 
     return false
diff --git a/server/middlewares/validators/videos/video-imports.ts b/server/middlewares/validators/videos/video-imports.ts
index d69aff118..0d41933a6 100644
--- a/server/middlewares/validators/videos/video-imports.ts
+++ b/server/middlewares/validators/videos/video-imports.ts
@@ -13,6 +13,7 @@ import { CONFIG } from '../../../initializers/config'
 import { CONSTRAINTS_FIELDS } from '../../../initializers/constants'
 import { areValidationErrors } from '../utils'
 import { getCommonVideoEditAttributes } from './videos'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const videoImportAddValidator = getCommonVideoEditAttributes().concat([
   body('channelId')
@@ -44,14 +45,14 @@ const videoImportAddValidator = getCommonVideoEditAttributes().concat([
 
     if (req.body.targetUrl && CONFIG.IMPORT.VIDEOS.HTTP.ENABLED !== true) {
       cleanUpReqFiles(req)
-      return res.status(409)
+      return res.status(HttpStatusCode.CONFLICT_409)
         .json({ error: 'HTTP import is not enabled on this instance.' })
         .end()
     }
 
     if (CONFIG.IMPORT.VIDEOS.TORRENT.ENABLED !== true && (req.body.magnetUri || torrentFile)) {
       cleanUpReqFiles(req)
-      return res.status(409)
+      return res.status(HttpStatusCode.CONFLICT_409)
                 .json({ error: 'Torrent/magnet URI import is not enabled on this instance.' })
                 .end()
     }
@@ -62,7 +63,7 @@ const videoImportAddValidator = getCommonVideoEditAttributes().concat([
     if (!req.body.targetUrl && !req.body.magnetUri && !torrentFile) {
       cleanUpReqFiles(req)
 
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
         .json({ error: 'Should have a magnetUri or a targetUrl or a torrent file.' })
         .end()
     }
@@ -100,7 +101,7 @@ async function isImportAccepted (req: express.Request, res: express.Response) {
 
   if (!acceptedResult || acceptedResult.accepted !== true) {
     logger.info('Refused to import video.', { acceptedResult, acceptParameters })
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: acceptedResult.errorMessage || 'Refused to import video' })
 
     return false
diff --git a/server/middlewares/validators/videos/video-live.ts b/server/middlewares/validators/videos/video-live.ts
index 69a14ccb1..3a73e1272 100644
--- a/server/middlewares/validators/videos/video-live.ts
+++ b/server/middlewares/validators/videos/video-live.ts
@@ -13,6 +13,7 @@ import { getCommonVideoEditAttributes } from './videos'
 import { VideoModel } from '@server/models/video/video'
 import { Hooks } from '@server/lib/plugins/hooks'
 import { isLocalLiveVideoAccepted } from '@server/lib/moderation'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const videoLiveGetValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid videoId'),
@@ -28,7 +29,7 @@ const videoLiveGetValidator = [
     if (!checkUserCanManageVideo(user, res.locals.videoAll, UserRight.GET_ANY_LIVE, res, false)) return
 
     const videoLive = await VideoLiveModel.loadByVideoId(res.locals.videoAll.id)
-    if (!videoLive) return res.sendStatus(404)
+    if (!videoLive) return res.sendStatus(HttpStatusCode.NOT_FOUND_404)
 
     res.locals.videoLive = videoLive
 
@@ -62,21 +63,21 @@ const videoLiveAddValidator = getCommonVideoEditAttributes().concat([
     if (CONFIG.LIVE.ENABLED !== true) {
       cleanUpReqFiles(req)
 
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'Live is not enabled on this instance' })
     }
 
     if (CONFIG.LIVE.ALLOW_REPLAY !== true && req.body.saveReplay === true) {
       cleanUpReqFiles(req)
 
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'Saving live replay is not allowed instance' })
     }
 
     if (req.body.permanentLive && req.body.saveReplay) {
       cleanUpReqFiles(req)
 
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
         .json({ error: 'Cannot set this live as permanent while saving its replay' })
     }
 
@@ -89,7 +90,7 @@ const videoLiveAddValidator = getCommonVideoEditAttributes().concat([
       if (totalInstanceLives >= CONFIG.LIVE.MAX_INSTANCE_LIVES) {
         cleanUpReqFiles(req)
 
-        return res.status(403)
+        return res.status(HttpStatusCode.FORBIDDEN_403)
           .json({
             code: ServerErrorCode.MAX_INSTANCE_LIVES_LIMIT_REACHED,
             error: 'Cannot create this live because the max instance lives limit is reached.'
@@ -103,7 +104,7 @@ const videoLiveAddValidator = getCommonVideoEditAttributes().concat([
       if (totalUserLives >= CONFIG.LIVE.MAX_USER_LIVES) {
         cleanUpReqFiles(req)
 
-        return res.status(403)
+        return res.status(HttpStatusCode.FORBIDDEN_403)
           .json({
             code: ServerErrorCode.MAX_USER_LIVES_LIMIT_REACHED,
             error: 'Cannot create this live because the max user lives limit is reached.'
@@ -129,17 +130,17 @@ const videoLiveUpdateValidator = [
     if (areValidationErrors(req, res)) return
 
     if (req.body.permanentLive && req.body.saveReplay) {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
         .json({ error: 'Cannot set this live as permanent while saving its replay' })
     }
 
     if (CONFIG.LIVE.ALLOW_REPLAY !== true && req.body.saveReplay === true) {
-      return res.status(403)
+      return res.status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'Saving live replay is not allowed instance' })
     }
 
     if (res.locals.videoAll.state !== VideoState.WAITING_FOR_LIVE) {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
         .json({ error: 'Cannot update a live that has already started' })
     }
 
@@ -176,7 +177,7 @@ async function isLiveVideoAccepted (req: express.Request, res: express.Response)
   if (!acceptedResult || acceptedResult.accepted !== true) {
     logger.info('Refused local live video.', { acceptedResult, acceptParameters })
 
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: acceptedResult.errorMessage || 'Refused local live video' })
 
     return false
diff --git a/server/middlewares/validators/videos/video-playlists.ts b/server/middlewares/validators/videos/video-playlists.ts
index 4647eae44..c7a6f68e3 100644
--- a/server/middlewares/validators/videos/video-playlists.ts
+++ b/server/middlewares/validators/videos/video-playlists.ts
@@ -29,6 +29,7 @@ import { VideoPlaylistType } from '../../../../shared/models/videos/playlist/vid
 import { doesVideoChannelIdExist, doesVideoExist, doesVideoPlaylistExist, VideoPlaylistFetchType } from '../../../helpers/middlewares'
 import { MVideoPlaylist } from '../../../types/models/video/video-playlist'
 import { MUserAccountId } from '@server/types/models'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const videoPlaylistsAddValidator = getCommonPlaylistEditAttributes().concat([
   body('displayName')
@@ -44,7 +45,7 @@ const videoPlaylistsAddValidator = getCommonPlaylistEditAttributes().concat([
 
     if (body.privacy === VideoPlaylistPrivacy.PUBLIC && !body.videoChannelId) {
       cleanUpReqFiles(req)
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({ error: 'Cannot set "public" a playlist that is not assigned to a channel.' })
     }
 
@@ -83,13 +84,13 @@ const videoPlaylistsUpdateValidator = getCommonPlaylistEditAttributes().concat([
       )
     ) {
       cleanUpReqFiles(req)
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({ error: 'Cannot set "public" a playlist that is not assigned to a channel.' })
     }
 
     if (videoPlaylist.type === VideoPlaylistType.WATCH_LATER) {
       cleanUpReqFiles(req)
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({ error: 'Cannot update a watch later playlist.' })
     }
 
@@ -112,7 +113,7 @@ const videoPlaylistsDeleteValidator = [
 
     const videoPlaylist = getPlaylist(res)
     if (videoPlaylist.type === VideoPlaylistType.WATCH_LATER) {
-      return res.status(400)
+      return res.status(HttpStatusCode.BAD_REQUEST_400)
                 .json({ error: 'Cannot delete a watch later playlist.' })
     }
 
@@ -142,7 +143,7 @@ const videoPlaylistsGetValidator = (fetchType: VideoPlaylistFetchType) => {
       if (videoPlaylist.privacy === VideoPlaylistPrivacy.UNLISTED) {
         if (isUUIDValid(req.params.playlistId)) return next()
 
-        return res.status(404).end()
+        return res.status(HttpStatusCode.NOT_FOUND_404).end()
       }
 
       if (videoPlaylist.privacy === VideoPlaylistPrivacy.PRIVATE) {
@@ -154,7 +155,7 @@ const videoPlaylistsGetValidator = (fetchType: VideoPlaylistFetchType) => {
           !user ||
           (videoPlaylist.OwnerAccount.id !== user.Account.id && !user.hasRight(UserRight.UPDATE_ANY_VIDEO_PLAYLIST))
         ) {
-          return res.status(403)
+          return res.status(HttpStatusCode.FORBIDDEN_403)
                     .json({ error: 'Cannot get this private video playlist.' })
         }
 
@@ -231,7 +232,7 @@ const videoPlaylistsUpdateOrRemoveVideoValidator = [
 
     const videoPlaylistElement = await VideoPlaylistElementModel.loadById(req.params.playlistElementId)
     if (!videoPlaylistElement) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
          .json({ error: 'Video playlist element not found' })
          .end()
 
@@ -261,7 +262,7 @@ const videoPlaylistElementAPGetValidator = [
 
     const videoPlaylistElement = await VideoPlaylistElementModel.loadByPlaylistAndElementIdForAP(playlistId, playlistElementId)
     if (!videoPlaylistElement) {
-      res.status(404)
+      res.status(HttpStatusCode.NOT_FOUND_404)
          .json({ error: 'Video playlist element not found' })
          .end()
 
@@ -269,7 +270,7 @@ const videoPlaylistElementAPGetValidator = [
     }
 
     if (videoPlaylistElement.VideoPlaylist.privacy === VideoPlaylistPrivacy.PRIVATE) {
-      return res.status(403).end()
+      return res.status(HttpStatusCode.FORBIDDEN_403).end()
     }
 
     res.locals.videoPlaylistElementAP = videoPlaylistElement
@@ -305,7 +306,7 @@ const videoPlaylistsReorderVideosValidator = [
     const reorderLength: number = req.body.reorderLength
 
     if (startPosition >= nextPosition || insertAfterPosition >= nextPosition) {
-      res.status(400)
+      res.status(HttpStatusCode.BAD_REQUEST_400)
          .json({ error: `Start position or insert after position exceed the playlist limits (max: ${nextPosition - 1})` })
          .end()
 
@@ -313,7 +314,7 @@ const videoPlaylistsReorderVideosValidator = [
     }
 
     if (reorderLength && reorderLength + startPosition > nextPosition) {
-      res.status(400)
+      res.status(HttpStatusCode.BAD_REQUEST_400)
          .json({ error: `Reorder length with this start position exceeds the playlist limits (max: ${nextPosition - startPosition})` })
          .end()
 
@@ -399,7 +400,7 @@ function getCommonPlaylistEditAttributes () {
 
 function checkUserCanManageVideoPlaylist (user: MUserAccountId, videoPlaylist: MVideoPlaylist, right: UserRight, res: express.Response) {
   if (videoPlaylist.isOwned() === false) {
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: 'Cannot manage video playlist of another server.' })
        .end()
 
@@ -410,7 +411,7 @@ function checkUserCanManageVideoPlaylist (user: MUserAccountId, videoPlaylist: M
   // The user can delete it if s/he is an admin
   // Or if s/he is the video playlist's owner
   if (user.hasRight(right) === false && videoPlaylist.ownerAccountId !== user.Account.id) {
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: 'Cannot manage video playlist of another user' })
        .end()
 
diff --git a/server/middlewares/validators/videos/video-rates.ts b/server/middlewares/validators/videos/video-rates.ts
index 15a8c7983..7dcba15f1 100644
--- a/server/middlewares/validators/videos/video-rates.ts
+++ b/server/middlewares/validators/videos/video-rates.ts
@@ -9,6 +9,7 @@ import { AccountVideoRateModel } from '../../../models/account/account-video-rat
 import { VideoRateType } from '../../../../shared/models/videos'
 import { isAccountNameValid } from '../../../helpers/custom-validators/accounts'
 import { doesVideoExist } from '../../../helpers/middlewares'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const videoUpdateRateValidator = [
   param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
@@ -36,7 +37,7 @@ const getAccountVideoRateValidatorFactory = function (rateType: VideoRateType) {
 
       const rate = await AccountVideoRateModel.loadLocalAndPopulateVideo(rateType, req.params.name, req.params.videoId)
       if (!rate) {
-        return res.status(404)
+        return res.status(HttpStatusCode.NOT_FOUND_404)
                   .json({ error: 'Video rate not found' })
       }
 
diff --git a/server/middlewares/validators/videos/video-shares.ts b/server/middlewares/validators/videos/video-shares.ts
index 20fc96243..f0d8e0c36 100644
--- a/server/middlewares/validators/videos/video-shares.ts
+++ b/server/middlewares/validators/videos/video-shares.ts
@@ -5,6 +5,7 @@ import { logger } from '../../../helpers/logger'
 import { VideoShareModel } from '../../../models/video/video-share'
 import { areValidationErrors } from '../utils'
 import { doesVideoExist } from '../../../helpers/middlewares'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const videosShareValidator = [
   param('id').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
@@ -20,7 +21,7 @@ const videosShareValidator = [
 
     const share = await VideoShareModel.load(req.params.actorId, video.id)
     if (!share) {
-      return res.status(404)
+      return res.status(HttpStatusCode.NOT_FOUND_404)
                 .end()
     }
 
diff --git a/server/middlewares/validators/videos/video-watch.ts b/server/middlewares/validators/videos/video-watch.ts
index d6ca1d341..29ce0dab6 100644
--- a/server/middlewares/validators/videos/video-watch.ts
+++ b/server/middlewares/validators/videos/video-watch.ts
@@ -4,6 +4,7 @@ import { isIdOrUUIDValid, toIntOrNull } from '../../../helpers/custom-validators
 import { areValidationErrors } from '../utils'
 import { logger } from '../../../helpers/logger'
 import { doesVideoExist } from '../../../helpers/middlewares'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const videoWatchingValidator = [
   param('videoId').custom(isIdOrUUIDValid).not().isEmpty().withMessage('Should have a valid id'),
@@ -20,7 +21,7 @@ const videoWatchingValidator = [
     const user = res.locals.oauth.token.User
     if (user.videosHistoryEnabled === false) {
       logger.warn('Cannot set videos to watch by user %d: videos history is disabled.', user.id)
-      return res.status(409).end()
+      return res.status(HttpStatusCode.CONFLICT_409).end()
     }
 
     return next()
diff --git a/server/middlewares/validators/videos/videos.ts b/server/middlewares/validators/videos/videos.ts
index af0072d73..9834f714b 100644
--- a/server/middlewares/validators/videos/videos.ts
+++ b/server/middlewares/validators/videos/videos.ts
@@ -51,6 +51,7 @@ import { AccountModel } from '../../../models/account/account'
 import { VideoModel } from '../../../models/video/video'
 import { authenticatePromiseIfNeeded } from '../../oauth'
 import { areValidationErrors } from '../utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const videosAddValidator = getCommonVideoEditAttributes().concat([
   body('videofile')
@@ -75,7 +76,7 @@ const videosAddValidator = getCommonVideoEditAttributes().concat([
     if (!await doesVideoChannelOfAccountExist(req.body.channelId, user, res)) return cleanUpReqFiles(req)
 
     if (await isAbleToUploadVideo(user.id, videoFile.size) === false) {
-      res.status(403)
+      res.status(HttpStatusCode.FORBIDDEN_403)
          .json({ error: 'The user video quota is exceeded with this video.' })
 
       return cleanUpReqFiles(req)
@@ -87,7 +88,7 @@ const videosAddValidator = getCommonVideoEditAttributes().concat([
       duration = await getDurationFromVideoFile(videoFile.path)
     } catch (err) {
       logger.error('Invalid input file in videosAddValidator.', { err })
-      res.status(400)
+      res.status(HttpStatusCode.BAD_REQUEST_400)
          .json({ error: 'Invalid input file.' })
 
       return cleanUpReqFiles(req)
@@ -147,7 +148,7 @@ async function checkVideoFollowConstraints (req: express.Request, res: express.R
   const serverActor = await getServerActor()
   if (await VideoModel.checkVideoHasInstanceFollow(video.id, serverActor.id) === true) return next()
 
-  return res.status(403)
+  return res.status(HttpStatusCode.FORBIDDEN_403)
             .json({
               errorCode: ServerErrorCode.DOES_NOT_RESPECT_FOLLOW_CONSTRAINTS,
               error: 'Cannot get this video regarding follow constraints.',
@@ -182,7 +183,7 @@ const videosCustomGetValidator = (
 
         // Only the owner or a user that have blacklist rights can see the video
         if (!user || !user.canGetVideo(videoAll)) {
-          return res.status(403)
+          return res.status(HttpStatusCode.FORBIDDEN_403)
                     .json({ error: 'Cannot get this private/internal or blacklisted video.' })
         }
 
@@ -197,7 +198,7 @@ const videosCustomGetValidator = (
         if (isUUIDValid(req.params.id)) return next()
 
         // Don't leak this unlisted video
-        return res.status(404).end()
+        return res.status(HttpStatusCode.NOT_FOUND_404).end()
       }
     }
   ]
@@ -250,7 +251,7 @@ const videosChangeOwnershipValidator = [
 
     const nextOwner = await AccountModel.loadLocalByName(req.body.username)
     if (!nextOwner) {
-      res.status(400)
+      res.status(HttpStatusCode.BAD_REQUEST_400)
         .json({ error: 'Changing video ownership to a remote account is not supported yet' })
 
       return
@@ -276,7 +277,7 @@ const videosTerminateChangeOwnershipValidator = [
     const videoChangeOwnership = res.locals.videoChangeOwnership
 
     if (videoChangeOwnership.status !== VideoChangeOwnershipStatus.WAITING) {
-      res.status(403)
+      res.status(HttpStatusCode.FORBIDDEN_403)
          .json({ error: 'Ownership already accepted or refused' })
       return
     }
@@ -294,7 +295,7 @@ const videosAcceptChangeOwnershipValidator = [
     const videoChangeOwnership = res.locals.videoChangeOwnership
     const isAble = await isAbleToUploadVideo(user.id, videoChangeOwnership.Video.getMaxQualityFile().size)
     if (isAble === false) {
-      res.status(403)
+      res.status(HttpStatusCode.FORBIDDEN_403)
         .json({ error: 'The user video quota is exceeded with this video.' })
 
       return
@@ -433,7 +434,7 @@ const commonVideosFiltersValidator = [
       (req.query.filter === 'all-local' || req.query.filter === 'all') &&
       (!user || user.hasRight(UserRight.SEE_ALL_VIDEOS) === false)
     ) {
-      res.status(401)
+      res.status(HttpStatusCode.UNAUTHORIZED_401)
          .json({ error: 'You are not allowed to see all local videos.' })
 
       return
@@ -473,7 +474,7 @@ function areErrorsInScheduleUpdate (req: express.Request, res: express.Response)
     if (!req.body.scheduleUpdate.updateAt) {
       logger.warn('Invalid parameters: scheduleUpdate.updateAt is mandatory.')
 
-      res.status(400)
+      res.status(HttpStatusCode.BAD_REQUEST_400)
          .json({ error: 'Schedule update at is mandatory.' })
 
       return true
@@ -498,7 +499,7 @@ async function isVideoAccepted (req: express.Request, res: express.Response, vid
 
   if (!acceptedResult || acceptedResult.accepted !== true) {
     logger.info('Refused local video.', { acceptedResult, acceptParameters })
-    res.status(403)
+    res.status(HttpStatusCode.FORBIDDEN_403)
        .json({ error: acceptedResult.errorMessage || 'Refused local video' })
 
     return false
diff --git a/server/middlewares/validators/webfinger.ts b/server/middlewares/validators/webfinger.ts
index 5fe864f8b..a71422ed8 100644
--- a/server/middlewares/validators/webfinger.ts
+++ b/server/middlewares/validators/webfinger.ts
@@ -5,6 +5,7 @@ import { logger } from '../../helpers/logger'
 import { ActorModel } from '../../models/activitypub/actor'
 import { areValidationErrors } from './utils'
 import { getHostWithPort } from '../../helpers/express-utils'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const webfingerValidator = [
   query('resource').custom(isWebfingerLocalResourceValid).withMessage('Should have a valid webfinger resource'),
@@ -20,9 +21,9 @@ const webfingerValidator = [
 
     const actor = await ActorModel.loadLocalUrlByName(name)
     if (!actor) {
-      return res.status(404)
-        .send({ error: 'Actor not found' })
-        .end()
+      return res.status(HttpStatusCode.NOT_FOUND_404)
+                .send({ error: 'Actor not found' })
+                .end()
     }
 
     res.locals.actorUrl = actor
diff --git a/server/tests/api/activitypub/security.ts b/server/tests/api/activitypub/security.ts
index e6002b661..55dcced15 100644
--- a/server/tests/api/activitypub/security.ts
+++ b/server/tests/api/activitypub/security.ts
@@ -9,6 +9,7 @@ import * as chai from 'chai'
 import { activityPubContextify, buildSignedActivity } from '../../../helpers/activitypub'
 import { makeFollowRequest, makePOSTAPRequest } from '../../../../shared/extra-utils/requests/activitypub'
 import { buildDigest } from '@server/helpers/peertube-crypto'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -74,7 +75,7 @@ describe('Test ActivityPub security', function () {
 
       const { response } = await makePOSTAPRequest(url, body, baseHttpSignature(), headers)
 
-      expect(response.statusCode).to.equal(403)
+      expect(response.statusCode).to.equal(HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with an invalid date', async function () {
@@ -84,7 +85,7 @@ describe('Test ActivityPub security', function () {
 
       const { response } = await makePOSTAPRequest(url, body, baseHttpSignature(), headers)
 
-      expect(response.statusCode).to.equal(403)
+      expect(response.statusCode).to.equal(HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with bad keys', async function () {
@@ -96,7 +97,7 @@ describe('Test ActivityPub security', function () {
 
       const { response } = await makePOSTAPRequest(url, body, baseHttpSignature(), headers)
 
-      expect(response.statusCode).to.equal(403)
+      expect(response.statusCode).to.equal(HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should reject requests without appropriate signed headers', async function () {
@@ -117,7 +118,7 @@ describe('Test ActivityPub security', function () {
         signatureOptions.headers = badHeaders
 
         const { response } = await makePOSTAPRequest(url, body, signatureOptions, headers)
-        expect(response.statusCode).to.equal(403)
+        expect(response.statusCode).to.equal(HttpStatusCode.FORBIDDEN_403)
       }
     })
 
@@ -127,7 +128,7 @@ describe('Test ActivityPub security', function () {
 
       const { response } = await makePOSTAPRequest(url, body, baseHttpSignature(), headers)
 
-      expect(response.statusCode).to.equal(204)
+      expect(response.statusCode).to.equal(HttpStatusCode.NO_CONTENT_204)
     })
   })
 
@@ -156,7 +157,7 @@ describe('Test ActivityPub security', function () {
 
       const { response } = await makePOSTAPRequest(url, signedBody, baseHttpSignature(), headers)
 
-      expect(response.statusCode).to.equal(403)
+      expect(response.statusCode).to.equal(HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with an altered body', async function () {
@@ -177,7 +178,7 @@ describe('Test ActivityPub security', function () {
 
       const { response } = await makePOSTAPRequest(url, signedBody, baseHttpSignature(), headers)
 
-      expect(response.statusCode).to.equal(403)
+      expect(response.statusCode).to.equal(HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should succeed with a valid signature', async function () {
@@ -193,7 +194,7 @@ describe('Test ActivityPub security', function () {
 
       const { response } = await makePOSTAPRequest(url, signedBody, baseHttpSignature(), headers)
 
-      expect(response.statusCode).to.equal(204)
+      expect(response.statusCode).to.equal(HttpStatusCode.NO_CONTENT_204)
     })
   })
 
diff --git a/server/tests/api/check-params/abuses.ts b/server/tests/api/check-params/abuses.ts
index 8dadd9922..ef6c66b72 100644
--- a/server/tests/api/check-params/abuses.ts
+++ b/server/tests/api/check-params/abuses.ts
@@ -29,6 +29,7 @@ import {
   checkBadSortPagination,
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test abuses API validators', function () {
   const basePath = '/api/v1/abuses/'
@@ -81,7 +82,7 @@ describe('Test abuses API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -90,7 +91,7 @@ describe('Test abuses API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -125,7 +126,7 @@ describe('Test abuses API validators', function () {
         videoIs: 'deleted'
       }
 
-      await makeGetRequest({ url: server.url, path, token: server.accessToken, query, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, token: server.accessToken, query, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -148,7 +149,7 @@ describe('Test abuses API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -167,7 +168,7 @@ describe('Test abuses API validators', function () {
         state: 2
       }
 
-      await makeGetRequest({ url: server.url, path, token: userAccessToken, query, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, token: userAccessToken, query, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -186,7 +187,13 @@ describe('Test abuses API validators', function () {
 
     it('Should fail with an unknown video', async function () {
       const fields = { video: { id: 42 }, reason: 'my super reason' }
-      await makePostBodyRequest({ url: server.url, path: path, token: userAccessToken, fields, statusCodeExpected: 404 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should fail with a wrong comment', async function () {
@@ -196,7 +203,13 @@ describe('Test abuses API validators', function () {
 
     it('Should fail with an unknown comment', async function () {
       const fields = { comment: { id: 42 }, reason: 'my super reason' }
-      await makePostBodyRequest({ url: server.url, path: path, token: userAccessToken, fields, statusCodeExpected: 404 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should fail with a wrong account', async function () {
@@ -206,18 +219,30 @@ describe('Test abuses API validators', function () {
 
     it('Should fail with an unknown account', async function () {
       const fields = { account: { id: 42 }, reason: 'my super reason' }
-      await makePostBodyRequest({ url: server.url, path: path, token: userAccessToken, fields, statusCodeExpected: 404 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should fail with not account, comment or video', async function () {
       const fields = { reason: 'my super reason' }
-      await makePostBodyRequest({ url: server.url, path: path, token: userAccessToken, fields, statusCodeExpected: 400 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
+      })
     })
 
     it('Should fail with a non authenticated user', async function () {
       const fields = { video: { id: server.video.id }, reason: 'my super reason' }
 
-      await makePostBodyRequest({ url: server.url, path, token: 'hello', fields, statusCodeExpected: 401 })
+      await makePostBodyRequest({ url: server.url, path, token: 'hello', fields, statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with a reason too short', async function () {
@@ -235,7 +260,13 @@ describe('Test abuses API validators', function () {
     it('Should succeed with the correct parameters (basic)', async function () {
       const fields: AbuseCreate = { video: { id: server.video.id }, reason: 'my super reason' }
 
-      const res = await makePostBodyRequest({ url: server.url, path, token: userAccessToken, fields, statusCodeExpected: 200 })
+      const res = await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.OK_200
+      })
       abuseId = res.body.abuse.id
     })
 
@@ -268,32 +299,32 @@ describe('Test abuses API validators', function () {
         predefinedReasons: [ 'serverRules' ]
       }
 
-      await makePostBodyRequest({ url: server.url, path, token: userAccessToken, fields, statusCodeExpected: 200 })
+      await makePostBodyRequest({ url: server.url, path, token: userAccessToken, fields, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
   describe('When updating an abuse', function () {
 
     it('Should fail with a non authenticated user', async function () {
-      await updateAbuse(server.url, 'blabla', abuseId, {}, 401)
+      await updateAbuse(server.url, 'blabla', abuseId, {}, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with a non admin user', async function () {
-      await updateAbuse(server.url, userAccessToken, abuseId, {}, 403)
+      await updateAbuse(server.url, userAccessToken, abuseId, {}, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with a bad abuse id', async function () {
-      await updateAbuse(server.url, server.accessToken, 45, {}, 404)
+      await updateAbuse(server.url, server.accessToken, 45, {}, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a bad state', async function () {
       const body = { state: 5 }
-      await updateAbuse(server.url, server.accessToken, abuseId, body, 400)
+      await updateAbuse(server.url, server.accessToken, abuseId, body, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail with a bad moderation comment', async function () {
       const body = { moderationComment: 'b'.repeat(3001) }
-      await updateAbuse(server.url, server.accessToken, abuseId, body, 400)
+      await updateAbuse(server.url, server.accessToken, abuseId, body, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should succeed with the correct params', async function () {
@@ -306,19 +337,19 @@ describe('Test abuses API validators', function () {
     const message = 'my super message'
 
     it('Should fail with an invalid abuse id', async function () {
-      await addAbuseMessage(server.url, userAccessToken2, 888, message, 404)
+      await addAbuseMessage(server.url, userAccessToken2, 888, message, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a non authenticated user', async function () {
-      await addAbuseMessage(server.url, 'fake_token', abuseId, message, 401)
+      await addAbuseMessage(server.url, 'fake_token', abuseId, message, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with an invalid logged in user', async function () {
-      await addAbuseMessage(server.url, userAccessToken2, abuseId, message, 403)
+      await addAbuseMessage(server.url, userAccessToken2, abuseId, message, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with an invalid message', async function () {
-      await addAbuseMessage(server.url, userAccessToken, abuseId, 'a'.repeat(5000), 400)
+      await addAbuseMessage(server.url, userAccessToken, abuseId, 'a'.repeat(5000), HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should suceed with the correct params', async function () {
@@ -330,15 +361,15 @@ describe('Test abuses API validators', function () {
   describe('When listing abuse messages', function () {
 
     it('Should fail with an invalid abuse id', async function () {
-      await listAbuseMessages(server.url, userAccessToken, 888, 404)
+      await listAbuseMessages(server.url, userAccessToken, 888, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a non authenticated user', async function () {
-      await listAbuseMessages(server.url, 'fake_token', abuseId, 401)
+      await listAbuseMessages(server.url, 'fake_token', abuseId, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with an invalid logged in user', async function () {
-      await listAbuseMessages(server.url, userAccessToken2, abuseId, 403)
+      await listAbuseMessages(server.url, userAccessToken2, abuseId, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should succeed with the correct params', async function () {
@@ -349,19 +380,19 @@ describe('Test abuses API validators', function () {
   describe('When deleting an abuse message', function () {
 
     it('Should fail with an invalid abuse id', async function () {
-      await deleteAbuseMessage(server.url, userAccessToken, 888, messageId, 404)
+      await deleteAbuseMessage(server.url, userAccessToken, 888, messageId, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with an invalid message id', async function () {
-      await deleteAbuseMessage(server.url, userAccessToken, abuseId, 888, 404)
+      await deleteAbuseMessage(server.url, userAccessToken, abuseId, 888, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a non authenticated user', async function () {
-      await deleteAbuseMessage(server.url, 'fake_token', abuseId, messageId, 401)
+      await deleteAbuseMessage(server.url, 'fake_token', abuseId, messageId, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with an invalid logged in user', async function () {
-      await deleteAbuseMessage(server.url, userAccessToken2, abuseId, messageId, 403)
+      await deleteAbuseMessage(server.url, userAccessToken2, abuseId, messageId, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should succeed with the correct params', async function () {
@@ -372,15 +403,15 @@ describe('Test abuses API validators', function () {
   describe('When deleting a video abuse', function () {
 
     it('Should fail with a non authenticated user', async function () {
-      await deleteAbuse(server.url, 'blabla', abuseId, 401)
+      await deleteAbuse(server.url, 'blabla', abuseId, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with a non admin user', async function () {
-      await deleteAbuse(server.url, userAccessToken, abuseId, 403)
+      await deleteAbuse(server.url, userAccessToken, abuseId, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with a bad abuse id', async function () {
-      await deleteAbuse(server.url, server.accessToken, 45, 404)
+      await deleteAbuse(server.url, server.accessToken, 45, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should succeed with the correct params', async function () {
@@ -415,11 +446,11 @@ describe('Test abuses API validators', function () {
     })
 
     it('Should fail when listing abuse messages of a remote abuse', async function () {
-      await listAbuseMessages(server.url, server.accessToken, remoteAbuseId, 400)
+      await listAbuseMessages(server.url, server.accessToken, remoteAbuseId, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail when creating abuse message of a remote abuse', async function () {
-      await addAbuseMessage(server.url, server.accessToken, remoteAbuseId, 'message', 400)
+      await addAbuseMessage(server.url, server.accessToken, remoteAbuseId, 'message', HttpStatusCode.BAD_REQUEST_400)
     })
 
     after(async function () {
diff --git a/server/tests/api/check-params/blocklist.ts b/server/tests/api/check-params/blocklist.ts
index 1219ec9bd..5ed8810ce 100644
--- a/server/tests/api/check-params/blocklist.ts
+++ b/server/tests/api/check-params/blocklist.ts
@@ -19,6 +19,7 @@ import {
   checkBadSortPagination,
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test blocklist API validators', function () {
   let servers: ServerInfo[]
@@ -53,7 +54,7 @@ describe('Test blocklist API validators', function () {
           await makeGetRequest({
             url: server.url,
             path,
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -76,7 +77,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path,
             fields: { accountName: 'user1' },
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -86,7 +87,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { accountName: 'user2' },
-            statusCodeExpected: 404
+            statusCodeExpected: HttpStatusCode.NOT_FOUND_404
           })
         })
 
@@ -96,7 +97,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { accountName: 'root' },
-            statusCodeExpected: 409
+            statusCodeExpected: HttpStatusCode.CONFLICT_409
           })
         })
 
@@ -106,7 +107,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { accountName: 'user1' },
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
       })
@@ -116,7 +117,7 @@ describe('Test blocklist API validators', function () {
           await makeDeleteRequest({
             url: server.url,
             path: path + '/user1',
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -125,7 +126,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/user2',
             token: server.accessToken,
-            statusCodeExpected: 404
+            statusCodeExpected: HttpStatusCode.NOT_FOUND_404
           })
         })
 
@@ -134,7 +135,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/user1',
             token: server.accessToken,
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
       })
@@ -148,7 +149,7 @@ describe('Test blocklist API validators', function () {
           await makeGetRequest({
             url: server.url,
             path,
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -171,7 +172,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path,
             fields: { host: 'localhost:9002' },
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -181,7 +182,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { host: 'localhost:9003' },
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
 
@@ -191,7 +192,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { host: 'localhost:' + server.port },
-            statusCodeExpected: 409
+            statusCodeExpected: HttpStatusCode.CONFLICT_409
           })
         })
 
@@ -201,7 +202,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { host: 'localhost:' + servers[1].port },
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
       })
@@ -211,7 +212,7 @@ describe('Test blocklist API validators', function () {
           await makeDeleteRequest({
             url: server.url,
             path: path + '/localhost:' + servers[1].port,
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -220,7 +221,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/localhost:9004',
             token: server.accessToken,
-            statusCodeExpected: 404
+            statusCodeExpected: HttpStatusCode.NOT_FOUND_404
           })
         })
 
@@ -229,7 +230,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/localhost:' + servers[1].port,
             token: server.accessToken,
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
       })
@@ -246,7 +247,7 @@ describe('Test blocklist API validators', function () {
           await makeGetRequest({
             url: server.url,
             path,
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -255,7 +256,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: userAccessToken,
             path,
-            statusCodeExpected: 403
+            statusCodeExpected: HttpStatusCode.FORBIDDEN_403
           })
         })
 
@@ -278,7 +279,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path,
             fields: { accountName: 'user1' },
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -288,7 +289,7 @@ describe('Test blocklist API validators', function () {
             token: userAccessToken,
             path,
             fields: { accountName: 'user1' },
-            statusCodeExpected: 403
+            statusCodeExpected: HttpStatusCode.FORBIDDEN_403
           })
         })
 
@@ -298,7 +299,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { accountName: 'user2' },
-            statusCodeExpected: 404
+            statusCodeExpected: HttpStatusCode.NOT_FOUND_404
           })
         })
 
@@ -308,7 +309,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { accountName: 'root' },
-            statusCodeExpected: 409
+            statusCodeExpected: HttpStatusCode.CONFLICT_409
           })
         })
 
@@ -318,7 +319,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { accountName: 'user1' },
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
       })
@@ -328,7 +329,7 @@ describe('Test blocklist API validators', function () {
           await makeDeleteRequest({
             url: server.url,
             path: path + '/user1',
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -337,7 +338,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/user1',
             token: userAccessToken,
-            statusCodeExpected: 403
+            statusCodeExpected: HttpStatusCode.FORBIDDEN_403
           })
         })
 
@@ -346,7 +347,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/user2',
             token: server.accessToken,
-            statusCodeExpected: 404
+            statusCodeExpected: HttpStatusCode.NOT_FOUND_404
           })
         })
 
@@ -355,7 +356,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/user1',
             token: server.accessToken,
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
       })
@@ -369,7 +370,7 @@ describe('Test blocklist API validators', function () {
           await makeGetRequest({
             url: server.url,
             path,
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -378,7 +379,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: userAccessToken,
             path,
-            statusCodeExpected: 403
+            statusCodeExpected: HttpStatusCode.FORBIDDEN_403
           })
         })
 
@@ -401,7 +402,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path,
             fields: { host: 'localhost:' + servers[1].port },
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -411,7 +412,7 @@ describe('Test blocklist API validators', function () {
             token: userAccessToken,
             path,
             fields: { host: 'localhost:' + servers[1].port },
-            statusCodeExpected: 403
+            statusCodeExpected: HttpStatusCode.FORBIDDEN_403
           })
         })
 
@@ -421,7 +422,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { host: 'localhost:9003' },
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
 
@@ -431,7 +432,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { host: 'localhost:' + server.port },
-            statusCodeExpected: 409
+            statusCodeExpected: HttpStatusCode.CONFLICT_409
           })
         })
 
@@ -441,7 +442,7 @@ describe('Test blocklist API validators', function () {
             token: server.accessToken,
             path,
             fields: { host: 'localhost:' + servers[1].port },
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
       })
@@ -451,7 +452,7 @@ describe('Test blocklist API validators', function () {
           await makeDeleteRequest({
             url: server.url,
             path: path + '/localhost:' + servers[1].port,
-            statusCodeExpected: 401
+            statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
           })
         })
 
@@ -460,7 +461,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/localhost:' + servers[1].port,
             token: userAccessToken,
-            statusCodeExpected: 403
+            statusCodeExpected: HttpStatusCode.FORBIDDEN_403
           })
         })
 
@@ -469,7 +470,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/localhost:9004',
             token: server.accessToken,
-            statusCodeExpected: 404
+            statusCodeExpected: HttpStatusCode.NOT_FOUND_404
           })
         })
 
@@ -478,7 +479,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             path: path + '/localhost:' + servers[1].port,
             token: server.accessToken,
-            statusCodeExpected: 204
+            statusCodeExpected: HttpStatusCode.NO_CONTENT_204
           })
         })
       })
diff --git a/server/tests/api/check-params/bulk.ts b/server/tests/api/check-params/bulk.ts
index 432858b33..07b920ba7 100644
--- a/server/tests/api/check-params/bulk.ts
+++ b/server/tests/api/check-params/bulk.ts
@@ -10,6 +10,7 @@ import {
   userLogin
 } from '../../../../shared/extra-utils'
 import { makePostBodyRequest } from '../../../../shared/extra-utils/requests/requests'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test bulk API validators', function () {
   let server: ServerInfo
@@ -37,7 +38,7 @@ describe('Test bulk API validators', function () {
         url: server.url,
         path,
         fields: { accountName: 'user1', scope: 'my-videos' },
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -47,7 +48,7 @@ describe('Test bulk API validators', function () {
         token: server.accessToken,
         path,
         fields: { accountName: 'user2', scope: 'my-videos' },
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -57,7 +58,7 @@ describe('Test bulk API validators', function () {
         token: server.accessToken,
         path,
         fields: { accountName: 'user1', scope: 'my-videoss' },
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -67,7 +68,7 @@ describe('Test bulk API validators', function () {
         token: userAccessToken,
         path,
         fields: { accountName: 'user1', scope: 'instance' },
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -77,7 +78,7 @@ describe('Test bulk API validators', function () {
         token: server.accessToken,
         path,
         fields: { accountName: 'user1', scope: 'instance' },
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
diff --git a/server/tests/api/check-params/config.ts b/server/tests/api/check-params/config.ts
index 42ac5e1f9..08576c3ae 100644
--- a/server/tests/api/check-params/config.ts
+++ b/server/tests/api/check-params/config.ts
@@ -16,6 +16,7 @@ import {
   setAccessTokensToServers,
   userLogin
 } from '../../../../shared/extra-utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test config API validators', function () {
   const path = '/api/v1/config/custom'
@@ -197,7 +198,7 @@ describe('Test config API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -206,7 +207,7 @@ describe('Test config API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
   })
@@ -217,7 +218,7 @@ describe('Test config API validators', function () {
         url: server.url,
         path,
         fields: updateParams,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -227,7 +228,7 @@ describe('Test config API validators', function () {
         path,
         fields: updateParams,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -239,7 +240,7 @@ describe('Test config API validators', function () {
         path,
         fields: newUpdateParams,
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -255,7 +256,7 @@ describe('Test config API validators', function () {
         path,
         fields: newUpdateParams,
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -274,7 +275,7 @@ describe('Test config API validators', function () {
         path,
         fields: newUpdateParams,
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -295,7 +296,7 @@ describe('Test config API validators', function () {
         path,
         fields: newUpdateParams,
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -305,7 +306,7 @@ describe('Test config API validators', function () {
         path,
         fields: updateParams,
         token: server.accessToken,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -315,7 +316,7 @@ describe('Test config API validators', function () {
       await makeDeleteRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -324,7 +325,7 @@ describe('Test config API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
   })
diff --git a/server/tests/api/check-params/debug.ts b/server/tests/api/check-params/debug.ts
index 5fac73485..37bf0f99b 100644
--- a/server/tests/api/check-params/debug.ts
+++ b/server/tests/api/check-params/debug.ts
@@ -11,6 +11,7 @@ import {
   userLogin
 } from '../../../../shared/extra-utils'
 import { makeGetRequest } from '../../../../shared/extra-utils/requests/requests'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test debug API validators', function () {
   const path = '/api/v1/server/debug'
@@ -40,7 +41,7 @@ describe('Test debug API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -49,7 +50,7 @@ describe('Test debug API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -59,7 +60,7 @@ describe('Test debug API validators', function () {
         path,
         token: server.accessToken,
         query: { startDate: new Date().toISOString() },
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
diff --git a/server/tests/api/check-params/follows.ts b/server/tests/api/check-params/follows.ts
index 2c2224a45..c03dd5c9c 100644
--- a/server/tests/api/check-params/follows.ts
+++ b/server/tests/api/check-params/follows.ts
@@ -17,6 +17,7 @@ import {
   checkBadSortPagination,
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test server follows API validators', function () {
   let server: ServerInfo
@@ -52,7 +53,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path,
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       })
 
@@ -62,7 +63,7 @@ describe('Test server follows API validators', function () {
           path,
           token: server.accessToken,
           fields: { hosts: 'localhost:9002' },
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       })
 
@@ -72,7 +73,7 @@ describe('Test server follows API validators', function () {
           path,
           fields: { hosts: [ 'localhost:9002', 'localhost:coucou' ] },
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       })
 
@@ -82,7 +83,7 @@ describe('Test server follows API validators', function () {
           path,
           fields: { hosts: [ 'localhost:9002', 'http://localhost:9003' ] },
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       })
 
@@ -92,7 +93,7 @@ describe('Test server follows API validators', function () {
           path,
           fields: { urls: [ 'localhost:9002', 'localhost:9002' ] },
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       })
 
@@ -102,7 +103,7 @@ describe('Test server follows API validators', function () {
           path,
           fields: { hosts: [ 'localhost:9002' ] },
           token: 'fake_token',
-          statusCodeExpected: 401
+          statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
         })
       })
 
@@ -112,7 +113,7 @@ describe('Test server follows API validators', function () {
           path,
           fields: { hosts: [ 'localhost:9002' ] },
           token: userAccessToken,
-          statusCodeExpected: 403
+          statusCodeExpected: HttpStatusCode.FORBIDDEN_403
         })
       })
     })
@@ -156,7 +157,7 @@ describe('Test server follows API validators', function () {
         await makeGetRequest({
           url: server.url,
           path,
-          statusCodeExpected: 200,
+          statusCodeExpected: HttpStatusCode.OK_200,
           query: {
             state: 'accepted',
             actorType: 'Application'
@@ -205,7 +206,7 @@ describe('Test server follows API validators', function () {
         await makeGetRequest({
           url: server.url,
           path,
-          statusCodeExpected: 200,
+          statusCodeExpected: HttpStatusCode.OK_200,
           query: {
             state: 'accepted'
           }
@@ -221,7 +222,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9002',
           token: 'fake_token',
-          statusCodeExpected: 401
+          statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
         })
       })
 
@@ -230,7 +231,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9002',
           token: userAccessToken,
-          statusCodeExpected: 403
+          statusCodeExpected: HttpStatusCode.FORBIDDEN_403
         })
       })
 
@@ -239,7 +240,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto',
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       })
 
@@ -248,7 +249,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9003',
           token: server.accessToken,
-          statusCodeExpected: 404
+          statusCodeExpected: HttpStatusCode.NOT_FOUND_404
         })
       })
     })
@@ -261,7 +262,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9002/accept',
           token: 'fake_token',
-          statusCodeExpected: 401
+          statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
         })
       })
 
@@ -270,7 +271,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9002/accept',
           token: userAccessToken,
-          statusCodeExpected: 403
+          statusCodeExpected: HttpStatusCode.FORBIDDEN_403
         })
       })
 
@@ -279,7 +280,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto/accept',
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       })
 
@@ -288,7 +289,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9003/accept',
           token: server.accessToken,
-          statusCodeExpected: 404
+          statusCodeExpected: HttpStatusCode.NOT_FOUND_404
         })
       })
     })
@@ -301,7 +302,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9002/reject',
           token: 'fake_token',
-          statusCodeExpected: 401
+          statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
         })
       })
 
@@ -310,7 +311,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9002/reject',
           token: userAccessToken,
-          statusCodeExpected: 403
+          statusCodeExpected: HttpStatusCode.FORBIDDEN_403
         })
       })
 
@@ -319,7 +320,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto/reject',
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       })
 
@@ -328,7 +329,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/toto@localhost:9003/reject',
           token: server.accessToken,
-          statusCodeExpected: 404
+          statusCodeExpected: HttpStatusCode.NOT_FOUND_404
         })
       })
     })
@@ -341,7 +342,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/localhost:9002',
           token: 'fake_token',
-          statusCodeExpected: 401
+          statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
         })
       })
 
@@ -350,7 +351,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/localhost:9002',
           token: userAccessToken,
-          statusCodeExpected: 403
+          statusCodeExpected: HttpStatusCode.FORBIDDEN_403
         })
       })
 
@@ -359,7 +360,7 @@ describe('Test server follows API validators', function () {
           url: server.url,
           path: path + '/example.com',
           token: server.accessToken,
-          statusCodeExpected: 404
+          statusCodeExpected: HttpStatusCode.NOT_FOUND_404
         })
       })
     })
diff --git a/server/tests/api/check-params/jobs.ts b/server/tests/api/check-params/jobs.ts
index 8f4af8d16..3c1d2049b 100644
--- a/server/tests/api/check-params/jobs.ts
+++ b/server/tests/api/check-params/jobs.ts
@@ -16,6 +16,7 @@ import {
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
 import { makeGetRequest } from '../../../../shared/extra-utils/requests/requests'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test jobs API validators', function () {
   const path = '/api/v1/jobs/failed'
@@ -76,7 +77,7 @@ describe('Test jobs API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -85,7 +86,7 @@ describe('Test jobs API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
diff --git a/server/tests/api/check-params/live.ts b/server/tests/api/check-params/live.ts
index 055f2f295..40dca908b 100644
--- a/server/tests/api/check-params/live.ts
+++ b/server/tests/api/check-params/live.ts
@@ -24,6 +24,7 @@ import {
   userLogin,
   waitUntilLiveStarts
 } from '../../../../shared/extra-utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test video lives API validator', function () {
   const path = '/api/v1/videos/live'
@@ -226,7 +227,7 @@ describe('Test video lives API validator', function () {
         path,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       videoId = res.body.video.id
@@ -244,7 +245,7 @@ describe('Test video lives API validator', function () {
         path,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -263,7 +264,7 @@ describe('Test video lives API validator', function () {
         path,
         token: server.accessToken,
         fields,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -282,7 +283,7 @@ describe('Test video lives API validator', function () {
         path,
         token: server.accessToken,
         fields,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
 
@@ -299,7 +300,7 @@ describe('Test video lives API validator', function () {
         path,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -317,7 +318,7 @@ describe('Test video lives API validator', function () {
         path,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
   })
@@ -325,27 +326,27 @@ describe('Test video lives API validator', function () {
   describe('When getting live information', function () {
 
     it('Should fail without access token', async function () {
-      await getLive(server.url, '', videoId, 401)
+      await getLive(server.url, '', videoId, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with a bad access token', async function () {
-      await getLive(server.url, 'toto', videoId, 401)
+      await getLive(server.url, 'toto', videoId, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with access token of another user', async function () {
-      await getLive(server.url, userAccessToken, videoId, 403)
+      await getLive(server.url, userAccessToken, videoId, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with a bad video id', async function () {
-      await getLive(server.url, server.accessToken, 'toto', 400)
+      await getLive(server.url, server.accessToken, 'toto', HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail with an unknown video id', async function () {
-      await getLive(server.url, server.accessToken, 454555, 404)
+      await getLive(server.url, server.accessToken, 454555, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a non live video', async function () {
-      await getLive(server.url, server.accessToken, videoIdNotLive, 404)
+      await getLive(server.url, server.accessToken, videoIdNotLive, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should succeed with the correct params', async function () {
@@ -356,33 +357,33 @@ describe('Test video lives API validator', function () {
   describe('When updating live information', async function () {
 
     it('Should fail without access token', async function () {
-      await updateLive(server.url, '', videoId, {}, 401)
+      await updateLive(server.url, '', videoId, {}, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with a bad access token', async function () {
-      await updateLive(server.url, 'toto', videoId, {}, 401)
+      await updateLive(server.url, 'toto', videoId, {}, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with access token of another user', async function () {
-      await updateLive(server.url, userAccessToken, videoId, {}, 403)
+      await updateLive(server.url, userAccessToken, videoId, {}, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with a bad video id', async function () {
-      await updateLive(server.url, server.accessToken, 'toto', {}, 400)
+      await updateLive(server.url, server.accessToken, 'toto', {}, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail with an unknown video id', async function () {
-      await updateLive(server.url, server.accessToken, 454555, {}, 404)
+      await updateLive(server.url, server.accessToken, 454555, {}, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a non live video', async function () {
-      await updateLive(server.url, server.accessToken, videoIdNotLive, {}, 404)
+      await updateLive(server.url, server.accessToken, videoIdNotLive, {}, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with save replay and permanent live set to true', async function () {
       const fields = { saveReplay: true, permanentLive: true }
 
-      await updateLive(server.url, server.accessToken, videoId, fields, 400)
+      await updateLive(server.url, server.accessToken, videoId, fields, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should succeed with the correct params', async function () {
@@ -397,7 +398,7 @@ describe('Test video lives API validator', function () {
         }
       })
 
-      await updateLive(server.url, server.accessToken, videoId, { saveReplay: true }, 403)
+      await updateLive(server.url, server.accessToken, videoId, { saveReplay: true }, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail to update a live if it has already started', async function () {
@@ -409,7 +410,7 @@ describe('Test video lives API validator', function () {
       const command = sendRTMPStream(live.rtmpUrl, live.streamKey)
 
       await waitUntilLiveStarts(server.url, server.accessToken, videoId)
-      await updateLive(server.url, server.accessToken, videoId, {}, 400)
+      await updateLive(server.url, server.accessToken, videoId, {}, HttpStatusCode.BAD_REQUEST_400)
 
       await stopFfmpeg(command)
     })
diff --git a/server/tests/api/check-params/logs.ts b/server/tests/api/check-params/logs.ts
index 719da54e6..dac1e6b98 100644
--- a/server/tests/api/check-params/logs.ts
+++ b/server/tests/api/check-params/logs.ts
@@ -11,6 +11,7 @@ import {
   userLogin
 } from '../../../../shared/extra-utils'
 import { makeGetRequest } from '../../../../shared/extra-utils/requests/requests'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test logs API validators', function () {
   const path = '/api/v1/server/logs'
@@ -40,7 +41,7 @@ describe('Test logs API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -49,7 +50,7 @@ describe('Test logs API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -58,7 +59,7 @@ describe('Test logs API validators', function () {
         url: server.url,
         path,
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -68,7 +69,7 @@ describe('Test logs API validators', function () {
         path,
         token: server.accessToken,
         query: { startDate: 'toto' },
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -78,7 +79,7 @@ describe('Test logs API validators', function () {
         path,
         token: server.accessToken,
         query: { startDate: new Date().toISOString(), endDate: 'toto' },
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -88,7 +89,7 @@ describe('Test logs API validators', function () {
         path,
         token: server.accessToken,
         query: { startDate: new Date().toISOString(), level: 'toto' },
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -98,7 +99,7 @@ describe('Test logs API validators', function () {
         path,
         token: server.accessToken,
         query: { startDate: new Date().toISOString() },
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
diff --git a/server/tests/api/check-params/plugins.ts b/server/tests/api/check-params/plugins.ts
index 07ded26ee..6e540bcbb 100644
--- a/server/tests/api/check-params/plugins.ts
+++ b/server/tests/api/check-params/plugins.ts
@@ -18,6 +18,7 @@ import {
 } from '../../../../shared/extra-utils'
 import { PluginType } from '../../../../shared/models/plugins/plugin.type'
 import { PeerTubePlugin } from '../../../../shared/models/plugins/peertube-plugin.model'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test server plugins API validators', function () {
   let server: ServerInfo
@@ -73,7 +74,7 @@ describe('Test server plugins API validators', function () {
       ]
 
       for (const p of paths) {
-        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: 404 })
+        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: HttpStatusCode.NOT_FOUND_404 })
       }
     })
 
@@ -81,7 +82,7 @@ describe('Test server plugins API validators', function () {
       await makeGetRequest({
         url: server.url,
         path: '/themes/' + pluginName + '/' + npmVersion + '/static/images/chocobo.png',
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -96,7 +97,7 @@ describe('Test server plugins API validators', function () {
       ]
 
       for (const p of paths) {
-        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: 400 })
+        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
       }
     })
 
@@ -110,14 +111,14 @@ describe('Test server plugins API validators', function () {
       ]
 
       for (const p of paths) {
-        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: 400 })
+        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
       }
     })
 
     it('Should fail with an unknown auth name', async function () {
       const path = '/plugins/' + pluginName + '/' + npmVersion + '/auth/bad-auth'
 
-      await makeGetRequest({ url: server.url, path, statusCodeExpected: 404 })
+      await makeGetRequest({ url: server.url, path, statusCodeExpected: HttpStatusCode.NOT_FOUND_404 })
     })
 
     it('Should fail with an unknown static file', async function () {
@@ -129,7 +130,7 @@ describe('Test server plugins API validators', function () {
       ]
 
       for (const p of paths) {
-        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: 404 })
+        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: HttpStatusCode.NOT_FOUND_404 })
       }
     })
 
@@ -137,7 +138,7 @@ describe('Test server plugins API validators', function () {
       await makeGetRequest({
         url: server.url,
         path: '/themes/' + themeName + '/' + themeVersion + '/css/assets/fake.css',
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -151,11 +152,11 @@ describe('Test server plugins API validators', function () {
       ]
 
       for (const p of paths) {
-        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: 200 })
+        await makeGetRequest({ url: server.url, path: p, statusCodeExpected: HttpStatusCode.OK_200 })
       }
 
       const authPath = '/plugins/' + pluginName + '/' + npmVersion + '/auth/fake-auth'
-      await makeGetRequest({ url: server.url, path: authPath, statusCodeExpected: 302 })
+      await makeGetRequest({ url: server.url, path: authPath, statusCodeExpected: HttpStatusCode.FOUND_302 })
     })
   })
 
@@ -173,7 +174,7 @@ describe('Test server plugins API validators', function () {
         path,
         token: 'fake_token',
         query: baseQuery,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -183,7 +184,7 @@ describe('Test server plugins API validators', function () {
         path,
         token: userAccessToken,
         query: baseQuery,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -227,7 +228,7 @@ describe('Test server plugins API validators', function () {
         path,
         token: server.accessToken,
         query: baseQuery,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -244,7 +245,7 @@ describe('Test server plugins API validators', function () {
         path,
         token: 'fake_token',
         query: baseQuery,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -254,7 +255,7 @@ describe('Test server plugins API validators', function () {
         path,
         token: userAccessToken,
         query: baseQuery,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -287,7 +288,7 @@ describe('Test server plugins API validators', function () {
         path,
         token: server.accessToken,
         query: baseQuery,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -301,7 +302,7 @@ describe('Test server plugins API validators', function () {
           url: server.url,
           path: path + suffix,
           token: 'fake_token',
-          statusCodeExpected: 401
+          statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
         })
       }
     })
@@ -312,7 +313,7 @@ describe('Test server plugins API validators', function () {
           url: server.url,
           path: path + suffix,
           token: userAccessToken,
-          statusCodeExpected: 403
+          statusCodeExpected: HttpStatusCode.FORBIDDEN_403
         })
       }
     })
@@ -323,7 +324,7 @@ describe('Test server plugins API validators', function () {
           url: server.url,
           path: path + suffix,
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       }
 
@@ -332,7 +333,7 @@ describe('Test server plugins API validators', function () {
           url: server.url,
           path: path + suffix,
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       }
     })
@@ -343,7 +344,7 @@ describe('Test server plugins API validators', function () {
           url: server.url,
           path: path + suffix,
           token: server.accessToken,
-          statusCodeExpected: 404
+          statusCodeExpected: HttpStatusCode.NOT_FOUND_404
         })
       }
     })
@@ -354,7 +355,7 @@ describe('Test server plugins API validators', function () {
           url: server.url,
           path: path + suffix,
           token: server.accessToken,
-          statusCodeExpected: 200
+          statusCodeExpected: HttpStatusCode.OK_200
         })
       }
     })
@@ -370,7 +371,7 @@ describe('Test server plugins API validators', function () {
         path: path + npmPlugin + '/settings',
         fields: { settings },
         token: 'fake_token',
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -380,7 +381,7 @@ describe('Test server plugins API validators', function () {
         path: path + npmPlugin + '/settings',
         fields: { settings },
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -390,7 +391,7 @@ describe('Test server plugins API validators', function () {
         path: path + 'toto/settings',
         fields: { settings },
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makePutBodyRequest({
@@ -398,7 +399,7 @@ describe('Test server plugins API validators', function () {
         path: path + 'peertube-plugin-TOTO/settings',
         fields: { settings },
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -408,7 +409,7 @@ describe('Test server plugins API validators', function () {
         path: path + 'peertube-plugin-toto/settings',
         fields: { settings },
         token: server.accessToken,
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -418,7 +419,7 @@ describe('Test server plugins API validators', function () {
         path: path + npmPlugin + '/settings',
         fields: { settings },
         token: server.accessToken,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
@@ -433,7 +434,7 @@ describe('Test server plugins API validators', function () {
           path: path + suffix,
           fields: { npmName: npmPlugin },
           token: 'fake_token',
-          statusCodeExpected: 401
+          statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
         })
       }
     })
@@ -445,7 +446,7 @@ describe('Test server plugins API validators', function () {
           path: path + suffix,
           fields: { npmName: npmPlugin },
           token: userAccessToken,
-          statusCodeExpected: 403
+          statusCodeExpected: HttpStatusCode.FORBIDDEN_403
         })
       }
     })
@@ -457,7 +458,7 @@ describe('Test server plugins API validators', function () {
           path: path + suffix,
           fields: { npmName: 'toto' },
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       }
 
@@ -467,7 +468,7 @@ describe('Test server plugins API validators', function () {
           path: path + suffix,
           fields: { npmName: 'peertube-plugin-TOTO' },
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       }
     })
@@ -476,9 +477,9 @@ describe('Test server plugins API validators', function () {
       this.timeout(10000)
 
       const it = [
-        { suffix: 'install', status: 200 },
-        { suffix: 'update', status: 200 },
-        { suffix: 'uninstall', status: 204 }
+        { suffix: 'install', status: HttpStatusCode.OK_200 },
+        { suffix: 'update', status: HttpStatusCode.OK_200 },
+        { suffix: 'uninstall', status: HttpStatusCode.NO_CONTENT_204 }
       ]
 
       for (const obj of it) {
diff --git a/server/tests/api/check-params/redundancy.ts b/server/tests/api/check-params/redundancy.ts
index cb0cc0854..3e04865ee 100644
--- a/server/tests/api/check-params/redundancy.ts
+++ b/server/tests/api/check-params/redundancy.ts
@@ -16,6 +16,7 @@ import {
   setAccessTokensToServers, uploadVideoAndGetId,
   userLogin, waitJobs, getVideoIdFromUUID
 } from '../../../../shared/extra-utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test server redundancy API validators', function () {
   let servers: ServerInfo[]
@@ -62,11 +63,11 @@ describe('Test server redundancy API validators', function () {
     })
 
     it('Should fail with an invalid token', async function () {
-      await makeGetRequest({ url, path, token: 'fake_token', statusCodeExpected: 401 })
+      await makeGetRequest({ url, path, token: 'fake_token', statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail if the user is not an administrator', async function () {
-      await makeGetRequest({ url, path, token: userAccessToken, statusCodeExpected: 403 })
+      await makeGetRequest({ url, path, token: userAccessToken, statusCodeExpected: HttpStatusCode.FORBIDDEN_403 })
     })
 
     it('Should fail with a bad start pagination', async function () {
@@ -90,7 +91,7 @@ describe('Test server redundancy API validators', function () {
     })
 
     it('Should succeed with the correct params', async function () {
-      await makeGetRequest({ url, path, token, query: { target: 'my-videos' }, statusCodeExpected: 200 })
+      await makeGetRequest({ url, path, token, query: { target: 'my-videos' }, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -106,11 +107,11 @@ describe('Test server redundancy API validators', function () {
     })
 
     it('Should fail with an invalid token', async function () {
-      await makePostBodyRequest({ url, path, token: 'fake_token', statusCodeExpected: 401 })
+      await makePostBodyRequest({ url, path, token: 'fake_token', statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail if the user is not an administrator', async function () {
-      await makePostBodyRequest({ url, path, token: userAccessToken, statusCodeExpected: 403 })
+      await makePostBodyRequest({ url, path, token: userAccessToken, statusCodeExpected: HttpStatusCode.FORBIDDEN_403 })
     })
 
     it('Should fail without a video id', async function () {
@@ -122,7 +123,7 @@ describe('Test server redundancy API validators', function () {
     })
 
     it('Should fail with a not found video id', async function () {
-      await makePostBodyRequest({ url, path, token, fields: { videoId: 6565 }, statusCodeExpected: 404 })
+      await makePostBodyRequest({ url, path, token, fields: { videoId: 6565 }, statusCodeExpected: HttpStatusCode.NOT_FOUND_404 })
     })
 
     it('Should fail with a local a video id', async function () {
@@ -130,7 +131,7 @@ describe('Test server redundancy API validators', function () {
     })
 
     it('Should succeed with the correct params', async function () {
-      await makePostBodyRequest({ url, path, token, fields: { videoId: videoIdRemote }, statusCodeExpected: 204 })
+      await makePostBodyRequest({ url, path, token, fields: { videoId: videoIdRemote }, statusCodeExpected: HttpStatusCode.NO_CONTENT_204 })
     })
 
     it('Should fail if the video is already duplicated', async function () {
@@ -138,7 +139,7 @@ describe('Test server redundancy API validators', function () {
 
       await waitJobs(servers)
 
-      await makePostBodyRequest({ url, path, token, fields: { videoId: videoIdRemote }, statusCodeExpected: 409 })
+      await makePostBodyRequest({ url, path, token, fields: { videoId: videoIdRemote }, statusCodeExpected: HttpStatusCode.CONFLICT_409 })
     })
   })
 
@@ -154,11 +155,11 @@ describe('Test server redundancy API validators', function () {
     })
 
     it('Should fail with an invalid token', async function () {
-      await makeDeleteRequest({ url, path: path + '1', token: 'fake_token', statusCodeExpected: 401 })
+      await makeDeleteRequest({ url, path: path + '1', token: 'fake_token', statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail if the user is not an administrator', async function () {
-      await makeDeleteRequest({ url, path: path + '1', token: userAccessToken, statusCodeExpected: 403 })
+      await makeDeleteRequest({ url, path: path + '1', token: userAccessToken, statusCodeExpected: HttpStatusCode.FORBIDDEN_403 })
     })
 
     it('Should fail with an incorrect video id', async function () {
@@ -166,7 +167,7 @@ describe('Test server redundancy API validators', function () {
     })
 
     it('Should fail with a not found video redundancy', async function () {
-      await makeDeleteRequest({ url, path: path + '454545', token, statusCodeExpected: 404 })
+      await makeDeleteRequest({ url, path: path + '454545', token, statusCodeExpected: HttpStatusCode.NOT_FOUND_404 })
     })
   })
 
@@ -179,7 +180,7 @@ describe('Test server redundancy API validators', function () {
         path: path + '/localhost:' + servers[1].port,
         fields: { redundancyAllowed: true },
         token: 'fake_token',
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -189,7 +190,7 @@ describe('Test server redundancy API validators', function () {
         path: path + '/localhost:' + servers[1].port,
         fields: { redundancyAllowed: true },
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -199,7 +200,7 @@ describe('Test server redundancy API validators', function () {
         path: path + '/example.com',
         fields: { redundancyAllowed: true },
         token: servers[0].accessToken,
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -209,7 +210,7 @@ describe('Test server redundancy API validators', function () {
         path: path + '/localhost:' + servers[1].port,
         fields: { blabla: true },
         token: servers[0].accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -219,7 +220,7 @@ describe('Test server redundancy API validators', function () {
         path: path + '/localhost:' + servers[1].port,
         fields: { redundancyAllowed: true },
         token: servers[0].accessToken,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
diff --git a/server/tests/api/check-params/search.ts b/server/tests/api/check-params/search.ts
index 1a8a7235e..8378c3a89 100644
--- a/server/tests/api/check-params/search.ts
+++ b/server/tests/api/check-params/search.ts
@@ -15,6 +15,7 @@ import {
   checkBadSortPagination,
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 function updateSearchIndex (server: ServerInfo, enabled: boolean, disableLocalSearch = false) {
   return updateCustomSubConfig(server.url, server.accessToken, {
@@ -59,83 +60,83 @@ describe('Test videos API validator', function () {
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path, query, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query, statusCodeExpected: HttpStatusCode.OK_200 })
     })
 
     it('Should fail with an invalid category', async function () {
       const customQuery1 = immutableAssign(query, { categoryOneOf: [ 'aa', 'b' ] })
-      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
 
       const customQuery2 = immutableAssign(query, { categoryOneOf: 'a' })
-      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
     })
 
     it('Should succeed with a valid category', async function () {
       const customQuery1 = immutableAssign(query, { categoryOneOf: [ 1, 7 ] })
-      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: HttpStatusCode.OK_200 })
 
       const customQuery2 = immutableAssign(query, { categoryOneOf: 1 })
-      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: HttpStatusCode.OK_200 })
     })
 
     it('Should fail with an invalid licence', async function () {
       const customQuery1 = immutableAssign(query, { licenceOneOf: [ 'aa', 'b' ] })
-      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
 
       const customQuery2 = immutableAssign(query, { licenceOneOf: 'a' })
-      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
     })
 
     it('Should succeed with a valid licence', async function () {
       const customQuery1 = immutableAssign(query, { licenceOneOf: [ 1, 2 ] })
-      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: HttpStatusCode.OK_200 })
 
       const customQuery2 = immutableAssign(query, { licenceOneOf: 1 })
-      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: HttpStatusCode.OK_200 })
     })
 
     it('Should succeed with a valid language', async function () {
       const customQuery1 = immutableAssign(query, { languageOneOf: [ 'fr', 'en' ] })
-      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: HttpStatusCode.OK_200 })
 
       const customQuery2 = immutableAssign(query, { languageOneOf: 'fr' })
-      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: HttpStatusCode.OK_200 })
     })
 
     it('Should succeed with valid tags', async function () {
       const customQuery1 = immutableAssign(query, { tagsOneOf: [ 'tag1', 'tag2' ] })
-      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: HttpStatusCode.OK_200 })
 
       const customQuery2 = immutableAssign(query, { tagsOneOf: 'tag1' })
-      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: HttpStatusCode.OK_200 })
 
       const customQuery3 = immutableAssign(query, { tagsAllOf: [ 'tag1', 'tag2' ] })
-      await makeGetRequest({ url: server.url, path, query: customQuery3, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery3, statusCodeExpected: HttpStatusCode.OK_200 })
 
       const customQuery4 = immutableAssign(query, { tagsAllOf: 'tag1' })
-      await makeGetRequest({ url: server.url, path, query: customQuery4, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query: customQuery4, statusCodeExpected: HttpStatusCode.OK_200 })
     })
 
     it('Should fail with invalid durations', async function () {
       const customQuery1 = immutableAssign(query, { durationMin: 'hello' })
-      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
 
       const customQuery2 = immutableAssign(query, { durationMax: 'hello' })
-      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
     })
 
     it('Should fail with invalid dates', async function () {
       const customQuery1 = immutableAssign(query, { startDate: 'hello' })
-      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery1, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
 
       const customQuery2 = immutableAssign(query, { endDate: 'hello' })
-      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery2, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
 
       const customQuery3 = immutableAssign(query, { originallyPublishedStartDate: 'hello' })
-      await makeGetRequest({ url: server.url, path, query: customQuery3, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery3, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
 
       const customQuery4 = immutableAssign(query, { originallyPublishedEndDate: 'hello' })
-      await makeGetRequest({ url: server.url, path, query: customQuery4, statusCodeExpected: 400 })
+      await makeGetRequest({ url: server.url, path, query: customQuery4, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
     })
   })
 
@@ -159,7 +160,7 @@ describe('Test videos API validator', function () {
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path, query, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, query, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -177,41 +178,41 @@ describe('Test videos API validator', function () {
       for (const path of paths) {
         {
           const customQuery = immutableAssign(query, { searchTarget: 'hello' })
-          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: 400 })
+          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
         }
 
         {
           const customQuery = immutableAssign(query, { searchTarget: undefined })
-          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: 200 })
+          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: HttpStatusCode.OK_200 })
         }
 
         {
           const customQuery = immutableAssign(query, { searchTarget: 'local' })
-          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: 200 })
+          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: HttpStatusCode.OK_200 })
         }
 
         {
           const customQuery = immutableAssign(query, { searchTarget: 'search-index' })
-          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: 400 })
+          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
         }
 
         await updateSearchIndex(server, true, true)
 
         {
           const customQuery = immutableAssign(query, { searchTarget: 'local' })
-          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: 400 })
+          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: HttpStatusCode.BAD_REQUEST_400 })
         }
 
         {
           const customQuery = immutableAssign(query, { searchTarget: 'search-index' })
-          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: 200 })
+          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: HttpStatusCode.OK_200 })
         }
 
         await updateSearchIndex(server, true, false)
 
         {
           const customQuery = immutableAssign(query, { searchTarget: 'local' })
-          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: 200 })
+          await makeGetRequest({ url: server.url, path, query: customQuery, statusCodeExpected: HttpStatusCode.OK_200 })
         }
 
         await updateSearchIndex(server, false, false)
diff --git a/server/tests/api/check-params/services.ts b/server/tests/api/check-params/services.ts
index e57edd9e4..514e3da70 100644
--- a/server/tests/api/check-params/services.ts
+++ b/server/tests/api/check-params/services.ts
@@ -13,6 +13,7 @@ import {
   setDefaultVideoChannel
 } from '../../../../shared/extra-utils'
 import { VideoPlaylistPrivacy } from '@shared/models'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test services API validators', function () {
   let server: ServerInfo
@@ -66,7 +67,7 @@ describe('Test services API validators', function () {
 
     it('Should fail with an unknown element', async function () {
       const embedUrl = `http://localhost:${server.port}/videos/watch/88fc0165-d1f0-4a35-a51a-3b47f668689c`
-      await checkParamEmbed(server, embedUrl, 404)
+      await checkParamEmbed(server, embedUrl, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with an invalid path', async function () {
@@ -78,25 +79,25 @@ describe('Test services API validators', function () {
     it('Should fail with an invalid max height', async function () {
       const embedUrl = `http://localhost:${server.port}/videos/watch/${server.video.uuid}`
 
-      await checkParamEmbed(server, embedUrl, 400, { maxheight: 'hello' })
+      await checkParamEmbed(server, embedUrl, HttpStatusCode.BAD_REQUEST_400, { maxheight: 'hello' })
     })
 
     it('Should fail with an invalid max width', async function () {
       const embedUrl = `http://localhost:${server.port}/videos/watch/${server.video.uuid}`
 
-      await checkParamEmbed(server, embedUrl, 400, { maxwidth: 'hello' })
+      await checkParamEmbed(server, embedUrl, HttpStatusCode.BAD_REQUEST_400, { maxwidth: 'hello' })
     })
 
     it('Should fail with an invalid format', async function () {
       const embedUrl = `http://localhost:${server.port}/videos/watch/${server.video.uuid}`
 
-      await checkParamEmbed(server, embedUrl, 400, { format: 'blabla' })
+      await checkParamEmbed(server, embedUrl, HttpStatusCode.BAD_REQUEST_400, { format: 'blabla' })
     })
 
     it('Should fail with a non supported format', async function () {
       const embedUrl = `http://localhost:${server.port}/videos/watch/${server.video.uuid}`
 
-      await checkParamEmbed(server, embedUrl, 501, { format: 'xml' })
+      await checkParamEmbed(server, embedUrl, HttpStatusCode.NOT_IMPLEMENTED_501, { format: 'xml' })
     })
 
     it('Should succeed with the correct params with a video', async function () {
@@ -107,7 +108,7 @@ describe('Test services API validators', function () {
         maxwidth: 400
       }
 
-      await checkParamEmbed(server, embedUrl, 200, query)
+      await checkParamEmbed(server, embedUrl, HttpStatusCode.OK_200, query)
     })
 
     it('Should succeed with the correct params with a playlist', async function () {
@@ -118,7 +119,7 @@ describe('Test services API validators', function () {
         maxwidth: 400
       }
 
-      await checkParamEmbed(server, embedUrl, 200, query)
+      await checkParamEmbed(server, embedUrl, HttpStatusCode.OK_200, query)
     })
   })
 
@@ -127,7 +128,7 @@ describe('Test services API validators', function () {
   })
 })
 
-function checkParamEmbed (server: ServerInfo, embedUrl: string, statusCodeExpected = 400, query = {}) {
+function checkParamEmbed (server: ServerInfo, embedUrl: string, statusCodeExpected = HttpStatusCode.BAD_REQUEST_400, query = {}) {
   const path = '/services/oembed'
 
   return makeGetRequest({
diff --git a/server/tests/api/check-params/user-notifications.ts b/server/tests/api/check-params/user-notifications.ts
index 6fa0502be..05a78b0ad 100644
--- a/server/tests/api/check-params/user-notifications.ts
+++ b/server/tests/api/check-params/user-notifications.ts
@@ -20,6 +20,7 @@ import {
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
 import { UserNotificationSetting, UserNotificationSettingValue } from '../../../../shared/models/users'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test user notifications API validators', function () {
   let server: ServerInfo
@@ -57,7 +58,7 @@ describe('Test user notifications API validators', function () {
           unread: 'toto'
         },
         token: server.accessToken,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
 
@@ -65,7 +66,7 @@ describe('Test user notifications API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -74,7 +75,7 @@ describe('Test user notifications API validators', function () {
         url: server.url,
         path,
         token: server.accessToken,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -90,7 +91,7 @@ describe('Test user notifications API validators', function () {
           ids: [ 'hello' ]
         },
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makePostBodyRequest({
@@ -100,7 +101,7 @@ describe('Test user notifications API validators', function () {
           ids: [ ]
         },
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makePostBodyRequest({
@@ -110,7 +111,7 @@ describe('Test user notifications API validators', function () {
           ids: 5
         },
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -121,7 +122,7 @@ describe('Test user notifications API validators', function () {
         fields: {
           ids: [ 5 ]
         },
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -133,7 +134,7 @@ describe('Test user notifications API validators', function () {
           ids: [ 5 ]
         },
         token: server.accessToken,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
@@ -145,7 +146,7 @@ describe('Test user notifications API validators', function () {
       await makePostBodyRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -154,7 +155,7 @@ describe('Test user notifications API validators', function () {
         url: server.url,
         path,
         token: server.accessToken,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
@@ -184,7 +185,7 @@ describe('Test user notifications API validators', function () {
         path,
         token: server.accessToken,
         fields: { newVideoFromSubscription: UserNotificationSettingValue.WEB },
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -197,7 +198,7 @@ describe('Test user notifications API validators', function () {
           path,
           token: server.accessToken,
           fields,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       }
 
@@ -209,7 +210,7 @@ describe('Test user notifications API validators', function () {
           path,
           fields,
           token: server.accessToken,
-          statusCodeExpected: 400
+          statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
         })
       }
     })
@@ -219,7 +220,7 @@ describe('Test user notifications API validators', function () {
         url: server.url,
         path,
         fields: correctFields,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -229,7 +230,7 @@ describe('Test user notifications API validators', function () {
         path,
         token: server.accessToken,
         fields: correctFields,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
diff --git a/server/tests/api/check-params/user-subscriptions.ts b/server/tests/api/check-params/user-subscriptions.ts
index 1edba4d64..538201647 100644
--- a/server/tests/api/check-params/user-subscriptions.ts
+++ b/server/tests/api/check-params/user-subscriptions.ts
@@ -20,6 +20,7 @@ import {
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
 import { waitJobs } from '../../../../shared/extra-utils/server/jobs'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test user subscriptions API validators', function () {
   const path = '/api/v1/users/me/subscriptions'
@@ -60,7 +61,7 @@ describe('Test user subscriptions API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -69,7 +70,7 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -93,7 +94,7 @@ describe('Test user subscriptions API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -102,7 +103,7 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -113,7 +114,7 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path,
         fields: { uri: 'user1_channel@localhost:' + server.port },
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -123,7 +124,7 @@ describe('Test user subscriptions API validators', function () {
         path,
         token: server.accessToken,
         fields: { uri: 'root' },
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makePostBodyRequest({
@@ -131,7 +132,7 @@ describe('Test user subscriptions API validators', function () {
         path,
         token: server.accessToken,
         fields: { uri: 'root@' },
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makePostBodyRequest({
@@ -139,7 +140,7 @@ describe('Test user subscriptions API validators', function () {
         path,
         token: server.accessToken,
         fields: { uri: 'root@hello@' },
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -151,7 +152,7 @@ describe('Test user subscriptions API validators', function () {
         path,
         token: server.accessToken,
         fields: { uri: 'user1_channel@localhost:' + server.port },
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
 
       await waitJobs([ server ])
@@ -163,7 +164,7 @@ describe('Test user subscriptions API validators', function () {
       await makeGetRequest({
         url: server.url,
         path: path + '/user1_channel@localhost:' + server.port,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -172,21 +173,21 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path: path + '/root',
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makeGetRequest({
         url: server.url,
         path: path + '/root@',
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makeGetRequest({
         url: server.url,
         path: path + '/root@hello@',
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -195,7 +196,7 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path: path + '/root1@localhost:' + server.port,
         token: server.accessToken,
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -204,7 +205,7 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path: path + '/user1_channel@localhost:' + server.port,
         token: server.accessToken,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -216,7 +217,7 @@ describe('Test user subscriptions API validators', function () {
       await makeGetRequest({
         url: server.url,
         path: existPath,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -226,7 +227,7 @@ describe('Test user subscriptions API validators', function () {
         path: existPath,
         query: { uris: 'toto' },
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makeGetRequest({
@@ -234,7 +235,7 @@ describe('Test user subscriptions API validators', function () {
         path: existPath,
         query: { 'uris[]': 1 },
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -244,7 +245,7 @@ describe('Test user subscriptions API validators', function () {
         path: existPath,
         query: { 'uris[]': 'coucou@localhost:' + server.port },
         token: server.accessToken,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -254,7 +255,7 @@ describe('Test user subscriptions API validators', function () {
       await makeDeleteRequest({
         url: server.url,
         path: path + '/user1_channel@localhost:' + server.port,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -263,21 +264,21 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path: path + '/root',
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makeDeleteRequest({
         url: server.url,
         path: path + '/root@',
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
 
       await makeDeleteRequest({
         url: server.url,
         path: path + '/root@hello@',
         token: server.accessToken,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -286,7 +287,7 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path: path + '/root1@localhost:' + server.port,
         token: server.accessToken,
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -295,7 +296,7 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path: path + '/user1_channel@localhost:' + server.port,
         token: server.accessToken,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
diff --git a/server/tests/api/check-params/users.ts b/server/tests/api/check-params/users.ts
index da7dc9704..21ace36aa 100644
--- a/server/tests/api/check-params/users.ts
+++ b/server/tests/api/check-params/users.ts
@@ -43,6 +43,7 @@ import { waitJobs } from '../../../../shared/extra-utils/server/jobs'
 import { getGoodVideoUrl, getMagnetURI, getMyVideoImports, importVideo } from '../../../../shared/extra-utils/videos/video-imports'
 import { UserAdminFlag } from '../../../../shared/models/users/user-flag.model'
 import { VideoPrivacy } from '../../../../shared/models/videos'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test users API validators', function () {
   const path = '/api/v1/users/'
@@ -160,7 +161,7 @@ describe('Test users API validators', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -169,7 +170,7 @@ describe('Test users API validators', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
   })
@@ -263,7 +264,7 @@ describe('Test users API validators', function () {
         path: path,
         token: server.accessToken,
         fields,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
 
@@ -279,20 +280,32 @@ describe('Test users API validators', function () {
         path,
         token: 'super token',
         fields: baseCorrectParams,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
     it('Should fail if we add a user with the same username', async function () {
       const fields = immutableAssign(baseCorrectParams, { username: 'user1' })
 
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 409 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
+      })
     })
 
     it('Should fail if we add a user with the same email', async function () {
       const fields = immutableAssign(baseCorrectParams, { email: 'user1@example.com' })
 
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 409 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
+      })
     })
 
     it('Should fail without a videoQuota', async function () {
@@ -339,7 +352,7 @@ describe('Test users API validators', function () {
         path,
         token: server.accessToken,
         fields,
-        statusCodeExpected: 409
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
       })
     })
 
@@ -352,7 +365,7 @@ describe('Test users API validators', function () {
           path,
           token: moderatorAccessToken,
           fields,
-          statusCodeExpected: 403
+          statusCodeExpected: HttpStatusCode.FORBIDDEN_403
         })
       }
     })
@@ -365,7 +378,7 @@ describe('Test users API validators', function () {
         path,
         token: moderatorAccessToken,
         fields,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
 
@@ -375,7 +388,7 @@ describe('Test users API validators', function () {
         path,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
 
@@ -392,7 +405,7 @@ describe('Test users API validators', function () {
         password: 'my super password',
         videoQuota: 42000000
       }
-      await makePostBodyRequest({ url: server.url, path, token: userAccessToken, fields, statusCodeExpected: 403 })
+      await makePostBodyRequest({ url: server.url, path, token: userAccessToken, fields, statusCodeExpected: HttpStatusCode.FORBIDDEN_403 })
     })
   })
 
@@ -438,7 +451,13 @@ describe('Test users API validators', function () {
         password: 'super'.repeat(61)
       }
 
-      await makePutBodyRequest({ url: server.url, path: path + 'me', token: userAccessToken, fields, statusCodeExpected: 401 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: path + 'me',
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
+      })
     })
 
     it('Should fail with an invalid NSFW policy attribute', async function () {
@@ -479,7 +498,13 @@ describe('Test users API validators', function () {
         password: 'my super password'
       }
 
-      await makePutBodyRequest({ url: server.url, path: path + 'me', token: 'super token', fields, statusCodeExpected: 401 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: path + 'me',
+        token: 'super token',
+        fields,
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
+      })
     })
 
     it('Should fail with a too long description', async function () {
@@ -551,7 +576,13 @@ describe('Test users API validators', function () {
         noWelcomeModal: true
       }
 
-      await makePutBodyRequest({ url: server.url, path: path + 'me', token: userAccessToken, fields, statusCodeExpected: 204 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: path + 'me',
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
 
     it('Should succeed without password change with the correct params', async function () {
@@ -560,7 +591,13 @@ describe('Test users API validators', function () {
         autoPlayVideo: false
       }
 
-      await makePutBodyRequest({ url: server.url, path: path + 'me', token: userAccessToken, fields, statusCodeExpected: 204 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: path + 'me',
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
@@ -591,7 +628,7 @@ describe('Test users API validators', function () {
         path: path + '/me/avatar/pick',
         fields,
         attaches,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -606,7 +643,7 @@ describe('Test users API validators', function () {
         token: server.accessToken,
         fields,
         attaches,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -614,11 +651,11 @@ describe('Test users API validators', function () {
   describe('When managing my scoped tokens', function () {
 
     it('Should fail to get my scoped tokens with an non authenticated user', async function () {
-      await getUserScopedTokens(server.url, null, 401)
+      await getUserScopedTokens(server.url, null, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail to get my scoped tokens with a bad token', async function () {
-      await getUserScopedTokens(server.url, 'bad', 401)
+      await getUserScopedTokens(server.url, 'bad', HttpStatusCode.UNAUTHORIZED_401)
 
     })
 
@@ -627,11 +664,11 @@ describe('Test users API validators', function () {
     })
 
     it('Should fail to renew my scoped tokens with an non authenticated user', async function () {
-      await renewUserScopedTokens(server.url, null, 401)
+      await renewUserScopedTokens(server.url, null, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail to renew my scoped tokens with a bad token', async function () {
-      await renewUserScopedTokens(server.url, 'bad', 401)
+      await renewUserScopedTokens(server.url, 'bad', HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should succeed to renew my scoped tokens', async function () {
@@ -642,15 +679,20 @@ describe('Test users API validators', function () {
   describe('When getting a user', function () {
 
     it('Should fail with an non authenticated user', async function () {
-      await makeGetRequest({ url: server.url, path: path + userId, token: 'super token', statusCodeExpected: 401 })
+      await makeGetRequest({
+        url: server.url,
+        path: path + userId,
+        token: 'super token',
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
+      })
     })
 
     it('Should fail with a non admin user', async function () {
-      await makeGetRequest({ url: server.url, path, token: userAccessToken, statusCodeExpected: 403 })
+      await makeGetRequest({ url: server.url, path, token: userAccessToken, statusCodeExpected: HttpStatusCode.FORBIDDEN_403 })
     })
 
     it('Should succeed with the correct params', async function () {
-      await makeGetRequest({ url: server.url, path: path + userId, token: server.accessToken, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path: path + userId, token: server.accessToken, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -711,7 +753,13 @@ describe('Test users API validators', function () {
         videoQuota: 42
       }
 
-      await makePutBodyRequest({ url: server.url, path: path + userId, token: 'super token', fields, statusCodeExpected: 401 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: path + userId,
+        token: 'super token',
+        fields,
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
+      })
     })
 
     it('Should fail when updating root role', async function () {
@@ -738,7 +786,7 @@ describe('Test users API validators', function () {
         path: path + moderatorId,
         token: moderatorAccessToken,
         fields,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -752,7 +800,7 @@ describe('Test users API validators', function () {
         path: path + userId,
         token: moderatorAccessToken,
         fields,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
 
@@ -764,13 +812,19 @@ describe('Test users API validators', function () {
         role: UserRole.USER
       }
 
-      await makePutBodyRequest({ url: server.url, path: path + userId, token: server.accessToken, fields, statusCodeExpected: 204 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: path + userId,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
   describe('When getting my information', function () {
     it('Should fail with a non authenticated user', async function () {
-      await getMyUserInformation(server.url, 'fake_token', 401)
+      await getMyUserInformation(server.url, 'fake_token', HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should success with the correct parameters', async function () {
@@ -780,15 +834,15 @@ describe('Test users API validators', function () {
 
   describe('When getting my video rating', function () {
     it('Should fail with a non authenticated user', async function () {
-      await getMyUserVideoRating(server.url, 'fake_token', videoId, 401)
+      await getMyUserVideoRating(server.url, 'fake_token', videoId, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with an incorrect video uuid', async function () {
-      await getMyUserVideoRating(server.url, server.accessToken, 'blabla', 400)
+      await getMyUserVideoRating(server.url, server.accessToken, 'blabla', HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail with an unknown video', async function () {
-      await getMyUserVideoRating(server.url, server.accessToken, '4da6fde3-88f7-4d16-b119-108df5630b06', 404)
+      await getMyUserVideoRating(server.url, server.accessToken, '4da6fde3-88f7-4d16-b119-108df5630b06', HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should succeed with the correct parameters', async function () {
@@ -812,51 +866,57 @@ describe('Test users API validators', function () {
     })
 
     it('Should fail with a unauthenticated user', async function () {
-      await makeGetRequest({ url: server.url, path, statusCodeExpected: 401 })
+      await makeGetRequest({ url: server.url, path, statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with a another user', async function () {
-      await makeGetRequest({ url: server.url, path, token: server.accessToken, statusCodeExpected: 403 })
+      await makeGetRequest({ url: server.url, path, token: server.accessToken, statusCodeExpected: HttpStatusCode.FORBIDDEN_403 })
     })
 
     it('Should fail with a bad type', async function () {
-      await makeGetRequest({ url: server.url, path, token: userAccessToken, query: { rating: 'toto ' }, statusCodeExpected: 400 })
+      await makeGetRequest({
+        url: server.url,
+        path,
+        token: userAccessToken,
+        query: { rating: 'toto ' },
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
+      })
     })
 
     it('Should succeed with the correct params', async function () {
-      await makeGetRequest({ url: server.url, path, token: userAccessToken, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, token: userAccessToken, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
   describe('When blocking/unblocking/removing user', function () {
     it('Should fail with an incorrect id', async function () {
-      await removeUser(server.url, 'blabla', server.accessToken, 400)
-      await blockUser(server.url, 'blabla', server.accessToken, 400)
-      await unblockUser(server.url, 'blabla', server.accessToken, 400)
+      await removeUser(server.url, 'blabla', server.accessToken, HttpStatusCode.BAD_REQUEST_400)
+      await blockUser(server.url, 'blabla', server.accessToken, HttpStatusCode.BAD_REQUEST_400)
+      await unblockUser(server.url, 'blabla', server.accessToken, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail with the root user', async function () {
-      await removeUser(server.url, rootId, server.accessToken, 400)
-      await blockUser(server.url, rootId, server.accessToken, 400)
-      await unblockUser(server.url, rootId, server.accessToken, 400)
+      await removeUser(server.url, rootId, server.accessToken, HttpStatusCode.BAD_REQUEST_400)
+      await blockUser(server.url, rootId, server.accessToken, HttpStatusCode.BAD_REQUEST_400)
+      await unblockUser(server.url, rootId, server.accessToken, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should return 404 with a non existing id', async function () {
-      await removeUser(server.url, 4545454, server.accessToken, 404)
-      await blockUser(server.url, 4545454, server.accessToken, 404)
-      await unblockUser(server.url, 4545454, server.accessToken, 404)
+      await removeUser(server.url, 4545454, server.accessToken, HttpStatusCode.NOT_FOUND_404)
+      await blockUser(server.url, 4545454, server.accessToken, HttpStatusCode.NOT_FOUND_404)
+      await unblockUser(server.url, 4545454, server.accessToken, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a non admin user', async function () {
-      await removeUser(server.url, userId, userAccessToken, 403)
-      await blockUser(server.url, userId, userAccessToken, 403)
-      await unblockUser(server.url, userId, userAccessToken, 403)
+      await removeUser(server.url, userId, userAccessToken, HttpStatusCode.FORBIDDEN_403)
+      await blockUser(server.url, userId, userAccessToken, HttpStatusCode.FORBIDDEN_403)
+      await unblockUser(server.url, userId, userAccessToken, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail on a moderator with a moderator', async function () {
-      await removeUser(server.url, moderatorId, moderatorAccessToken, 403)
-      await blockUser(server.url, moderatorId, moderatorAccessToken, 403)
-      await unblockUser(server.url, moderatorId, moderatorAccessToken, 403)
+      await removeUser(server.url, moderatorId, moderatorAccessToken, HttpStatusCode.FORBIDDEN_403)
+      await blockUser(server.url, moderatorId, moderatorAccessToken, HttpStatusCode.FORBIDDEN_403)
+      await unblockUser(server.url, moderatorId, moderatorAccessToken, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should succeed on a user with a moderator', async function () {
@@ -867,7 +927,7 @@ describe('Test users API validators', function () {
 
   describe('When deleting our account', function () {
     it('Should fail with with the root account', async function () {
-      await deleteMe(server.url, server.accessToken, 400)
+      await deleteMe(server.url, server.accessToken, HttpStatusCode.BAD_REQUEST_400)
     })
   })
 
@@ -930,7 +990,7 @@ describe('Test users API validators', function () {
         path: registrationPath,
         token: server.accessToken,
         fields,
-        statusCodeExpected: 409
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
       })
     })
 
@@ -942,7 +1002,7 @@ describe('Test users API validators', function () {
         path: registrationPath,
         token: server.accessToken,
         fields,
-        statusCodeExpected: 409
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
       })
     })
 
@@ -954,7 +1014,7 @@ describe('Test users API validators', function () {
         path: registrationPath,
         token: server.accessToken,
         fields,
-        statusCodeExpected: 409
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
       })
     })
 
@@ -989,7 +1049,13 @@ describe('Test users API validators', function () {
 
       const fields = immutableAssign(baseCorrectParams, { channel: { name: 'existing_channel', displayName: 'toto' } })
 
-      await makePostBodyRequest({ url: server.url, path: registrationPath, token: server.accessToken, fields, statusCodeExpected: 409 })
+      await makePostBodyRequest({
+        url: server.url,
+        path: registrationPath,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
+      })
     })
 
     it('Should succeed with the correct params', async function () {
@@ -1000,7 +1066,7 @@ describe('Test users API validators', function () {
         path: registrationPath,
         token: server.accessToken,
         fields: fields,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
 
@@ -1016,14 +1082,14 @@ describe('Test users API validators', function () {
         path: registrationPath,
         token: serverWithRegistrationDisabled.accessToken,
         fields,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
   })
 
   describe('When registering multiple users on a server with users limit', function () {
     it('Should fail when after 3 registrations', async function () {
-      await registerUser(server.url, 'user42', 'super password', 403)
+      await registerUser(server.url, 'user42', 'super password', HttpStatusCode.FORBIDDEN_403)
     })
   })
 
@@ -1036,7 +1102,7 @@ describe('Test users API validators', function () {
         videoQuota: 42
       })
 
-      await uploadVideo(server.url, server.accessToken, {}, 403)
+      await uploadVideo(server.url, server.accessToken, {}, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with a registered user having too many videos', async function () {
@@ -1054,7 +1120,7 @@ describe('Test users API validators', function () {
       await uploadVideo(server.url, userAccessToken, videoAttributes)
       await uploadVideo(server.url, userAccessToken, videoAttributes)
       await uploadVideo(server.url, userAccessToken, videoAttributes)
-      await uploadVideo(server.url, userAccessToken, videoAttributes, 403)
+      await uploadVideo(server.url, userAccessToken, videoAttributes, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail to import with HTTP/Torrent/magnet', async function () {
@@ -1093,7 +1159,7 @@ describe('Test users API validators', function () {
         videoQuotaDaily: 42
       })
 
-      await uploadVideo(server.url, server.accessToken, {}, 403)
+      await uploadVideo(server.url, server.accessToken, {}, HttpStatusCode.FORBIDDEN_403)
     })
   })
 
@@ -1107,7 +1173,7 @@ describe('Test users API validators', function () {
         videoQuotaDaily: 1024 * 1024 * 1024
       })
 
-      await uploadVideo(server.url, server.accessToken, {}, 403)
+      await uploadVideo(server.url, server.accessToken, {}, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail if exceeding daily quota', async function () {
@@ -1119,7 +1185,7 @@ describe('Test users API validators', function () {
         videoQuotaDaily: 42
       })
 
-      await uploadVideo(server.url, server.accessToken, {}, 403)
+      await uploadVideo(server.url, server.accessToken, {}, HttpStatusCode.FORBIDDEN_403)
     })
   })
 
@@ -1141,7 +1207,13 @@ describe('Test users API validators', function () {
     it('Should success with the correct params', async function () {
       const fields = { email: 'admin@example.com' }
 
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 204 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
@@ -1163,7 +1235,13 @@ describe('Test users API validators', function () {
     it('Should succeed with the correct params', async function () {
       const fields = { email: 'admin@example.com' }
 
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 204 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
diff --git a/server/tests/api/check-params/video-blacklist.ts b/server/tests/api/check-params/video-blacklist.ts
index 145f43980..3d4837d58 100644
--- a/server/tests/api/check-params/video-blacklist.ts
+++ b/server/tests/api/check-params/video-blacklist.ts
@@ -26,6 +26,7 @@ import {
 } from '../../../../shared/extra-utils/requests/check-api-params'
 import { VideoBlacklistType, VideoDetails } from '../../../../shared/models/videos'
 import { expect } from 'chai'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test video blacklist API validators', function () {
   let servers: ServerInfo[]
@@ -94,13 +95,19 @@ describe('Test video blacklist API validators', function () {
     it('Should fail with a non authenticated user', async function () {
       const path = basePath + servers[0].video + '/blacklist'
       const fields = {}
-      await makePostBodyRequest({ url: servers[0].url, path, token: 'hello', fields, statusCodeExpected: 401 })
+      await makePostBodyRequest({ url: servers[0].url, path, token: 'hello', fields, statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with a non admin user', async function () {
       const path = basePath + servers[0].video + '/blacklist'
       const fields = {}
-      await makePostBodyRequest({ url: servers[0].url, path, token: userAccessToken2, fields, statusCodeExpected: 403 })
+      await makePostBodyRequest({
+        url: servers[0].url,
+        path,
+        token: userAccessToken2,
+        fields,
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
+      })
     })
 
     it('Should fail with an invalid reason', async function () {
@@ -114,14 +121,26 @@ describe('Test video blacklist API validators', function () {
       const path = basePath + remoteVideoUUID + '/blacklist'
       const fields = { unfederate: true }
 
-      await makePostBodyRequest({ url: servers[0].url, path, token: servers[0].accessToken, fields, statusCodeExpected: 409 })
+      await makePostBodyRequest({
+        url: servers[0].url,
+        path,
+        token: servers[0].accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
+      })
     })
 
     it('Should succeed with the correct params', async function () {
       const path = basePath + servers[0].video.uuid + '/blacklist'
       const fields = {}
 
-      await makePostBodyRequest({ url: servers[0].url, path, token: servers[0].accessToken, fields, statusCodeExpected: 204 })
+      await makePostBodyRequest({
+        url: servers[0].url,
+        path,
+        token: servers[0].accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
@@ -137,19 +156,31 @@ describe('Test video blacklist API validators', function () {
     it('Should fail with a video not blacklisted', async function () {
       const path = '/api/v1/videos/' + notBlacklistedVideoId + '/blacklist'
       const fields = {}
-      await makePutBodyRequest({ url: servers[0].url, path, token: servers[0].accessToken, fields, statusCodeExpected: 404 })
+      await makePutBodyRequest({
+        url: servers[0].url,
+        path,
+        token: servers[0].accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should fail with a non authenticated user', async function () {
       const path = basePath + servers[0].video + '/blacklist'
       const fields = {}
-      await makePutBodyRequest({ url: servers[0].url, path, token: 'hello', fields, statusCodeExpected: 401 })
+      await makePutBodyRequest({ url: servers[0].url, path, token: 'hello', fields, statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with a non admin user', async function () {
       const path = basePath + servers[0].video + '/blacklist'
       const fields = {}
-      await makePutBodyRequest({ url: servers[0].url, path, token: userAccessToken2, fields, statusCodeExpected: 403 })
+      await makePutBodyRequest({
+        url: servers[0].url,
+        path,
+        token: userAccessToken2,
+        fields,
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
+      })
     })
 
     it('Should fail with an invalid reason', async function () {
@@ -163,29 +194,35 @@ describe('Test video blacklist API validators', function () {
       const path = basePath + servers[0].video.uuid + '/blacklist'
       const fields = { reason: 'hello' }
 
-      await makePutBodyRequest({ url: servers[0].url, path, token: servers[0].accessToken, fields, statusCodeExpected: 204 })
+      await makePutBodyRequest({
+        url: servers[0].url,
+        path,
+        token: servers[0].accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
   describe('When getting blacklisted video', function () {
 
     it('Should fail with a non authenticated user', async function () {
-      await getVideo(servers[0].url, servers[0].video.uuid, 401)
+      await getVideo(servers[0].url, servers[0].video.uuid, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with another user', async function () {
-      await getVideoWithToken(servers[0].url, userAccessToken2, servers[0].video.uuid, 403)
+      await getVideoWithToken(servers[0].url, userAccessToken2, servers[0].video.uuid, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should succeed with the owner authenticated user', async function () {
-      const res = await getVideoWithToken(servers[0].url, userAccessToken1, servers[0].video.uuid, 200)
+      const res = await getVideoWithToken(servers[0].url, userAccessToken1, servers[0].video.uuid, HttpStatusCode.OK_200)
       const video: VideoDetails = res.body
 
       expect(video.blacklisted).to.be.true
     })
 
     it('Should succeed with an admin', async function () {
-      const res = await getVideoWithToken(servers[0].url, servers[0].accessToken, servers[0].video.uuid, 200)
+      const res = await getVideoWithToken(servers[0].url, servers[0].accessToken, servers[0].video.uuid, HttpStatusCode.OK_200)
       const video: VideoDetails = res.body
 
       expect(video.blacklisted).to.be.true
@@ -194,24 +231,24 @@ describe('Test video blacklist API validators', function () {
 
   describe('When removing a video in blacklist', function () {
     it('Should fail with a non authenticated user', async function () {
-      await removeVideoFromBlacklist(servers[0].url, 'fake token', servers[0].video.uuid, 401)
+      await removeVideoFromBlacklist(servers[0].url, 'fake token', servers[0].video.uuid, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with a non admin user', async function () {
-      await removeVideoFromBlacklist(servers[0].url, userAccessToken2, servers[0].video.uuid, 403)
+      await removeVideoFromBlacklist(servers[0].url, userAccessToken2, servers[0].video.uuid, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with an incorrect id', async function () {
-      await removeVideoFromBlacklist(servers[0].url, servers[0].accessToken, 'hello', 400)
+      await removeVideoFromBlacklist(servers[0].url, servers[0].accessToken, 'hello', HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail with a not blacklisted video', async function () {
       // The video was not added to the blacklist so it should fail
-      await removeVideoFromBlacklist(servers[0].url, servers[0].accessToken, notBlacklistedVideoId, 404)
+      await removeVideoFromBlacklist(servers[0].url, servers[0].accessToken, notBlacklistedVideoId, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should succeed with the correct params', async function () {
-      await removeVideoFromBlacklist(servers[0].url, servers[0].accessToken, servers[0].video.uuid, 204)
+      await removeVideoFromBlacklist(servers[0].url, servers[0].accessToken, servers[0].video.uuid, HttpStatusCode.NO_CONTENT_204)
     })
   })
 
@@ -219,11 +256,11 @@ describe('Test video blacklist API validators', function () {
     const basePath = '/api/v1/videos/blacklist/'
 
     it('Should fail with a non authenticated user', async function () {
-      await getBlacklistedVideosList({ url: servers[0].url, token: 'fake token', specialStatus: 401 })
+      await getBlacklistedVideosList({ url: servers[0].url, token: 'fake token', specialStatus: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with a non admin user', async function () {
-      await getBlacklistedVideosList({ url: servers[0].url, token: userAccessToken2, specialStatus: 403 })
+      await getBlacklistedVideosList({ url: servers[0].url, token: userAccessToken2, specialStatus: HttpStatusCode.FORBIDDEN_403 })
     })
 
     it('Should fail with a bad start pagination', async function () {
@@ -239,7 +276,12 @@ describe('Test video blacklist API validators', function () {
     })
 
     it('Should fail with an invalid type', async function () {
-      await getBlacklistedVideosList({ url: servers[0].url, token: servers[0].accessToken, type: 0, specialStatus: 400 })
+      await getBlacklistedVideosList({
+        url: servers[0].url,
+        token: servers[0].accessToken,
+        type: 0,
+        specialStatus: HttpStatusCode.BAD_REQUEST_400
+      })
     })
 
     it('Should succeed with the correct parameters', async function () {
diff --git a/server/tests/api/check-params/video-captions.ts b/server/tests/api/check-params/video-captions.ts
index a5f5c3322..e42e8db81 100644
--- a/server/tests/api/check-params/video-captions.ts
+++ b/server/tests/api/check-params/video-captions.ts
@@ -15,6 +15,7 @@ import {
 } from '../../../../shared/extra-utils'
 import { join } from 'path'
 import { createVideoCaption } from '../../../../shared/extra-utils/videos/video-captions'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test video captions API validator', function () {
   const path = '/api/v1/videos/'
@@ -107,7 +108,7 @@ describe('Test video captions API validator', function () {
         path: captionPath,
         fields,
         attaches,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -120,7 +121,7 @@ describe('Test video captions API validator', function () {
         token: 'blabla',
         fields,
         attaches,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -138,7 +139,7 @@ describe('Test video captions API validator', function () {
     //     token: server.accessToken,
     //     fields,
     //     attaches,
-    //     statusCodeExpected: 400
+    //     statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
     //   })
     // })
 
@@ -151,7 +152,7 @@ describe('Test video captions API validator', function () {
     //     videoId: videoUUID,
     //     fixture: 'subtitle-bad.txt',
     //     mimeType: 'application/octet-stream',
-    //     statusCodeExpected: 400
+    //     statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
     //   })
     // })
 
@@ -180,7 +181,7 @@ describe('Test video captions API validator', function () {
     //     token: server.accessToken,
     //     fields,
     //     attaches,
-    //     statusCodeExpected: 500
+    //     statusCodeExpected: HttpStatusCode.INTERNAL_SERVER_ERROR_500
     //   })
     // })
 
@@ -193,7 +194,7 @@ describe('Test video captions API validator', function () {
         token: server.accessToken,
         fields,
         attaches,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
@@ -204,11 +205,15 @@ describe('Test video captions API validator', function () {
     })
 
     it('Should fail with an unknown id', async function () {
-      await makeGetRequest({ url: server.url, path: path + '4da6fde3-88f7-4d16-b119-108df5630b06/captions', statusCodeExpected: 404 })
+      await makeGetRequest({
+        url: server.url,
+        path: path + '4da6fde3-88f7-4d16-b119-108df5630b06/captions',
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path: path + videoUUID + '/captions', statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path: path + videoUUID + '/captions', statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -226,7 +231,7 @@ describe('Test video captions API validator', function () {
         url: server.url,
         path: path + '4da6fde3-88f7-4d16-b119-108df5630b06/captions/fr',
         token: server.accessToken,
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -250,22 +255,32 @@ describe('Test video captions API validator', function () {
 
     it('Should fail without access token', async function () {
       const captionPath = path + videoUUID + '/captions/fr'
-      await makeDeleteRequest({ url: server.url, path: captionPath, statusCodeExpected: 401 })
+      await makeDeleteRequest({ url: server.url, path: captionPath, statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with a bad access token', async function () {
       const captionPath = path + videoUUID + '/captions/fr'
-      await makeDeleteRequest({ url: server.url, path: captionPath, token: 'coucou', statusCodeExpected: 401 })
+      await makeDeleteRequest({ url: server.url, path: captionPath, token: 'coucou', statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with another user', async function () {
       const captionPath = path + videoUUID + '/captions/fr'
-      await makeDeleteRequest({ url: server.url, path: captionPath, token: userAccessToken, statusCodeExpected: 403 })
+      await makeDeleteRequest({
+        url: server.url,
+        path: captionPath,
+        token: userAccessToken,
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
+      })
     })
 
     it('Should success with the correct parameters', async function () {
       const captionPath = path + videoUUID + '/captions/fr'
-      await makeDeleteRequest({ url: server.url, path: captionPath, token: server.accessToken, statusCodeExpected: 204 })
+      await makeDeleteRequest({
+        url: server.url,
+        path: captionPath,
+        token: server.accessToken,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
diff --git a/server/tests/api/check-params/video-channels.ts b/server/tests/api/check-params/video-channels.ts
index 2795ad7d5..0dd436426 100644
--- a/server/tests/api/check-params/video-channels.ts
+++ b/server/tests/api/check-params/video-channels.ts
@@ -25,6 +25,7 @@ import {
 } from '../../../../shared/extra-utils/requests/check-api-params'
 import { join } from 'path'
 import { VideoChannelUpdate } from '../../../../shared/models/videos'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -83,14 +84,14 @@ describe('Test video channels API validator', function () {
     })
 
     it('Should fail with a unknown account', async function () {
-      await getAccountVideoChannelsList({ url: server.url, accountName: 'unknown', specialStatus: 404 })
+      await getAccountVideoChannelsList({ url: server.url, accountName: 'unknown', specialStatus: HttpStatusCode.NOT_FOUND_404 })
     })
 
     it('Should succeed with the correct parameters', async function () {
       await makeGetRequest({
         url: server.url,
         path: accountChannelPath,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -109,7 +110,7 @@ describe('Test video channels API validator', function () {
         path: videoChannelPath,
         token: 'none',
         fields: baseCorrectParams,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -154,7 +155,7 @@ describe('Test video channels API validator', function () {
         path: videoChannelPath,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
 
@@ -164,7 +165,7 @@ describe('Test video channels API validator', function () {
         path: videoChannelPath,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 409
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
       })
     })
   })
@@ -188,7 +189,7 @@ describe('Test video channels API validator', function () {
         path,
         token: 'hi',
         fields: baseCorrectParams,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -198,7 +199,7 @@ describe('Test video channels API validator', function () {
         path,
         token: accessTokenUser,
         fields: baseCorrectParams,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -228,7 +229,7 @@ describe('Test video channels API validator', function () {
         path,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
@@ -266,7 +267,7 @@ describe('Test video channels API validator', function () {
         path: path + '/avatar/pick',
         fields,
         attaches,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -281,7 +282,7 @@ describe('Test video channels API validator', function () {
         token: server.accessToken,
         fields,
         attaches,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -291,7 +292,7 @@ describe('Test video channels API validator', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: videoChannelPath,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.body.data).to.be.an('array')
@@ -301,7 +302,7 @@ describe('Test video channels API validator', function () {
       await makeGetRequest({
         url: server.url,
         path: videoChannelPath + '/super_channel2',
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -309,22 +310,22 @@ describe('Test video channels API validator', function () {
       await makeGetRequest({
         url: server.url,
         path: videoChannelPath + '/super_channel',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
 
   describe('When deleting a video channel', function () {
     it('Should fail with a non authenticated user', async function () {
-      await deleteVideoChannel(server.url, 'coucou', 'super_channel', 401)
+      await deleteVideoChannel(server.url, 'coucou', 'super_channel', HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should fail with another authenticated user', async function () {
-      await deleteVideoChannel(server.url, accessTokenUser, 'super_channel', 403)
+      await deleteVideoChannel(server.url, accessTokenUser, 'super_channel', HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with an unknown video channel id', async function () {
-      await deleteVideoChannel(server.url, server.accessToken, 'super_channel2', 404)
+      await deleteVideoChannel(server.url, server.accessToken, 'super_channel2', HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should succeed with the correct parameters', async function () {
@@ -332,7 +333,7 @@ describe('Test video channels API validator', function () {
     })
 
     it('Should fail to delete the last user video channel', async function () {
-      await deleteVideoChannel(server.url, server.accessToken, 'root_channel', 409)
+      await deleteVideoChannel(server.url, server.accessToken, 'root_channel', HttpStatusCode.CONFLICT_409)
     })
   })
 
diff --git a/server/tests/api/check-params/video-comments.ts b/server/tests/api/check-params/video-comments.ts
index 662d4a70d..659a10c41 100644
--- a/server/tests/api/check-params/video-comments.ts
+++ b/server/tests/api/check-params/video-comments.ts
@@ -20,6 +20,7 @@ import {
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
 import { addVideoCommentThread } from '../../../../shared/extra-utils/videos/video-comments'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -83,7 +84,7 @@ describe('Test video comments API validator', function () {
       await makeGetRequest({
         url: server.url,
         path: '/api/v1/videos/ba708d62-e3d7-45d9-9d73-41b9097cc02d/comment-threads',
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
   })
@@ -93,7 +94,7 @@ describe('Test video comments API validator', function () {
       await makeGetRequest({
         url: server.url,
         path: '/api/v1/videos/ba708d62-e3d7-45d9-9d73-41b9097cc02d/comment-threads/' + commentId,
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -101,7 +102,7 @@ describe('Test video comments API validator', function () {
       await makeGetRequest({
         url: server.url,
         path: '/api/v1/videos/' + videoUUID + '/comment-threads/156',
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -109,7 +110,7 @@ describe('Test video comments API validator', function () {
       await makeGetRequest({
         url: server.url,
         path: '/api/v1/videos/' + videoUUID + '/comment-threads/' + commentId,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -120,7 +121,13 @@ describe('Test video comments API validator', function () {
       const fields = {
         text: 'text'
       }
-      await makePostBodyRequest({ url: server.url, path: pathThread, token: 'none', fields, statusCodeExpected: 401 })
+      await makePostBodyRequest({
+        url: server.url,
+        path: pathThread,
+        token: 'none',
+        fields,
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
+      })
     })
 
     it('Should fail with nothing', async function () {
@@ -147,14 +154,26 @@ describe('Test video comments API validator', function () {
       const fields = {
         text: 'super comment'
       }
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 404 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should succeed with the correct parameters', async function () {
       const fields = {
         text: 'super comment'
       }
-      await makePostBodyRequest({ url: server.url, path: pathThread, token: server.accessToken, fields, statusCodeExpected: 200 })
+      await makePostBodyRequest({
+        url: server.url,
+        path: pathThread,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.OK_200
+      })
     })
   })
 
@@ -163,7 +182,13 @@ describe('Test video comments API validator', function () {
       const fields = {
         text: 'text'
       }
-      await makePostBodyRequest({ url: server.url, path: pathComment, token: 'none', fields, statusCodeExpected: 401 })
+      await makePostBodyRequest({
+        url: server.url,
+        path: pathComment,
+        token: 'none',
+        fields,
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
+      })
     })
 
     it('Should fail with nothing', async function () {
@@ -190,7 +215,13 @@ describe('Test video comments API validator', function () {
       const fields = {
         text: 'super comment'
       }
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 404 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should fail with an incorrect comment', async function () {
@@ -198,34 +229,51 @@ describe('Test video comments API validator', function () {
       const fields = {
         text: 'super comment'
       }
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 404 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should succeed with the correct parameters', async function () {
       const fields = {
         text: 'super comment'
       }
-      await makePostBodyRequest({ url: server.url, path: pathComment, token: server.accessToken, fields, statusCodeExpected: 200 })
+      await makePostBodyRequest({
+        url: server.url,
+        path: pathComment,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.OK_200
+      })
     })
   })
 
   describe('When removing video comments', function () {
     it('Should fail with a non authenticated user', async function () {
-      await makeDeleteRequest({ url: server.url, path: pathComment, token: 'none', statusCodeExpected: 401 })
+      await makeDeleteRequest({ url: server.url, path: pathComment, token: 'none', statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with another user', async function () {
-      await makeDeleteRequest({ url: server.url, path: pathComment, token: userAccessToken, statusCodeExpected: 403 })
+      await makeDeleteRequest({
+        url: server.url,
+        path: pathComment,
+        token: userAccessToken,
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
+      })
     })
 
     it('Should fail with an incorrect video', async function () {
       const path = '/api/v1/videos/ba708d62-e3d7-45d9-9d73-41b9097cc02d/comments/' + commentId
-      await makeDeleteRequest({ url: server.url, path, token: server.accessToken, statusCodeExpected: 404 })
+      await makeDeleteRequest({ url: server.url, path, token: server.accessToken, statusCodeExpected: HttpStatusCode.NOT_FOUND_404 })
     })
 
     it('Should fail with an incorrect comment', async function () {
       const path = '/api/v1/videos/' + videoUUID + '/comments/124'
-      await makeDeleteRequest({ url: server.url, path, token: server.accessToken, statusCodeExpected: 404 })
+      await makeDeleteRequest({ url: server.url, path, token: server.accessToken, statusCodeExpected: HttpStatusCode.NOT_FOUND_404 })
     })
 
     it('Should succeed with the same user', async function () {
@@ -238,8 +286,8 @@ describe('Test video comments API validator', function () {
 
       const path = '/api/v1/videos/' + videoUUID + '/comments/' + commentToDelete
 
-      await makeDeleteRequest({ url: server.url, path, token: userAccessToken2, statusCodeExpected: 403 })
-      await makeDeleteRequest({ url: server.url, path, token: userAccessToken, statusCodeExpected: 204 })
+      await makeDeleteRequest({ url: server.url, path, token: userAccessToken2, statusCodeExpected: HttpStatusCode.FORBIDDEN_403 })
+      await makeDeleteRequest({ url: server.url, path, token: userAccessToken, statusCodeExpected: HttpStatusCode.NO_CONTENT_204 })
     })
 
     it('Should succeed with the owner of the video', async function () {
@@ -258,12 +306,17 @@ describe('Test video comments API validator', function () {
 
       const path = '/api/v1/videos/' + anotherVideoUUID + '/comments/' + commentToDelete
 
-      await makeDeleteRequest({ url: server.url, path, token: userAccessToken2, statusCodeExpected: 403 })
-      await makeDeleteRequest({ url: server.url, path, token: userAccessToken, statusCodeExpected: 204 })
+      await makeDeleteRequest({ url: server.url, path, token: userAccessToken2, statusCodeExpected: HttpStatusCode.FORBIDDEN_403 })
+      await makeDeleteRequest({ url: server.url, path, token: userAccessToken, statusCodeExpected: HttpStatusCode.NO_CONTENT_204 })
     })
 
     it('Should succeed with the correct parameters', async function () {
-      await makeDeleteRequest({ url: server.url, path: pathComment, token: server.accessToken, statusCodeExpected: 204 })
+      await makeDeleteRequest({
+        url: server.url,
+        path: pathComment,
+        token: server.accessToken,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
@@ -278,7 +331,7 @@ describe('Test video comments API validator', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: pathThread,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
       expect(res.body.total).to.equal(0)
       expect(res.body.data).to.have.lengthOf(0)
@@ -290,7 +343,13 @@ describe('Test video comments API validator', function () {
       const fields = {
         text: 'super comment'
       }
-      await makePostBodyRequest({ url: server.url, path: pathThread, token: server.accessToken, fields, statusCodeExpected: 409 })
+      await makePostBodyRequest({
+        url: server.url,
+        path: pathThread,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
+      })
     })
 
     it('Should return conflict on comment thread add')
@@ -315,7 +374,7 @@ describe('Test video comments API validator', function () {
       await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -324,7 +383,7 @@ describe('Test video comments API validator', function () {
         url: server.url,
         path,
         token: userAccessToken,
-        statusCodeExpected: 403
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
       })
     })
 
@@ -339,7 +398,7 @@ describe('Test video comments API validator', function () {
           searchAccount: 'toto',
           searchVideo: 'toto'
         },
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
diff --git a/server/tests/api/check-params/video-imports.ts b/server/tests/api/check-params/video-imports.ts
index f954ba089..49ff96117 100644
--- a/server/tests/api/check-params/video-imports.ts
+++ b/server/tests/api/check-params/video-imports.ts
@@ -24,6 +24,7 @@ import {
 } from '../../../../shared/extra-utils/requests/check-api-params'
 import { getMagnetURI, getGoodVideoUrl } from '../../../../shared/extra-utils/videos/video-imports'
 import { VideoPrivacy } from '../../../../shared/models/videos/video-privacy.enum'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test video imports API validator', function () {
   const path = '/api/v1/videos/imports'
@@ -67,7 +68,7 @@ describe('Test video imports API validator', function () {
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path: myPath, statusCodeExpected: 200, token: server.accessToken })
+      await makeGetRequest({ url: server.url, path: myPath, statusCodeExpected: HttpStatusCode.OK_200, token: server.accessToken })
     })
   })
 
@@ -100,7 +101,13 @@ describe('Test video imports API validator', function () {
 
     it('Should fail without a target url', async function () {
       const fields = omit(baseCorrectParams, 'targetUrl')
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 400 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
+      })
     })
 
     it('Should fail with a bad target url', async function () {
@@ -251,7 +258,7 @@ describe('Test video imports API validator', function () {
         path,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
 
@@ -274,7 +281,7 @@ describe('Test video imports API validator', function () {
         path,
         token: server.accessToken,
         fields: baseCorrectParams,
-        statusCodeExpected: 409
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
       })
     })
 
@@ -295,14 +302,27 @@ describe('Test video imports API validator', function () {
       let fields = omit(baseCorrectParams, 'targetUrl')
       fields = immutableAssign(fields, { magnetUri: getMagnetURI() })
 
-      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields, statusCodeExpected: 409 })
+      await makePostBodyRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
+      })
 
       fields = omit(fields, 'magnetUri')
       const attaches = {
         torrentfile: join(__dirname, '..', '..', 'fixtures', 'video-720p.torrent')
       }
 
-      await makeUploadRequest({ url: server.url, path, token: server.accessToken, fields, attaches, statusCodeExpected: 409 })
+      await makeUploadRequest({
+        url: server.url,
+        path,
+        token: server.accessToken,
+        fields,
+        attaches,
+        statusCodeExpected: HttpStatusCode.CONFLICT_409
+      })
     })
   })
 
diff --git a/server/tests/api/check-params/video-playlists.ts b/server/tests/api/check-params/video-playlists.ts
index 179ae9201..418af05d1 100644
--- a/server/tests/api/check-params/video-playlists.ts
+++ b/server/tests/api/check-params/video-playlists.ts
@@ -28,6 +28,7 @@ import {
 } from '../../../../shared/extra-utils/requests/check-api-params'
 import { VideoPlaylistPrivacy } from '../../../../shared/models/videos/playlist/video-playlist-privacy.model'
 import { VideoPlaylistType } from '../../../../shared/models/videos/playlist/video-playlist-type.model'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test video playlists API validator', function () {
   let server: ServerInfo
@@ -114,19 +115,34 @@ describe('Test video playlists API validator', function () {
     it('Should fail with a bad account parameter', async function () {
       const accountPath = '/api/v1/accounts/root2/video-playlists'
 
-      await makeGetRequest({ url: server.url, path: accountPath, statusCodeExpected: 404, token: server.accessToken })
+      await makeGetRequest({
+        url: server.url,
+        path: accountPath,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404,
+        token: server.accessToken
+      })
     })
 
     it('Should fail with a bad video channel parameter', async function () {
       const accountPath = '/api/v1/video-channels/bad_channel/video-playlists'
 
-      await makeGetRequest({ url: server.url, path: accountPath, statusCodeExpected: 404, token: server.accessToken })
+      await makeGetRequest({
+        url: server.url,
+        path: accountPath,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404,
+        token: server.accessToken
+      })
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path: globalPath, statusCodeExpected: 200, token: server.accessToken })
-      await makeGetRequest({ url: server.url, path: accountPath, statusCodeExpected: 200, token: server.accessToken })
-      await makeGetRequest({ url: server.url, path: videoChannelPath, statusCodeExpected: 200, token: server.accessToken })
+      await makeGetRequest({ url: server.url, path: globalPath, statusCodeExpected: HttpStatusCode.OK_200, token: server.accessToken })
+      await makeGetRequest({ url: server.url, path: accountPath, statusCodeExpected: HttpStatusCode.OK_200, token: server.accessToken })
+      await makeGetRequest({
+        url: server.url,
+        path: videoChannelPath,
+        statusCodeExpected: HttpStatusCode.OK_200,
+        token: server.accessToken
+      })
     })
   })
 
@@ -142,17 +158,17 @@ describe('Test video playlists API validator', function () {
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path: path + playlistUUID + '/videos', statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path: path + playlistUUID + '/videos', statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
   describe('When getting a video playlist', function () {
     it('Should fail with a bad id or uuid', async function () {
-      await getVideoPlaylist(server.url, 'toto', 400)
+      await getVideoPlaylist(server.url, 'toto', HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail with an unknown playlist', async function () {
-      await getVideoPlaylist(server.url, 42, 404)
+      await getVideoPlaylist(server.url, 42, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail to get an unlisted playlist with the number id', async function () {
@@ -166,19 +182,19 @@ describe('Test video playlists API validator', function () {
       })
       const playlist = res.body.videoPlaylist
 
-      await getVideoPlaylist(server.url, playlist.id, 404)
-      await getVideoPlaylist(server.url, playlist.uuid, 200)
+      await getVideoPlaylist(server.url, playlist.id, HttpStatusCode.NOT_FOUND_404)
+      await getVideoPlaylist(server.url, playlist.uuid, HttpStatusCode.OK_200)
     })
 
     it('Should succeed with the correct params', async function () {
-      await getVideoPlaylist(server.url, playlistUUID, 200)
+      await getVideoPlaylist(server.url, playlistUUID, HttpStatusCode.OK_200)
     })
   })
 
   describe('When creating/updating a video playlist', function () {
     const getBase = (playlistAttrs: any = {}, wrapper: any = {}) => {
       return Object.assign({
-        expectedStatus: 400,
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400,
         url: server.url,
         token: server.accessToken,
         playlistAttrs: Object.assign({
@@ -194,7 +210,7 @@ describe('Test video playlists API validator', function () {
     }
 
     it('Should fail with an unauthenticated user', async function () {
-      const params = getBase({}, { token: null, expectedStatus: 401 })
+      const params = getBase({}, { token: null, expectedStatus: HttpStatusCode.UNAUTHORIZED_401 })
 
       await createVideoPlaylist(params)
       await updateVideoPlaylist(getUpdate(params, playlistUUID))
@@ -228,7 +244,7 @@ describe('Test video playlists API validator', function () {
     })
 
     it('Should fail with an unknown video channel id', async function () {
-      const params = getBase({ videoChannelId: 42 }, { expectedStatus: 404 })
+      const params = getBase({ videoChannelId: 42 }, { expectedStatus: HttpStatusCode.NOT_FOUND_404 })
 
       await createVideoPlaylist(params)
       await updateVideoPlaylist(getUpdate(params, playlistUUID))
@@ -255,33 +271,33 @@ describe('Test video playlists API validator', function () {
 
     it('Should fail with an unknown playlist to update', async function () {
       await updateVideoPlaylist(getUpdate(
-        getBase({}, { expectedStatus: 404 }),
+        getBase({}, { expectedStatus: HttpStatusCode.NOT_FOUND_404 }),
         42
       ))
     })
 
     it('Should fail to update a playlist of another user', async function () {
       await updateVideoPlaylist(getUpdate(
-        getBase({}, { token: userAccessToken, expectedStatus: 403 }),
+        getBase({}, { token: userAccessToken, expectedStatus: HttpStatusCode.FORBIDDEN_403 }),
         playlistUUID
       ))
     })
 
     it('Should fail to update the watch later playlist', async function () {
       await updateVideoPlaylist(getUpdate(
-        getBase({}, { expectedStatus: 400 }),
+        getBase({}, { expectedStatus: HttpStatusCode.BAD_REQUEST_400 }),
         watchLaterPlaylistId
       ))
     })
 
     it('Should succeed with the correct params', async function () {
       {
-        const params = getBase({}, { expectedStatus: 200 })
+        const params = getBase({}, { expectedStatus: HttpStatusCode.OK_200 })
         await createVideoPlaylist(params)
       }
 
       {
-        const params = getBase({}, { expectedStatus: 204 })
+        const params = getBase({}, { expectedStatus: HttpStatusCode.NO_CONTENT_204 })
         await updateVideoPlaylist(getUpdate(params, playlistUUID))
       }
     })
@@ -290,7 +306,7 @@ describe('Test video playlists API validator', function () {
   describe('When adding an element in a playlist', function () {
     const getBase = (elementAttrs: any = {}, wrapper: any = {}) => {
       return Object.assign({
-        expectedStatus: 400,
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400,
         url: server.url,
         token: server.accessToken,
         playlistId: playlistUUID,
@@ -303,12 +319,12 @@ describe('Test video playlists API validator', function () {
     }
 
     it('Should fail with an unauthenticated user', async function () {
-      const params = getBase({}, { token: null, expectedStatus: 401 })
+      const params = getBase({}, { token: null, expectedStatus: HttpStatusCode.UNAUTHORIZED_401 })
       await addVideoInPlaylist(params)
     })
 
     it('Should fail with the playlist of another user', async function () {
-      const params = getBase({}, { token: userAccessToken, expectedStatus: 403 })
+      const params = getBase({}, { token: userAccessToken, expectedStatus: HttpStatusCode.FORBIDDEN_403 })
       await addVideoInPlaylist(params)
     })
 
@@ -319,13 +335,13 @@ describe('Test video playlists API validator', function () {
       }
 
       {
-        const params = getBase({}, { playlistId: 42, expectedStatus: 404 })
+        const params = getBase({}, { playlistId: 42, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
         await addVideoInPlaylist(params)
       }
     })
 
     it('Should fail with an unknown or incorrect video id', async function () {
-      const params = getBase({ videoId: 42 }, { expectedStatus: 404 })
+      const params = getBase({ videoId: 42 }, { expectedStatus: HttpStatusCode.NOT_FOUND_404 })
       await addVideoInPlaylist(params)
     })
 
@@ -342,7 +358,7 @@ describe('Test video playlists API validator', function () {
     })
 
     it('Succeed with the correct params', async function () {
-      const params = getBase({}, { expectedStatus: 200 })
+      const params = getBase({}, { expectedStatus: HttpStatusCode.OK_200 })
       const res = await addVideoInPlaylist(params)
       playlistElementId = res.body.videoPlaylistElement.id
     })
@@ -359,17 +375,17 @@ describe('Test video playlists API validator', function () {
         }, elementAttrs),
         playlistElementId,
         playlistId: playlistUUID,
-        expectedStatus: 400
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400
       }, wrapper)
     }
 
     it('Should fail with an unauthenticated user', async function () {
-      const params = getBase({}, { token: null, expectedStatus: 401 })
+      const params = getBase({}, { token: null, expectedStatus: HttpStatusCode.UNAUTHORIZED_401 })
       await updateVideoPlaylistElement(params)
     })
 
     it('Should fail with the playlist of another user', async function () {
-      const params = getBase({}, { token: userAccessToken, expectedStatus: 403 })
+      const params = getBase({}, { token: userAccessToken, expectedStatus: HttpStatusCode.FORBIDDEN_403 })
       await updateVideoPlaylistElement(params)
     })
 
@@ -380,7 +396,7 @@ describe('Test video playlists API validator', function () {
       }
 
       {
-        const params = getBase({}, { playlistId: 42, expectedStatus: 404 })
+        const params = getBase({}, { playlistId: 42, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
         await updateVideoPlaylistElement(params)
       }
     })
@@ -392,7 +408,7 @@ describe('Test video playlists API validator', function () {
       }
 
       {
-        const params = getBase({}, { playlistElementId: 42, expectedStatus: 404 })
+        const params = getBase({}, { playlistElementId: 42, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
         await updateVideoPlaylistElement(params)
       }
     })
@@ -410,12 +426,12 @@ describe('Test video playlists API validator', function () {
     })
 
     it('Should fail with an unknown element', async function () {
-      const params = getBase({}, { playlistElementId: 888, expectedStatus: 404 })
+      const params = getBase({}, { playlistElementId: 888, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
       await updateVideoPlaylistElement(params)
     })
 
     it('Succeed with the correct params', async function () {
-      const params = getBase({}, { expectedStatus: 204 })
+      const params = getBase({}, { expectedStatus: HttpStatusCode.NO_CONTENT_204 })
       await updateVideoPlaylistElement(params)
     })
   })
@@ -434,7 +450,7 @@ describe('Test video playlists API validator', function () {
           insertAfterPosition: 2,
           reorderLength: 3
         }, elementAttrs),
-        expectedStatus: 400
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400
       }, wrapper)
     }
 
@@ -453,12 +469,12 @@ describe('Test video playlists API validator', function () {
     })
 
     it('Should fail with an unauthenticated user', async function () {
-      const params = getBase({}, { token: null, expectedStatus: 401 })
+      const params = getBase({}, { token: null, expectedStatus: HttpStatusCode.UNAUTHORIZED_401 })
       await reorderVideosPlaylist(params)
     })
 
     it('Should fail with the playlist of another user', async function () {
-      const params = getBase({}, { token: userAccessToken, expectedStatus: 403 })
+      const params = getBase({}, { token: userAccessToken, expectedStatus: HttpStatusCode.FORBIDDEN_403 })
       await reorderVideosPlaylist(params)
     })
 
@@ -469,7 +485,7 @@ describe('Test video playlists API validator', function () {
       }
 
       {
-        const params = getBase({}, { playlistId: 42, expectedStatus: 404 })
+        const params = getBase({}, { playlistId: 42, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
         await reorderVideosPlaylist(params)
       }
     })
@@ -526,7 +542,7 @@ describe('Test video playlists API validator', function () {
     })
 
     it('Succeed with the correct params', async function () {
-      const params = getBase({}, { expectedStatus: 204 })
+      const params = getBase({}, { expectedStatus: HttpStatusCode.NO_CONTENT_204 })
       await reorderVideosPlaylist(params)
     })
   })
@@ -539,7 +555,7 @@ describe('Test video playlists API validator', function () {
         url: server.url,
         path,
         query: { videoIds: [ 1, 2 ] },
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       })
     })
 
@@ -572,7 +588,7 @@ describe('Test video playlists API validator', function () {
         token: server.accessToken,
         path,
         query: { videoIds: [ 1, 2 ] },
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     })
   })
@@ -584,17 +600,17 @@ describe('Test video playlists API validator', function () {
         token: server.accessToken,
         playlistElementId,
         playlistId: playlistUUID,
-        expectedStatus: 400
+        expectedStatus: HttpStatusCode.BAD_REQUEST_400
       }, wrapper)
     }
 
     it('Should fail with an unauthenticated user', async function () {
-      const params = getBase({ token: null, expectedStatus: 401 })
+      const params = getBase({ token: null, expectedStatus: HttpStatusCode.UNAUTHORIZED_401 })
       await removeVideoFromPlaylist(params)
     })
 
     it('Should fail with the playlist of another user', async function () {
-      const params = getBase({ token: userAccessToken, expectedStatus: 403 })
+      const params = getBase({ token: userAccessToken, expectedStatus: HttpStatusCode.FORBIDDEN_403 })
       await removeVideoFromPlaylist(params)
     })
 
@@ -605,7 +621,7 @@ describe('Test video playlists API validator', function () {
       }
 
       {
-        const params = getBase({ playlistId: 42, expectedStatus: 404 })
+        const params = getBase({ playlistId: 42, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
         await removeVideoFromPlaylist(params)
       }
     })
@@ -617,33 +633,33 @@ describe('Test video playlists API validator', function () {
       }
 
       {
-        const params = getBase({ playlistElementId: 42, expectedStatus: 404 })
+        const params = getBase({ playlistElementId: 42, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
         await removeVideoFromPlaylist(params)
       }
     })
 
     it('Should fail with an unknown element', async function () {
-      const params = getBase({ playlistElementId: 888, expectedStatus: 404 })
+      const params = getBase({ playlistElementId: 888, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
       await removeVideoFromPlaylist(params)
     })
 
     it('Succeed with the correct params', async function () {
-      const params = getBase({ expectedStatus: 204 })
+      const params = getBase({ expectedStatus: HttpStatusCode.NO_CONTENT_204 })
       await removeVideoFromPlaylist(params)
     })
   })
 
   describe('When deleting a playlist', function () {
     it('Should fail with an unknown playlist', async function () {
-      await deleteVideoPlaylist(server.url, server.accessToken, 42, 404)
+      await deleteVideoPlaylist(server.url, server.accessToken, 42, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a playlist of another user', async function () {
-      await deleteVideoPlaylist(server.url, userAccessToken, playlistUUID, 403)
+      await deleteVideoPlaylist(server.url, userAccessToken, playlistUUID, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with the watch later playlist', async function () {
-      await deleteVideoPlaylist(server.url, server.accessToken, watchLaterPlaylistId, 400)
+      await deleteVideoPlaylist(server.url, server.accessToken, watchLaterPlaylistId, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should succeed with the correct params', async function () {
diff --git a/server/tests/api/check-params/videos-filter.ts b/server/tests/api/check-params/videos-filter.ts
index bf8248b0e..2391584a7 100644
--- a/server/tests/api/check-params/videos-filter.ts
+++ b/server/tests/api/check-params/videos-filter.ts
@@ -12,8 +12,9 @@ import {
   userLogin
 } from '../../../../shared/extra-utils'
 import { UserRole } from '../../../../shared/models/users'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
-async function testEndpoints (server: ServerInfo, token: string, filter: string, statusCodeExpected: number) {
+async function testEndpoints (server: ServerInfo, token: string, filter: string, statusCodeExpected: HttpStatusCode) {
   const paths = [
     '/api/v1/video-channels/root_channel/videos',
     '/api/v1/accounts/root/videos',
@@ -71,26 +72,26 @@ describe('Test videos filters', function () {
   describe('When setting a video filter', function () {
 
     it('Should fail with a bad filter', async function () {
-      await testEndpoints(server, server.accessToken, 'bad-filter', 400)
+      await testEndpoints(server, server.accessToken, 'bad-filter', HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should succeed with a good filter', async function () {
-      await testEndpoints(server, server.accessToken, 'local', 200)
+      await testEndpoints(server, server.accessToken, 'local', HttpStatusCode.OK_200)
     })
 
     it('Should fail to list all-local/all with a simple user', async function () {
-      await testEndpoints(server, userAccessToken, 'all-local', 401)
-      await testEndpoints(server, userAccessToken, 'all', 401)
+      await testEndpoints(server, userAccessToken, 'all-local', HttpStatusCode.UNAUTHORIZED_401)
+      await testEndpoints(server, userAccessToken, 'all', HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should succeed to list all-local/all with a moderator', async function () {
-      await testEndpoints(server, moderatorAccessToken, 'all-local', 200)
-      await testEndpoints(server, moderatorAccessToken, 'all', 200)
+      await testEndpoints(server, moderatorAccessToken, 'all-local', HttpStatusCode.OK_200)
+      await testEndpoints(server, moderatorAccessToken, 'all', HttpStatusCode.OK_200)
     })
 
     it('Should succeed to list all-local/all with an admin', async function () {
-      await testEndpoints(server, server.accessToken, 'all-local', 200)
-      await testEndpoints(server, server.accessToken, 'all', 200)
+      await testEndpoints(server, server.accessToken, 'all-local', HttpStatusCode.OK_200)
+      await testEndpoints(server, server.accessToken, 'all', HttpStatusCode.OK_200)
     })
 
     // Because we cannot authenticate the user on the RSS endpoint
@@ -99,7 +100,7 @@ describe('Test videos filters', function () {
         await makeGetRequest({
           url: server.url,
           path: '/feeds/videos.json',
-          statusCodeExpected: 401,
+          statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401,
           query: {
             filter
           }
@@ -111,7 +112,7 @@ describe('Test videos filters', function () {
       await makeGetRequest({
         url: server.url,
         path: '/feeds/videos.json',
-        statusCodeExpected: 200,
+        statusCodeExpected: HttpStatusCode.OK_200,
         query: {
           filter: 'local'
         }
diff --git a/server/tests/api/check-params/videos-history.ts b/server/tests/api/check-params/videos-history.ts
index 941f62654..0e91fe0a8 100644
--- a/server/tests/api/check-params/videos-history.ts
+++ b/server/tests/api/check-params/videos-history.ts
@@ -13,6 +13,7 @@ import {
   setAccessTokensToServers,
   uploadVideo
 } from '../../../../shared/extra-utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test videos history API validator', function () {
   const myHistoryPath = '/api/v1/users/me/history/videos'
@@ -39,31 +40,55 @@ describe('Test videos history API validator', function () {
 
     it('Should fail with an unauthenticated user', async function () {
       const fields = { currentTime: 5 }
-      await makePutBodyRequest({ url: server.url, path: watchingPath, fields, statusCodeExpected: 401 })
+      await makePutBodyRequest({ url: server.url, path: watchingPath, fields, statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with an incorrect video id', async function () {
       const fields = { currentTime: 5 }
       const path = '/api/v1/videos/blabla/watching'
-      await makePutBodyRequest({ url: server.url, path, fields, token: server.accessToken, statusCodeExpected: 400 })
+      await makePutBodyRequest({
+        url: server.url,
+        path,
+        fields,
+        token: server.accessToken,
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
+      })
     })
 
     it('Should fail with an unknown video', async function () {
       const fields = { currentTime: 5 }
       const path = '/api/v1/videos/d91fff41-c24d-4508-8e13-3bd5902c3b02/watching'
 
-      await makePutBodyRequest({ url: server.url, path, fields, token: server.accessToken, statusCodeExpected: 404 })
+      await makePutBodyRequest({
+        url: server.url,
+        path,
+        fields,
+        token: server.accessToken,
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
+      })
     })
 
     it('Should fail with a bad current time', async function () {
       const fields = { currentTime: 'hello' }
-      await makePutBodyRequest({ url: server.url, path: watchingPath, fields, token: server.accessToken, statusCodeExpected: 400 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: watchingPath,
+        fields,
+        token: server.accessToken,
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
+      })
     })
 
     it('Should succeed with the correct parameters', async function () {
       const fields = { currentTime: 5 }
 
-      await makePutBodyRequest({ url: server.url, path: watchingPath, fields, token: server.accessToken, statusCodeExpected: 204 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: watchingPath,
+        fields,
+        token: server.accessToken,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
@@ -77,17 +102,17 @@ describe('Test videos history API validator', function () {
     })
 
     it('Should fail with an unauthenticated user', async function () {
-      await makeGetRequest({ url: server.url, path: myHistoryPath, statusCodeExpected: 401 })
+      await makeGetRequest({ url: server.url, path: myHistoryPath, statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should succeed with the correct params', async function () {
-      await makeGetRequest({ url: server.url, token: server.accessToken, path: myHistoryPath, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, token: server.accessToken, path: myHistoryPath, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
   describe('When removing user videos history', function () {
     it('Should fail with an unauthenticated user', async function () {
-      await makePostBodyRequest({ url: server.url, path: myHistoryPath + '/remove', statusCodeExpected: 401 })
+      await makePostBodyRequest({ url: server.url, path: myHistoryPath + '/remove', statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401 })
     })
 
     it('Should fail with a bad beforeDate parameter', async function () {
@@ -97,7 +122,7 @@ describe('Test videos history API validator', function () {
         token: server.accessToken,
         path: myHistoryRemove,
         fields: body,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -108,7 +133,7 @@ describe('Test videos history API validator', function () {
         token: server.accessToken,
         path: myHistoryRemove,
         fields: body,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
 
@@ -117,7 +142,7 @@ describe('Test videos history API validator', function () {
         url: server.url,
         token: server.accessToken,
         path: myHistoryRemove,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
diff --git a/server/tests/api/check-params/videos.ts b/server/tests/api/check-params/videos.ts
index 0d4665954..d60546917 100644
--- a/server/tests/api/check-params/videos.ts
+++ b/server/tests/api/check-params/videos.ts
@@ -28,6 +28,7 @@ import {
   checkBadSortPagination,
   checkBadStartPagination
 } from '../../../../shared/extra-utils/requests/check-api-params'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -76,11 +77,11 @@ describe('Test videos API validator', function () {
     })
 
     it('Should fail with a bad skipVideos query', async function () {
-      await makeGetRequest({ url: server.url, path, statusCodeExpected: 200, query: { skipCount: 'toto' } })
+      await makeGetRequest({ url: server.url, path, statusCodeExpected: HttpStatusCode.OK_200, query: { skipCount: 'toto' } })
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path, statusCodeExpected: 200, query: { skipCount: false } })
+      await makeGetRequest({ url: server.url, path, statusCodeExpected: HttpStatusCode.OK_200, query: { skipCount: false } })
     })
   })
 
@@ -90,7 +91,7 @@ describe('Test videos API validator', function () {
       await makeGetRequest({
         url: server.url,
         path: join(path, 'search'),
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
@@ -107,7 +108,7 @@ describe('Test videos API validator', function () {
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -127,7 +128,7 @@ describe('Test videos API validator', function () {
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, token: server.accessToken, path, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, token: server.accessToken, path, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -151,7 +152,7 @@ describe('Test videos API validator', function () {
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -175,7 +176,7 @@ describe('Test videos API validator', function () {
     })
 
     it('Should success with the correct parameters', async function () {
-      await makeGetRequest({ url: server.url, path, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path, statusCodeExpected: HttpStatusCode.OK_200 })
     })
   })
 
@@ -408,7 +409,7 @@ describe('Test videos API validator', function () {
           token: server.accessToken,
           fields,
           attaches,
-          statusCodeExpected: 200
+          statusCodeExpected: HttpStatusCode.OK_200
         })
       }
 
@@ -423,7 +424,7 @@ describe('Test videos API validator', function () {
           token: server.accessToken,
           fields,
           attaches,
-          statusCodeExpected: 200
+          statusCodeExpected: HttpStatusCode.OK_200
         })
       }
 
@@ -438,7 +439,7 @@ describe('Test videos API validator', function () {
           token: server.accessToken,
           fields,
           attaches,
-          statusCodeExpected: 200
+          statusCodeExpected: HttpStatusCode.OK_200
         })
       }
     })
@@ -481,7 +482,7 @@ describe('Test videos API validator', function () {
         path: path + '4da6fde3-88f7-4d16-b119-108df5630b06',
         token: server.accessToken,
         fields,
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -630,7 +631,13 @@ describe('Test videos API validator', function () {
     it('Should fail with a video of another user without the appropriate right', async function () {
       const fields = baseCorrectParams
 
-      await makePutBodyRequest({ url: server.url, path: path + videoId, token: userAccessToken, fields, statusCodeExpected: 403 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: path + videoId,
+        token: userAccessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.FORBIDDEN_403
+      })
     })
 
     it('Should fail with a video of another server')
@@ -638,7 +645,13 @@ describe('Test videos API validator', function () {
     it('Should succeed with the correct parameters', async function () {
       const fields = baseCorrectParams
 
-      await makePutBodyRequest({ url: server.url, path: path + videoId, token: server.accessToken, fields, statusCodeExpected: 204 })
+      await makePutBodyRequest({
+        url: server.url,
+        path: path + videoId,
+        token: server.accessToken,
+        fields,
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
+      })
     })
   })
 
@@ -647,7 +660,7 @@ describe('Test videos API validator', function () {
       const res = await makeGetRequest({
         url: server.url,
         path,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.body.data).to.be.an('array')
@@ -655,11 +668,11 @@ describe('Test videos API validator', function () {
     })
 
     it('Should fail without a correct uuid', async function () {
-      await getVideo(server.url, 'coucou', 400)
+      await getVideo(server.url, 'coucou', HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should return 404 with an incorrect video', async function () {
-      await getVideo(server.url, '4da6fde3-88f7-4d16-b119-108df5630b06', 404)
+      await getVideo(server.url, '4da6fde3-88f7-4d16-b119-108df5630b06', HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should succeed with the correct parameters', async function () {
@@ -691,7 +704,7 @@ describe('Test videos API validator', function () {
         path: path + '4da6fde3-88f7-4d16-b119-108df5630b06/rate',
         token: server.accessToken,
         fields,
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     })
 
@@ -711,7 +724,7 @@ describe('Test videos API validator', function () {
         path: path + videoId + '/rate',
         token: server.accessToken,
         fields,
-        statusCodeExpected: 204
+        statusCodeExpected: HttpStatusCode.NO_CONTENT_204
       })
     })
   })
@@ -721,20 +734,20 @@ describe('Test videos API validator', function () {
       await makeDeleteRequest({
         url: server.url,
         path,
-        statusCodeExpected: 400
+        statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
       })
     })
 
     it('Should fail without a correct uuid', async function () {
-      await removeVideo(server.url, server.accessToken, 'hello', 400)
+      await removeVideo(server.url, server.accessToken, 'hello', HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should fail with a video which does not exist', async function () {
-      await removeVideo(server.url, server.accessToken, '4da6fde3-88f7-4d16-b119-108df5630b06', 404)
+      await removeVideo(server.url, server.accessToken, '4da6fde3-88f7-4d16-b119-108df5630b06', HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with a video of another user without the appropriate right', async function () {
-      await removeVideo(server.url, userAccessToken, videoId, 403)
+      await removeVideo(server.url, userAccessToken, videoId, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with a video of another server')
diff --git a/server/tests/api/redundancy/redundancy.ts b/server/tests/api/redundancy/redundancy.ts
index c5037a541..7cfcf70e1 100644
--- a/server/tests/api/redundancy/redundancy.ts
+++ b/server/tests/api/redundancy/redundancy.ts
@@ -41,6 +41,7 @@ import { join } from 'path'
 import { VideoRedundancy, VideoRedundancyStrategy, VideoRedundancyStrategyWithManual } from '../../../../shared/models/redundancy'
 import { getStats } from '../../../../shared/extra-utils/server/stats'
 import { ServerStats } from '../../../../shared/models/server/server-stats.model'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -147,13 +148,13 @@ async function check2Webseeds (videoUUID?: string) {
 
       await makeGetRequest({
         url: servers[0].url,
-        statusCodeExpected: 200,
+        statusCodeExpected: HttpStatusCode.OK_200,
         path: '/static/redundancy/' + `${videoUUID}-${file.resolution.id}.mp4`,
         contentType: null
       })
       await makeGetRequest({
         url: servers[1].url,
-        statusCodeExpected: 200,
+        statusCodeExpected: HttpStatusCode.OK_200,
         path: `/static/webseed/${videoUUID}-${file.resolution.id}.mp4`,
         contentType: null
       })
diff --git a/server/tests/api/users/users.ts b/server/tests/api/users/users.ts
index fe83ca041..cd928b980 100644
--- a/server/tests/api/users/users.ts
+++ b/server/tests/api/users/users.ts
@@ -47,6 +47,7 @@ import { follow } from '../../../../shared/extra-utils/server/follows'
 import { logout, serverLogin, setAccessTokensToServers } from '../../../../shared/extra-utils/users/login'
 import { getMyVideos } from '../../../../shared/extra-utils/videos/videos'
 import { UserAdminFlag } from '../../../../shared/models/users/user-flag.model'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -86,14 +87,14 @@ describe('Test users', function () {
 
     it('Should not login with an invalid client id', async function () {
       const client = { id: 'client', secret: server.client.secret }
-      const res = await login(server.url, client, server.user, 400)
+      const res = await login(server.url, client, server.user, HttpStatusCode.BAD_REQUEST_400)
 
       expect(res.body.error).to.contain('client is invalid')
     })
 
     it('Should not login with an invalid client secret', async function () {
       const client = { id: server.client.id, secret: 'coucou' }
-      const res = await login(server.url, client, server.user, 400)
+      const res = await login(server.url, client, server.user, HttpStatusCode.BAD_REQUEST_400)
 
       expect(res.body.error).to.contain('client is invalid')
     })
@@ -103,14 +104,14 @@ describe('Test users', function () {
 
     it('Should not login with an invalid username', async function () {
       const user = { username: 'captain crochet', password: server.user.password }
-      const res = await login(server.url, server.client, user, 400)
+      const res = await login(server.url, server.client, user, HttpStatusCode.BAD_REQUEST_400)
 
       expect(res.body.error).to.contain('credentials are invalid')
     })
 
     it('Should not login with an invalid password', async function () {
       const user = { username: server.user.username, password: 'mew_three' }
-      const res = await login(server.url, server.client, user, 400)
+      const res = await login(server.url, server.client, user, HttpStatusCode.BAD_REQUEST_400)
 
       expect(res.body.error).to.contain('credentials are invalid')
     })
@@ -119,31 +120,31 @@ describe('Test users', function () {
       accessToken = 'my_super_token'
 
       const videoAttributes = {}
-      await uploadVideo(server.url, accessToken, videoAttributes, 401)
+      await uploadVideo(server.url, accessToken, videoAttributes, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should not be able to follow', async function () {
       accessToken = 'my_super_token'
-      await follow(server.url, [ 'http://example.com' ], accessToken, 401)
+      await follow(server.url, [ 'http://example.com' ], accessToken, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should not be able to unfollow')
 
     it('Should be able to login', async function () {
-      const res = await login(server.url, server.client, server.user, 200)
+      const res = await login(server.url, server.client, server.user, HttpStatusCode.OK_200)
 
       accessToken = res.body.access_token
     })
 
     it('Should be able to login with an insensitive username', async function () {
       const user = { username: 'RoOt', password: server.user.password }
-      await login(server.url, server.client, user, 200)
+      await login(server.url, server.client, user, HttpStatusCode.OK_200)
 
       const user2 = { username: 'rOoT', password: server.user.password }
-      await login(server.url, server.client, user2, 200)
+      await login(server.url, server.client, user2, HttpStatusCode.OK_200)
 
       const user3 = { username: 'ROOt', password: server.user.password }
-      await login(server.url, server.client, user3, 200)
+      await login(server.url, server.client, user3, HttpStatusCode.OK_200)
     })
   })
 
@@ -179,7 +180,7 @@ describe('Test users', function () {
     it('Should retrieve ratings list', async function () {
       await rateVideo(server.url, accessToken, videoId, 'like')
 
-      const res = await getAccountRatings(server.url, server.user.username, server.accessToken, null, 200)
+      const res = await getAccountRatings(server.url, server.user.username, server.accessToken, null, HttpStatusCode.OK_200)
       const ratings = res.body
 
       expect(ratings.total).to.equal(1)
@@ -204,7 +205,7 @@ describe('Test users', function () {
 
   describe('Remove video', function () {
     it('Should not be able to remove the video with an incorrect token', async function () {
-      await removeVideo(server.url, 'bad_token', videoId, 401)
+      await removeVideo(server.url, 'bad_token', videoId, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should not be able to remove the video with the token of another account')
@@ -220,11 +221,11 @@ describe('Test users', function () {
     })
 
     it('Should not be able to get the user information', async function () {
-      await getMyUserInformation(server.url, server.accessToken, 401)
+      await getMyUserInformation(server.url, server.accessToken, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should not be able to upload a video', async function () {
-      await uploadVideo(server.url, server.accessToken, { name: 'video' }, 401)
+      await uploadVideo(server.url, server.accessToken, { name: 'video' }, HttpStatusCode.UNAUTHORIZED_401)
     })
 
     it('Should not be able to rate a video', async function () {
@@ -238,7 +239,7 @@ describe('Test users', function () {
         path: path + videoId,
         token: 'wrong token',
         fields: data,
-        statusCodeExpected: 401
+        statusCodeExpected: HttpStatusCode.UNAUTHORIZED_401
       }
       await makePutBodyRequest(options)
     })
@@ -534,7 +535,7 @@ describe('Test users', function () {
       })
       user.password = 'new password'
 
-      await userLogin(server, user, 200)
+      await userLogin(server, user, HttpStatusCode.OK_200)
     })
 
     it('Should be able to change the NSFW display attribute', async function () {
@@ -732,7 +733,7 @@ describe('Test users', function () {
     })
 
     it('Should have removed the user token', async function () {
-      await getMyUserVideoQuotaUsed(server.url, accessTokenUser, 401)
+      await getMyUserVideoQuotaUsed(server.url, accessTokenUser, HttpStatusCode.UNAUTHORIZED_401)
 
       accessTokenUser = await userLogin(server, user)
     })
@@ -745,9 +746,9 @@ describe('Test users', function () {
         password: 'password updated'
       })
 
-      await getMyUserVideoQuotaUsed(server.url, accessTokenUser, 401)
+      await getMyUserVideoQuotaUsed(server.url, accessTokenUser, HttpStatusCode.UNAUTHORIZED_401)
 
-      await userLogin(server, user, 400)
+      await userLogin(server, user, HttpStatusCode.BAD_REQUEST_400)
 
       user.password = 'password updated'
       accessTokenUser = await userLogin(server, user)
@@ -766,7 +767,7 @@ describe('Test users', function () {
     })
 
     it('Should not be able to login with this user', async function () {
-      await userLogin(server, user, 400)
+      await userLogin(server, user, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should not have videos of this user', async function () {
@@ -852,11 +853,11 @@ describe('Test users', function () {
 
       user16AccessToken = await userLogin(server, user16)
 
-      await getMyUserInformation(server.url, user16AccessToken, 200)
+      await getMyUserInformation(server.url, user16AccessToken, HttpStatusCode.OK_200)
       await blockUser(server.url, user16Id, server.accessToken)
 
-      await getMyUserInformation(server.url, user16AccessToken, 401)
-      await userLogin(server, user16, 400)
+      await getMyUserInformation(server.url, user16AccessToken, HttpStatusCode.UNAUTHORIZED_401)
+      await userLogin(server, user16, HttpStatusCode.BAD_REQUEST_400)
     })
 
     it('Should search user by banned status', async function () {
@@ -884,7 +885,7 @@ describe('Test users', function () {
     it('Should unblock a user', async function () {
       await unblockUser(server.url, user16Id, server.accessToken)
       user16AccessToken = await userLogin(server, user16)
-      await getMyUserInformation(server.url, user16AccessToken, 200)
+      await getMyUserInformation(server.url, user16AccessToken, HttpStatusCode.OK_200)
     })
   })
 
diff --git a/server/tests/api/videos/video-transcoder.ts b/server/tests/api/videos/video-transcoder.ts
index f9500d617..f88c59f0d 100644
--- a/server/tests/api/videos/video-transcoder.ts
+++ b/server/tests/api/videos/video-transcoder.ts
@@ -37,6 +37,7 @@ import {
   getVideoFileFPS,
   getVideoFileResolution
 } from '../../../helpers/ffprobe-utils'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -280,7 +281,7 @@ describe('Test video transcoding', function () {
       expect(videoToFindInList).to.be.undefined
 
       // Server 1 should not have the video yet
-      await getVideo(servers[0].url, videoId, 404)
+      await getVideo(servers[0].url, videoId, HttpStatusCode.NOT_FOUND_404)
     }
 
     await waitJobs(servers)
@@ -400,8 +401,8 @@ describe('Test video transcoding', function () {
 
       expect(videoDetails.files).to.have.lengthOf(1)
 
-      await makeGetRequest({ url: server.url, path: videoDetails.thumbnailPath, statusCodeExpected: 200 })
-      await makeGetRequest({ url: server.url, path: videoDetails.previewPath, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path: videoDetails.thumbnailPath, statusCodeExpected: HttpStatusCode.OK_200 })
+      await makeGetRequest({ url: server.url, path: videoDetails.previewPath, statusCodeExpected: HttpStatusCode.OK_200 })
 
       const magnetUri = videoDetails.files[0].magnetUri
       expect(magnetUri).to.contain('.mp4')
@@ -425,8 +426,8 @@ describe('Test video transcoding', function () {
 
       expect(videoDetails.files).to.have.lengthOf(1)
 
-      await makeGetRequest({ url: server.url, path: videoDetails.thumbnailPath, statusCodeExpected: 200 })
-      await makeGetRequest({ url: server.url, path: videoDetails.previewPath, statusCodeExpected: 200 })
+      await makeGetRequest({ url: server.url, path: videoDetails.thumbnailPath, statusCodeExpected: HttpStatusCode.OK_200 })
+      await makeGetRequest({ url: server.url, path: videoDetails.previewPath, statusCodeExpected: HttpStatusCode.OK_200 })
 
       const magnetUri = videoDetails.files[0].magnetUri
       expect(magnetUri).to.contain('.mp4')
diff --git a/server/tests/api/videos/videos-filter.ts b/server/tests/api/videos/videos-filter.ts
index 6b9a4b6d4..2961c8e78 100644
--- a/server/tests/api/videos/videos-filter.ts
+++ b/server/tests/api/videos/videos-filter.ts
@@ -15,10 +15,11 @@ import {
 } from '../../../../shared/extra-utils'
 import { Video, VideoPrivacy } from '../../../../shared/models/videos'
 import { UserRole } from '../../../../shared/models/users'
+import { HttpStatusCode } from '../../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
-async function getVideosNames (server: ServerInfo, token: string, filter: string, statusCodeExpected = 200) {
+async function getVideosNames (server: ServerInfo, token: string, filter: string, statusCodeExpected = HttpStatusCode.OK_200) {
   const paths = [
     '/api/v1/video-channels/root_channel/videos',
     '/api/v1/accounts/root/videos',
diff --git a/server/tests/cli/prune-storage.ts b/server/tests/cli/prune-storage.ts
index 052a5f91e..591ed217f 100644
--- a/server/tests/cli/prune-storage.ts
+++ b/server/tests/cli/prune-storage.ts
@@ -24,6 +24,7 @@ import { Account, VideoPlaylistPrivacy } from '../../../shared/models'
 import { createFile, readdir } from 'fs-extra'
 import { v4 as uuidv4 } from 'uuid'
 import { join } from 'path'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -98,7 +99,7 @@ describe('Test prune storage scripts', function () {
       await makeGetRequest({
         url: servers[0].url,
         path: account.avatar.path,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     }
 
@@ -108,7 +109,7 @@ describe('Test prune storage scripts', function () {
       await makeGetRequest({
         url: servers[1].url,
         path: account.avatar.path,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
     }
 
diff --git a/server/tests/client.ts b/server/tests/client.ts
index 96821eb6f..6dd4b7cf6 100644
--- a/server/tests/client.ts
+++ b/server/tests/client.ts
@@ -22,6 +22,7 @@ import {
   updateMyUser,
   updateVideoChannel
 } from '../../shared/extra-utils'
+import { HttpStatusCode } from '@shared/core-utils/miscs/http-error-codes'
 
 const expect = chai.expect
 
@@ -100,7 +101,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get(path)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       const port = server.port
 
@@ -115,7 +116,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/videos/watch/playlist/' + playlistUUID)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       const port = server.port
 
@@ -133,7 +134,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/accounts/' + server.user.username)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain(`<meta property="og:title" content="${account.displayName}" />`)
       expect(res.text).to.contain(`<meta property="og:description" content="${account.description}" />`)
@@ -145,7 +146,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/video-channels/' + server.videoChannel.name)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain(`<meta property="og:title" content="${server.videoChannel.displayName}" />`)
       expect(res.text).to.contain(`<meta property="og:description" content="${channelDescription}" />`)
@@ -157,7 +158,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/videos/watch/' + server.video.id)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain(`<meta property="og:title" content="${videoName}" />`)
       expect(res.text).to.contain(`<meta property="og:description" content="${videoDescription}" />`)
@@ -169,7 +170,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/videos/watch/' + server.video.uuid)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain(`<meta property="og:title" content="${videoName}" />`)
       expect(res.text).to.contain(`<meta property="og:description" content="${videoDescription}" />`)
@@ -181,7 +182,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/videos/watch/playlist/' + playlistUUID)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain(`<meta property="og:title" content="${playlistName}" />`)
       expect(res.text).to.contain(`<meta property="og:description" content="${playlistDescription}" />`)
@@ -196,7 +197,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/videos/watch/' + server.video.uuid)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain('<meta property="twitter:card" content="summary_large_image" />')
       expect(res.text).to.contain('<meta property="twitter:site" content="@Chocobozzz" />')
@@ -208,7 +209,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/videos/watch/playlist/' + playlistUUID)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain('<meta property="twitter:card" content="summary" />')
       expect(res.text).to.contain('<meta property="twitter:site" content="@Chocobozzz" />')
@@ -220,7 +221,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/accounts/' + account.name)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain('<meta property="twitter:card" content="summary" />')
       expect(res.text).to.contain('<meta property="twitter:site" content="@Chocobozzz" />')
@@ -232,7 +233,7 @@ describe('Test a client controllers', function () {
       const res = await request(server.url)
         .get('/video-channels/' + server.videoChannel.name)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(res.text).to.contain('<meta property="twitter:card" content="summary" />')
       expect(res.text).to.contain('<meta property="twitter:site" content="@Chocobozzz" />')
@@ -252,7 +253,7 @@ describe('Test a client controllers', function () {
       const resVideoRequest = await request(server.url)
         .get('/videos/watch/' + server.video.uuid)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(resVideoRequest.text).to.contain('<meta property="twitter:card" content="player" />')
       expect(resVideoRequest.text).to.contain('<meta property="twitter:site" content="@Kuja" />')
@@ -260,7 +261,7 @@ describe('Test a client controllers', function () {
       const resVideoPlaylistRequest = await request(server.url)
         .get('/videos/watch/playlist/' + playlistUUID)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(resVideoPlaylistRequest.text).to.contain('<meta property="twitter:card" content="player" />')
       expect(resVideoPlaylistRequest.text).to.contain('<meta property="twitter:site" content="@Kuja" />')
@@ -268,7 +269,7 @@ describe('Test a client controllers', function () {
       const resAccountRequest = await request(server.url)
         .get('/accounts/' + account.name)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(resAccountRequest.text).to.contain('<meta property="twitter:card" content="summary" />')
       expect(resAccountRequest.text).to.contain('<meta property="twitter:site" content="@Kuja" />')
@@ -276,7 +277,7 @@ describe('Test a client controllers', function () {
       const resChannelRequest = await request(server.url)
         .get('/video-channels/' + server.videoChannel.name)
         .set('Accept', 'text/html')
-        .expect(200)
+        .expect(HttpStatusCode.OK_200)
 
       expect(resChannelRequest.text).to.contain('<meta property="twitter:card" content="summary" />')
       expect(resChannelRequest.text).to.contain('<meta property="twitter:site" content="@Kuja" />')
diff --git a/server/tests/external-plugins/auto-mute.ts b/server/tests/external-plugins/auto-mute.ts
index 8ead34a2b..687f56e98 100644
--- a/server/tests/external-plugins/auto-mute.ts
+++ b/server/tests/external-plugins/auto-mute.ts
@@ -25,6 +25,7 @@ import {
   reRunServer,
   ServerInfo
 } from '../../../shared/extra-utils/server/servers'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Official plugin auto-mute', function () {
   const autoMuteListPath = '/plugins/auto-mute/router/api/v1/mute-list'
@@ -178,7 +179,7 @@ describe('Official plugin auto-mute', function () {
     await makeGetRequest({
       url: servers[0].url,
       path: '/plugins/auto-mute/router/api/v1/mute-list',
-      statusCodeExpected: 403
+      statusCodeExpected: HttpStatusCode.FORBIDDEN_403
     })
   })
 
@@ -197,7 +198,7 @@ describe('Official plugin auto-mute', function () {
     await makeGetRequest({
       url: servers[0].url,
       path: '/plugins/auto-mute/router/api/v1/mute-list',
-      statusCodeExpected: 200
+      statusCodeExpected: HttpStatusCode.OK_200
     })
   })
 
@@ -221,7 +222,7 @@ describe('Official plugin auto-mute', function () {
     const res = await makeGetRequest({
       url: servers[0].url,
       path: '/plugins/auto-mute/router/api/v1/mute-list',
-      statusCodeExpected: 200
+      statusCodeExpected: HttpStatusCode.OK_200
     })
 
     const data = res.body.data
diff --git a/server/tests/misc-endpoints.ts b/server/tests/misc-endpoints.ts
index 3d0224323..698d83328 100644
--- a/server/tests/misc-endpoints.ts
+++ b/server/tests/misc-endpoints.ts
@@ -13,6 +13,7 @@ import {
   uploadVideo
 } from '../../shared/extra-utils'
 import { VideoPrivacy } from '../../shared/models/videos'
+import { HttpStatusCode } from '@shared/core-utils'
 
 const expect = chai.expect
 
@@ -32,7 +33,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/.well-known/security.txt',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.text).to.contain('security issue')
@@ -42,7 +43,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/.well-known/nodeinfo',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.body.links).to.be.an('array')
@@ -54,7 +55,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/.well-known/dnt-policy.txt',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.text).to.contain('http://www.w3.org/TR/tracking-dnt')
@@ -64,7 +65,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/.well-known/dnt',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.body.tracking).to.equal('N')
@@ -74,7 +75,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/.well-known/change-password',
-        statusCodeExpected: 302
+        statusCodeExpected: HttpStatusCode.FOUND_302
       })
 
       expect(res.header.location).to.equal('/my-account/settings')
@@ -87,7 +88,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/robots.txt',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.text).to.contain('User-agent')
@@ -97,7 +98,7 @@ describe('Test misc endpoints', function () {
       await makeGetRequest({
         url: server.url,
         path: '/security.txt',
-        statusCodeExpected: 301
+        statusCodeExpected: HttpStatusCode.MOVED_PERMANENTLY_301
       })
     })
 
@@ -105,7 +106,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/nodeinfo/2.0.json',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.body.software.name).to.equal('peertube')
@@ -118,7 +119,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/sitemap.xml',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.text).to.contain('xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"')
@@ -129,7 +130,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/sitemap.xml',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.text).to.contain('xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"')
@@ -152,7 +153,7 @@ describe('Test misc endpoints', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: '/sitemap.xml?t=1', // avoid using cache
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.text).to.contain('xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"')
diff --git a/server/tests/plugins/external-auth.ts b/server/tests/plugins/external-auth.ts
index 6d907cc51..a1b5e8f5d 100644
--- a/server/tests/plugins/external-auth.ts
+++ b/server/tests/plugins/external-auth.ts
@@ -22,6 +22,7 @@ import {
   createUser
 } from '../../../shared/extra-utils'
 import { cleanupTests, flushAndRunServer, ServerInfo, waitUntilLog } from '../../../shared/extra-utils/server/servers'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 async function loginExternal (options: {
   server: ServerInfo
@@ -29,8 +30,8 @@ async function loginExternal (options: {
   authName: string
   username: string
   query?: any
-  statusCodeExpected?: number
-  statusCodeExpectedStep2?: number
+  statusCodeExpected?: HttpStatusCode
+  statusCodeExpectedStep2?: HttpStatusCode
 }) {
   const res = await getExternalAuth({
     url: options.server.url,
@@ -38,10 +39,10 @@ async function loginExternal (options: {
     npmVersion: '0.0.1',
     authName: options.authName,
     query: options.query,
-    statusCodeExpected: options.statusCodeExpected || 302
+    statusCodeExpected: options.statusCodeExpected || HttpStatusCode.FOUND_302
   })
 
-  if (res.status !== 302) return
+  if (res.status !== HttpStatusCode.FOUND_302) return
 
   const location = res.header.location
   const { externalAuthToken } = decodeQueryString(location)
@@ -105,7 +106,7 @@ describe('Test external auth plugins', function () {
       query: {
         username: 'cyan'
       },
-      statusCodeExpected: 302
+      statusCodeExpected: HttpStatusCode.FOUND_302
     })
 
     const location = res.header.location
@@ -120,13 +121,13 @@ describe('Test external auth plugins', function () {
   })
 
   it('Should reject auto external login with a missing or invalid token', async function () {
-    await loginUsingExternalToken(server, 'cyan', '', 400)
-    await loginUsingExternalToken(server, 'cyan', 'blabla', 400)
+    await loginUsingExternalToken(server, 'cyan', '', HttpStatusCode.BAD_REQUEST_400)
+    await loginUsingExternalToken(server, 'cyan', 'blabla', HttpStatusCode.BAD_REQUEST_400)
   })
 
   it('Should reject auto external login with a missing or invalid username', async function () {
-    await loginUsingExternalToken(server, '', externalAuthToken, 400)
-    await loginUsingExternalToken(server, '', externalAuthToken, 400)
+    await loginUsingExternalToken(server, '', externalAuthToken, HttpStatusCode.BAD_REQUEST_400)
+    await loginUsingExternalToken(server, '', externalAuthToken, HttpStatusCode.BAD_REQUEST_400)
   })
 
   it('Should reject auto external login with an expired token', async function () {
@@ -134,7 +135,7 @@ describe('Test external auth plugins', function () {
 
     await wait(5000)
 
-    await loginUsingExternalToken(server, 'cyan', externalAuthToken, 400)
+    await loginUsingExternalToken(server, 'cyan', externalAuthToken, HttpStatusCode.BAD_REQUEST_400)
 
     await waitUntilLog(server, 'expired external auth token')
   })
@@ -202,7 +203,7 @@ describe('Test external auth plugins', function () {
     }
 
     {
-      await refreshToken(server, kefkaRefreshToken, 400)
+      await refreshToken(server, kefkaRefreshToken, HttpStatusCode.BAD_REQUEST_400)
     }
   })
 
@@ -228,7 +229,7 @@ describe('Test external auth plugins', function () {
   it('Should have logged out Cyan', async function () {
     await waitUntilLog(server, 'On logout cyan')
 
-    await getMyUserInformation(server.url, cyanAccessToken, 401)
+    await getMyUserInformation(server.url, cyanAccessToken, HttpStatusCode.UNAUTHORIZED_401)
   })
 
   it('Should login Cyan and keep the old existing profile', async function () {
@@ -261,7 +262,7 @@ describe('Test external auth plugins', function () {
       accessToken: cyanAccessToken,
       email: 'toto@example.com',
       currentPassword: 'toto',
-      statusCodeExpected: 400
+      statusCodeExpected: HttpStatusCode.BAD_REQUEST_400
     })
   })
 
@@ -270,7 +271,7 @@ describe('Test external auth plugins', function () {
 
     await wait(5000)
 
-    await getMyUserInformation(server.url, kefkaAccessToken, 401)
+    await getMyUserInformation(server.url, kefkaAccessToken, HttpStatusCode.UNAUTHORIZED_401)
   })
 
   it('Should unregister external-auth-2 and do not login existing Kefka', async function () {
@@ -281,7 +282,7 @@ describe('Test external auth plugins', function () {
       settings: { disableKefka: true }
     })
 
-    await userLogin(server, { username: 'kefka', password: 'fake' }, 400)
+    await userLogin(server, { username: 'kefka', password: 'fake' }, HttpStatusCode.BAD_REQUEST_400)
 
     await loginExternal({
       server,
@@ -291,7 +292,7 @@ describe('Test external auth plugins', function () {
         username: 'kefka'
       },
       username: 'kefka',
-      statusCodeExpected: 404
+      statusCodeExpected: HttpStatusCode.NOT_FOUND_404
     })
   })
 
@@ -322,12 +323,12 @@ describe('Test external auth plugins', function () {
         username: 'cyan'
       },
       username: 'cyan',
-      statusCodeExpected: 404
+      statusCodeExpected: HttpStatusCode.NOT_FOUND_404
     })
 
-    await userLogin(server, { username: 'cyan', password: null }, 400)
-    await userLogin(server, { username: 'cyan', password: '' }, 400)
-    await userLogin(server, { username: 'cyan', password: 'fake' }, 400)
+    await userLogin(server, { username: 'cyan', password: null }, HttpStatusCode.BAD_REQUEST_400)
+    await userLogin(server, { username: 'cyan', password: '' }, HttpStatusCode.BAD_REQUEST_400)
+    await userLogin(server, { username: 'cyan', password: 'fake' }, HttpStatusCode.BAD_REQUEST_400)
   })
 
   it('Should not login kefka with another plugin', async function () {
@@ -336,7 +337,7 @@ describe('Test external auth plugins', function () {
       npmName: 'test-external-auth-two',
       authName: 'external-auth-4',
       username: 'kefka2',
-      statusCodeExpectedStep2: 400
+      statusCodeExpectedStep2: HttpStatusCode.BAD_REQUEST_400
     })
 
     await loginExternal({
@@ -344,7 +345,7 @@ describe('Test external auth plugins', function () {
       npmName: 'test-external-auth-two',
       authName: 'external-auth-4',
       username: 'kefka',
-      statusCodeExpectedStep2: 400
+      statusCodeExpectedStep2: HttpStatusCode.BAD_REQUEST_400
     })
   })
 
@@ -361,7 +362,7 @@ describe('Test external auth plugins', function () {
       npmName: 'test-external-auth-two',
       authName: 'external-auth-6',
       username: 'existing_user',
-      statusCodeExpectedStep2: 400
+      statusCodeExpectedStep2: HttpStatusCode.BAD_REQUEST_400
     })
   })
 
diff --git a/server/tests/plugins/plugin-helpers.ts b/server/tests/plugins/plugin-helpers.ts
index e76d7917a..c0d95e1e0 100644
--- a/server/tests/plugins/plugin-helpers.ts
+++ b/server/tests/plugins/plugin-helpers.ts
@@ -16,6 +16,7 @@ import {
 } from '../../../shared/extra-utils'
 import { cleanupTests, flushAndRunMultipleServers, ServerInfo, waitUntilLog } from '../../../shared/extra-utils/server/servers'
 import { expect } from 'chai'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 function postCommand (server: ServerInfo, command: string, bodyArg?: object) {
   const body = { command }
@@ -25,7 +26,7 @@ function postCommand (server: ServerInfo, command: string, bodyArg?: object) {
     url: server.url,
     path: '/plugins/test-four/router/commander',
     fields: body,
-    statusCodeExpected: 204
+    statusCodeExpected: HttpStatusCode.NO_CONTENT_204
   })
 }
 
diff --git a/server/tests/plugins/plugin-router.ts b/server/tests/plugins/plugin-router.ts
index cf4130f4b..9e78568cd 100644
--- a/server/tests/plugins/plugin-router.ts
+++ b/server/tests/plugins/plugin-router.ts
@@ -10,6 +10,7 @@ import {
   setAccessTokensToServers, uninstallPlugin
 } from '../../../shared/extra-utils'
 import { expect } from 'chai'
+import { HttpStatusCode } from '../../../shared/core-utils/miscs/http-error-codes'
 
 describe('Test plugin helpers', function () {
   let server: ServerInfo
@@ -36,7 +37,7 @@ describe('Test plugin helpers', function () {
       const res = await makeGetRequest({
         url: server.url,
         path: path + 'ping',
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.body.message).to.equal('pong')
@@ -55,7 +56,7 @@ describe('Test plugin helpers', function () {
         url: server.url,
         path: path + 'form/post/mirror',
         fields: body,
-        statusCodeExpected: 200
+        statusCodeExpected: HttpStatusCode.OK_200
       })
 
       expect(res.body).to.deep.equal(body)
@@ -73,14 +74,14 @@ describe('Test plugin helpers', function () {
       await makeGetRequest({
         url: server.url,
         path: path + 'ping',
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
 
       await makePostBodyRequest({
         url: server.url,
         path: path + 'ping',
         fields: {},
-        statusCodeExpected: 404
+        statusCodeExpected: HttpStatusCode.NOT_FOUND_404
       })
     }
   })