Fix CI using 127.0.0.1 for tests

62 files changed, 312 insertions, 322 deletions

diff --git a/config/test-1.yaml b/config/test-1.yaml
index 1402f3048..1d1020214 100644
--- a/config/test-1.yaml
+++ b/config/test-1.yaml
@@ -2,7 +2,6 @@ listen:
   port: 9001
 
 webserver:
-  hostname: 'localhost'
   port: 9001
 
 database:
diff --git a/config/test-2.yaml b/config/test-2.yaml
index 5d9db762f..d155b017d 100644
--- a/config/test-2.yaml
+++ b/config/test-2.yaml
@@ -2,7 +2,6 @@ listen:
   port: 9002
 
 webserver:
-  hostname: 'localhost'
   port: 9002
 
 database:
diff --git a/config/test-3.yaml b/config/test-3.yaml
index 97fe9cd44..50acf613a 100644
--- a/config/test-3.yaml
+++ b/config/test-3.yaml
@@ -2,7 +2,6 @@ listen:
   port: 9003
 
 webserver:
-  hostname: 'localhost'
   port: 9003
 
 database:
diff --git a/config/test-4.yaml b/config/test-4.yaml
index 328e70fa6..615e288b3 100644
--- a/config/test-4.yaml
+++ b/config/test-4.yaml
@@ -2,7 +2,6 @@ listen:
   port: 9004
 
 webserver:
-  hostname: 'localhost'
   port: 9004
 
 database:
diff --git a/config/test-5.yaml b/config/test-5.yaml
index 3e6ca9c12..447e3862a 100644
--- a/config/test-5.yaml
+++ b/config/test-5.yaml
@@ -2,7 +2,6 @@ listen:
   port: 9005
 
 webserver:
-  hostname: 'localhost'
   port: 9005
 
 database:
diff --git a/config/test-6.yaml b/config/test-6.yaml
index 89a71593f..c077d7e38 100644
--- a/config/test-6.yaml
+++ b/config/test-6.yaml
@@ -2,7 +2,6 @@ listen:
   port: 9006
 
 webserver:
-  hostname: 'localhost'
   port: 9006
 
 database:
diff --git a/config/test.yaml b/config/test.yaml
index 48cf0c0f6..878d68cb9 100644
--- a/config/test.yaml
+++ b/config/test.yaml
@@ -3,6 +3,7 @@ listen:
   port: 9000
 
 webserver:
+  hostname: '127.0.0.1'
   https: false
 
 secrets:
@@ -20,18 +21,18 @@ rates_limit:
     max: 500
 
 database:
-  hostname: 'localhost'
+  hostname: '127.0.0.1'
   port: 5432
 
 redis:
-  hostname: 'localhost'
+  hostname: '127.0.0.1'
 
 smtp:
   hostname: null
   port: 1025
   tls: false
   disable_starttls: true
-  from_address: 'test-admin@localhost'
+  from_address: 'test-admin@127.0.0.1'
   username: null
   password: null
 
diff --git a/scripts/clean/server/test.sh b/scripts/clean/server/test.sh
index 5c30c7639..1f1c9cec0 100755
--- a/scripts/clean/server/test.sh
+++ b/scripts/clean/server/test.sh
@@ -18,11 +18,11 @@ removeFiles () {
 
 dropRedis () {
   port=$((9000+$1))
-  host="localhost"
+  host="127.0.0.1"
 
-  redis-cli -h "$host" KEYS "bull-localhost:$port*" | grep -v empty | xargs -r redis-cli -h "$host" DEL
-  redis-cli -h "$host" KEYS "redis-localhost:$port*" | grep -v empty | xargs -r redis-cli -h "$host" DEL
-  redis-cli -h "$host" KEYS "*redis-localhost:$port-" | grep -v empty | xargs -r redis-cli -h "$host" DEL
+  redis-cli -h "$host" KEYS "bull-127.0.0.1:$port*" | grep -v empty | xargs -r redis-cli -h "$host" DEL
+  redis-cli -h "$host" KEYS "redis-127.0.0.1:$port*" | grep -v empty | xargs -r redis-cli -h "$host" DEL
+  redis-cli -h "$host" KEYS "*redis-127.0.0.1:$port-" | grep -v empty | xargs -r redis-cli -h "$host" DEL
 }
 
 seq=$(seq 1 6)
diff --git a/server/tests/api/activitypub/client.ts b/server/tests/api/activitypub/client.ts
index 90c89138c..572a358a0 100644
--- a/server/tests/api/activitypub/client.ts
+++ b/server/tests/api/activitypub/client.ts
@@ -23,7 +23,7 @@ describe('Test activitypub', function () {
     const object = res.body
 
     expect(object.type).to.equal('Person')
-    expect(object.id).to.equal('http://localhost:' + servers[0].port + '/accounts/root')
+    expect(object.id).to.equal(servers[0].url + '/accounts/root')
     expect(object.name).to.equal('root')
     expect(object.preferredUsername).to.equal('root')
   }
@@ -33,7 +33,7 @@ describe('Test activitypub', function () {
     const object = res.body
 
     expect(object.type).to.equal('Group')
-    expect(object.id).to.equal('http://localhost:' + servers[0].port + '/video-channels/root_channel')
+    expect(object.id).to.equal(servers[0].url + '/video-channels/root_channel')
     expect(object.name).to.equal('Main root channel')
     expect(object.preferredUsername).to.equal('root_channel')
   }
@@ -43,7 +43,7 @@ describe('Test activitypub', function () {
     const object = res.body
 
     expect(object.type).to.equal('Video')
-    expect(object.id).to.equal('http://localhost:' + servers[0].port + '/videos/watch/' + video.uuid)
+    expect(object.id).to.equal(servers[0].url + '/videos/watch/' + video.uuid)
     expect(object.name).to.equal('video')
   }
 
@@ -52,7 +52,7 @@ describe('Test activitypub', function () {
     const object = res.body
 
     expect(object.type).to.equal('Playlist')
-    expect(object.id).to.equal('http://localhost:' + servers[0].port + '/video-playlists/' + playlist.uuid)
+    expect(object.id).to.equal(servers[0].url + '/video-playlists/' + playlist.uuid)
     expect(object.name).to.equal('playlist')
   }
 
@@ -110,7 +110,7 @@ describe('Test activitypub', function () {
   it('Should redirect to the origin video object', async function () {
     const res = await makeActivityPubGetRequest(servers[1].url, '/videos/watch/' + video.uuid, HttpStatusCode.FOUND_302)
 
-    expect(res.header.location).to.equal('http://localhost:' + servers[0].port + '/videos/watch/' + video.uuid)
+    expect(res.header.location).to.equal(servers[0].url + '/videos/watch/' + video.uuid)
   })
 
   it('Should return the watch action', async function () {
diff --git a/server/tests/api/activitypub/fetch.ts b/server/tests/api/activitypub/fetch.ts
index 4edabd1d9..f0caea507 100644
--- a/server/tests/api/activitypub/fetch.ts
+++ b/server/tests/api/activitypub/fetch.ts
@@ -35,13 +35,13 @@ describe('Test ActivityPub fetcher', function () {
     await servers[0].videos.upload({ token: userAccessToken, attributes: { name: 'video user' } })
 
     {
-      const to = 'http://localhost:' + servers[0].port + '/accounts/user1'
-      const value = 'http://localhost:' + servers[1].port + '/accounts/user1'
+      const to = servers[0].url + '/accounts/user1'
+      const value = servers[1].url + '/accounts/user1'
       await servers[0].sql.setActorField(to, 'url', value)
     }
 
     {
-      const value = 'http://localhost:' + servers[2].port + '/videos/watch/' + uuid
+      const value = servers[2].url + '/videos/watch/' + uuid
       await servers[0].sql.setVideoField(uuid, 'url', value)
     }
   })
diff --git a/server/tests/api/activitypub/refresher.ts b/server/tests/api/activitypub/refresher.ts
index 401a09090..4fb22f512 100644
--- a/server/tests/api/activitypub/refresher.ts
+++ b/server/tests/api/activitypub/refresher.ts
@@ -112,16 +112,16 @@ describe('Test AP refresher', function () {
       await wait(10000)
 
       // Change actor name so the remote server returns a 404
-      const to = 'http://localhost:' + servers[1].port + '/accounts/user2'
+      const to = servers[1].url + '/accounts/user2'
       await servers[1].sql.setActorField(to, 'preferredUsername', 'toto')
 
-      await command.get({ accountName: 'user1@localhost:' + servers[1].port })
-      await command.get({ accountName: 'user2@localhost:' + servers[1].port })
+      await command.get({ accountName: 'user1@' + servers[1].host })
+      await command.get({ accountName: 'user2@' + servers[1].host })
 
       await waitJobs(servers)
 
-      await command.get({ accountName: 'user1@localhost:' + servers[1].port, expectedStatus: HttpStatusCode.OK_200 })
-      await command.get({ accountName: 'user2@localhost:' + servers[1].port, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
+      await command.get({ accountName: 'user1@' + servers[1].host, expectedStatus: HttpStatusCode.OK_200 })
+      await command.get({ accountName: 'user2@' + servers[1].host, expectedStatus: HttpStatusCode.NOT_FOUND_404 })
     })
   })
 
diff --git a/server/tests/api/activitypub/security.ts b/server/tests/api/activitypub/security.ts
index 423fefb10..22fae8331 100644
--- a/server/tests/api/activitypub/security.ts
+++ b/server/tests/api/activitypub/security.ts
@@ -11,7 +11,7 @@ import { HttpStatusCode } from '@shared/models'
 import { cleanupTests, createMultipleServers, killallServers, PeerTubeServer } from '@shared/server-commands'
 
 function setKeysOfServer (onServer: PeerTubeServer, ofServer: PeerTubeServer, publicKey: string, privateKey: string) {
-  const url = 'http://localhost:' + ofServer.port + '/accounts/peertube'
+  const url = ofServer.url + '/accounts/peertube'
 
   return Promise.all([
     onServer.sql.setActorField(url, 'publicKey', publicKey),
@@ -20,7 +20,7 @@ function setKeysOfServer (onServer: PeerTubeServer, ofServer: PeerTubeServer, pu
 }
 
 function setUpdatedAtOfServer (onServer: PeerTubeServer, ofServer: PeerTubeServer, updatedAt: string) {
-  const url = 'http://localhost:' + ofServer.port + '/accounts/peertube'
+  const url = ofServer.url + '/accounts/peertube'
 
   return Promise.all([
     onServer.sql.setActorField(url, 'createdAt', updatedAt),
@@ -52,7 +52,7 @@ describe('Test ActivityPub security', function () {
   const baseHttpSignature = () => ({
     algorithm: HTTP_SIGNATURE.ALGORITHM,
     authorizationHeaderName: HTTP_SIGNATURE.HEADER_NAME,
-    keyId: 'acct:peertube@localhost:' + servers[1].port,
+    keyId: 'acct:peertube@' + servers[1].host,
     key: keys.privateKey,
     headers: HTTP_SIGNATURE.HEADERS_TO_SIGN
   })
@@ -69,8 +69,8 @@ describe('Test ActivityPub security', function () {
     await setKeysOfServer(servers[0], servers[1], keys.publicKey, null)
     await setKeysOfServer(servers[1], servers[1], keys.publicKey, keys.privateKey)
 
-    const to = { url: 'http://localhost:' + servers[0].port + '/accounts/peertube' }
-    const by = { url: 'http://localhost:' + servers[1].port + '/accounts/peertube', privateKey: keys.privateKey }
+    const to = { url: servers[0].url + '/accounts/peertube' }
+    const by = { url: servers[1].url + '/accounts/peertube', privateKey: keys.privateKey }
     await makeFollowRequest(to, by)
   })
 
@@ -196,8 +196,8 @@ describe('Test ActivityPub security', function () {
       await setKeysOfServer(servers[1], servers[1], keys.publicKey, keys.privateKey)
       await setKeysOfServer(servers[2], servers[2], keys.publicKey, keys.privateKey)
 
-      const to = { url: 'http://localhost:' + servers[0].port + '/accounts/peertube' }
-      const by = { url: 'http://localhost:' + servers[2].port + '/accounts/peertube', privateKey: keys.privateKey }
+      const to = { url: servers[0].url + '/accounts/peertube' }
+      const by = { url: servers[2].url + '/accounts/peertube', privateKey: keys.privateKey }
       await makeFollowRequest(to, by)
     })
 
@@ -208,9 +208,9 @@ describe('Test ActivityPub security', function () {
       await setKeysOfServer(servers[2], servers[2], invalidKeys.publicKey, invalidKeys.privateKey)
 
       const body = getAnnounceWithoutContext(servers[1])
-      body.actor = 'http://localhost:' + servers[2].port + '/accounts/peertube'
+      body.actor = servers[2].url + '/accounts/peertube'
 
-      const signer: any = { privateKey: invalidKeys.privateKey, url: 'http://localhost:' + servers[2].port + '/accounts/peertube' }
+      const signer: any = { privateKey: invalidKeys.privateKey, url: servers[2].url + '/accounts/peertube' }
       const signedBody = await signAndContextify(signer, body, 'Announce')
 
       const headers = buildGlobalHeaders(signedBody)
@@ -230,12 +230,12 @@ describe('Test ActivityPub security', function () {
       await setKeysOfServer(servers[0], servers[2], keys.publicKey, keys.privateKey)
 
       const body = getAnnounceWithoutContext(servers[1])
-      body.actor = 'http://localhost:' + servers[2].port + '/accounts/peertube'
+      body.actor = servers[2].url + '/accounts/peertube'
 
-      const signer: any = { privateKey: keys.privateKey, url: 'http://localhost:' + servers[2].port + '/accounts/peertube' }
+      const signer: any = { privateKey: keys.privateKey, url: servers[2].url + '/accounts/peertube' }
       const signedBody = await signAndContextify(signer, body, 'Announce')
 
-      signedBody.actor = 'http://localhost:' + servers[2].port + '/account/peertube'
+      signedBody.actor = servers[2].url + '/account/peertube'
 
       const headers = buildGlobalHeaders(signedBody)
 
@@ -251,9 +251,9 @@ describe('Test ActivityPub security', function () {
       this.timeout(10000)
 
       const body = getAnnounceWithoutContext(servers[1])
-      body.actor = 'http://localhost:' + servers[2].port + '/accounts/peertube'
+      body.actor = servers[2].url + '/accounts/peertube'
 
-      const signer: any = { privateKey: keys.privateKey, url: 'http://localhost:' + servers[2].port + '/accounts/peertube' }
+      const signer: any = { privateKey: keys.privateKey, url: servers[2].url + '/accounts/peertube' }
       const signedBody = await signAndContextify(signer, body, 'Announce')
 
       const headers = buildGlobalHeaders(signedBody)
@@ -273,9 +273,9 @@ describe('Test ActivityPub security', function () {
       await setKeysOfServer(servers[2], servers[2], invalidKeys.publicKey, invalidKeys.privateKey)
 
       const body = getAnnounceWithoutContext(servers[1])
-      body.actor = 'http://localhost:' + servers[2].port + '/accounts/peertube'
+      body.actor = servers[2].url + '/accounts/peertube'
 
-      const signer: any = { privateKey: keys.privateKey, url: 'http://localhost:' + servers[2].port + '/accounts/peertube' }
+      const signer: any = { privateKey: keys.privateKey, url: servers[2].url + '/accounts/peertube' }
       const signedBody = await signAndContextify(signer, body, 'Announce')
 
       const headers = buildGlobalHeaders(signedBody)
diff --git a/server/tests/api/check-params/blocklist.ts b/server/tests/api/check-params/blocklist.ts
index f745b9088..169b591a3 100644
--- a/server/tests/api/check-params/blocklist.ts
+++ b/server/tests/api/check-params/blocklist.ts
@@ -163,7 +163,7 @@ describe('Test blocklist API validators', function () {
           await makePostBodyRequest({
             url: server.url,
             path,
-            fields: { host: 'localhost:9002' },
+            fields: { host: '127.0.0.1:9002' },
             expectedStatus: HttpStatusCode.UNAUTHORIZED_401
           })
         })
@@ -173,7 +173,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: server.accessToken,
             path,
-            fields: { host: 'localhost:9003' },
+            fields: { host: '127.0.0.1:9003' },
             expectedStatus: HttpStatusCode.NO_CONTENT_204
           })
         })
@@ -183,7 +183,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: server.accessToken,
             path,
-            fields: { host: 'localhost:' + server.port },
+            fields: { host: server.host },
             expectedStatus: HttpStatusCode.CONFLICT_409
           })
         })
@@ -193,7 +193,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: server.accessToken,
             path,
-            fields: { host: 'localhost:' + servers[1].port },
+            fields: { host: servers[1].host },
             expectedStatus: HttpStatusCode.NO_CONTENT_204
           })
         })
@@ -203,7 +203,7 @@ describe('Test blocklist API validators', function () {
         it('Should fail with an unauthenticated user', async function () {
           await makeDeleteRequest({
             url: server.url,
-            path: path + '/localhost:' + servers[1].port,
+            path: path + '/' + servers[1].host,
             expectedStatus: HttpStatusCode.UNAUTHORIZED_401
           })
         })
@@ -211,7 +211,7 @@ describe('Test blocklist API validators', function () {
         it('Should fail with an unknown server block', async function () {
           await makeDeleteRequest({
             url: server.url,
-            path: path + '/localhost:9004',
+            path: path + '/127.0.0.1:9004',
             token: server.accessToken,
             expectedStatus: HttpStatusCode.NOT_FOUND_404
           })
@@ -220,7 +220,7 @@ describe('Test blocklist API validators', function () {
         it('Should succeed with the correct params', async function () {
           await makeDeleteRequest({
             url: server.url,
-            path: path + '/localhost:' + servers[1].port,
+            path: path + '/' + servers[1].host,
             token: server.accessToken,
             expectedStatus: HttpStatusCode.NO_CONTENT_204
           })
@@ -393,7 +393,7 @@ describe('Test blocklist API validators', function () {
           await makePostBodyRequest({
             url: server.url,
             path,
-            fields: { host: 'localhost:' + servers[1].port },
+            fields: { host: servers[1].host },
             expectedStatus: HttpStatusCode.UNAUTHORIZED_401
           })
         })
@@ -403,7 +403,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: userAccessToken,
             path,
-            fields: { host: 'localhost:' + servers[1].port },
+            fields: { host: servers[1].host },
             expectedStatus: HttpStatusCode.FORBIDDEN_403
           })
         })
@@ -413,7 +413,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: server.accessToken,
             path,
-            fields: { host: 'localhost:9003' },
+            fields: { host: '127.0.0.1:9003' },
             expectedStatus: HttpStatusCode.NO_CONTENT_204
           })
         })
@@ -423,7 +423,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: server.accessToken,
             path,
-            fields: { host: 'localhost:' + server.port },
+            fields: { host: server.host },
             expectedStatus: HttpStatusCode.CONFLICT_409
           })
         })
@@ -433,7 +433,7 @@ describe('Test blocklist API validators', function () {
             url: server.url,
             token: server.accessToken,
             path,
-            fields: { host: 'localhost:' + servers[1].port },
+            fields: { host: servers[1].host },
             expectedStatus: HttpStatusCode.NO_CONTENT_204
           })
         })
@@ -443,7 +443,7 @@ describe('Test blocklist API validators', function () {
         it('Should fail with an unauthenticated user', async function () {
           await makeDeleteRequest({
             url: server.url,
-            path: path + '/localhost:' + servers[1].port,
+            path: path + '/' + servers[1].host,
             expectedStatus: HttpStatusCode.UNAUTHORIZED_401
           })
         })
@@ -451,7 +451,7 @@ describe('Test blocklist API validators', function () {
         it('Should fail with a user without the appropriate rights', async function () {
           await makeDeleteRequest({
             url: server.url,
-            path: path + '/localhost:' + servers[1].port,
+            path: path + '/' + servers[1].host,
             token: userAccessToken,
             expectedStatus: HttpStatusCode.FORBIDDEN_403
           })
@@ -460,7 +460,7 @@ describe('Test blocklist API validators', function () {
         it('Should fail with an unknown server block', async function () {
           await makeDeleteRequest({
             url: server.url,
-            path: path + '/localhost:9004',
+            path: path + '/127.0.0.1:9004',
             token: server.accessToken,
             expectedStatus: HttpStatusCode.NOT_FOUND_404
           })
@@ -469,7 +469,7 @@ describe('Test blocklist API validators', function () {
         it('Should succeed with the correct params', async function () {
           await makeDeleteRequest({
             url: server.url,
-            path: path + '/localhost:' + servers[1].port,
+            path: path + '/' + servers[1].host,
             token: server.accessToken,
             expectedStatus: HttpStatusCode.NO_CONTENT_204
           })
diff --git a/server/tests/api/check-params/contact-form.ts b/server/tests/api/check-params/contact-form.ts
index e82688356..7968ef802 100644
--- a/server/tests/api/check-params/contact-form.ts
+++ b/server/tests/api/check-params/contact-form.ts
@@ -38,7 +38,7 @@ describe('Test contact form API validators', function () {
     await killallServers([ server ])
 
     // Contact form is disabled
-    await server.run({ smtp: { hostname: 'localhost', port: emailPort }, contact_form: { enabled: false } })
+    await server.run({ smtp: { hostname: '127.0.0.1', port: emailPort }, contact_form: { enabled: false } })
     await command.send({ ...defaultBody, expectedStatus: HttpStatusCode.CONFLICT_409 })
   })
 
@@ -48,7 +48,7 @@ describe('Test contact form API validators', function () {
     await killallServers([ server ])
 
     // Email & contact form enabled
-    await server.run({ smtp: { hostname: 'localhost', port: emailPort } })
+    await server.run({ smtp: { hostname: '127.0.0.1', port: emailPort } })
 
     await command.send({ ...defaultBody, fromEmail: 'badEmail', expectedStatus: HttpStatusCode.BAD_REQUEST_400 })
     await command.send({ ...defaultBody, fromEmail: 'badEmail@', expectedStatus: HttpStatusCode.BAD_REQUEST_400 })
diff --git a/server/tests/api/check-params/follows.ts b/server/tests/api/check-params/follows.ts
index 56e9f8d96..3c911dcee 100644
--- a/server/tests/api/check-params/follows.ts
+++ b/server/tests/api/check-params/follows.ts
@@ -48,7 +48,7 @@ describe('Test server follows API validators', function () {
         await makePostBodyRequest({
           url: server.url,
           path,
-          fields: { hosts: [ 'localhost:9002', 'localhost:coucou' ] },
+          fields: { hosts: [ '127.0.0.1:9002', '127.0.0.1:coucou' ] },
           token: server.accessToken,
           expectedStatus: HttpStatusCode.BAD_REQUEST_400
         })
@@ -58,7 +58,7 @@ describe('Test server follows API validators', function () {
         await makePostBodyRequest({
           url: server.url,
           path,
-          fields: { hosts: [ 'localhost:9002', 'http://localhost:9003' ] },
+          fields: { hosts: [ '127.0.0.1:9002', 'http://127.0.0.1:9003' ] },
           token: server.accessToken,
           expectedStatus: HttpStatusCode.BAD_REQUEST_400
         })
@@ -68,7 +68,7 @@ describe('Test server follows API validators', function () {
         await makePostBodyRequest({
           url: server.url,
           path,
-          fields: { urls: [ 'localhost:9002', 'localhost:9002' ] },
+          fields: { urls: [ '127.0.0.1:9002', '127.0.0.1:9002' ] },
           token: server.accessToken,
           expectedStatus: HttpStatusCode.BAD_REQUEST_400
         })
@@ -78,7 +78,7 @@ describe('Test server follows API validators', function () {
         await makePostBodyRequest({
           url: server.url,
           path,
-          fields: { handles: [ 'hello@example.com', 'localhost:9001' ] },
+          fields: { handles: [ 'hello@example.com', '127.0.0.1:9001' ] },
           token: server.accessToken,
           expectedStatus: HttpStatusCode.BAD_REQUEST_400
         })
@@ -98,7 +98,7 @@ describe('Test server follows API validators', function () {
         await makePostBodyRequest({
           url: server.url,
           path,
-          fields: { hosts: [ 'localhost:9002' ] },
+          fields: { hosts: [ '127.0.0.1:9002' ] },
           token: 'fake_token',
           expectedStatus: HttpStatusCode.UNAUTHORIZED_401
         })
@@ -108,7 +108,7 @@ describe('Test server follows API validators', function () {
         await makePostBodyRequest({
           url: server.url,
           path,
-          fields: { hosts: [ 'localhost:9002' ] },
+          fields: { hosts: [ '127.0.0.1:9002' ] },
           token: userAccessToken,
           expectedStatus: HttpStatusCode.FORBIDDEN_403
         })
@@ -217,7 +217,7 @@ describe('Test server follows API validators', function () {
       it('Should fail with an invalid token', async function () {
         await makeDeleteRequest({
           url: server.url,
-          path: path + '/toto@localhost:9002',
+          path: path + '/toto@127.0.0.1:9002',
           token: 'fake_token',
           expectedStatus: HttpStatusCode.UNAUTHORIZED_401
         })
@@ -226,7 +226,7 @@ describe('Test server follows API validators', function () {
       it('Should fail if the user is not an administrator', async function () {
         await makeDeleteRequest({
           url: server.url,
-          path: path + '/toto@localhost:9002',
+          path: path + '/toto@127.0.0.1:9002',
           token: userAccessToken,
           expectedStatus: HttpStatusCode.FORBIDDEN_403
         })
@@ -244,7 +244,7 @@ describe('Test server follows API validators', function () {
       it('Should fail with an unknown follower', async function () {
         await makeDeleteRequest({
           url: server.url,
-          path: path + '/toto@localhost:9003',
+          path: path + '/toto@127.0.0.1:9003',
           token: server.accessToken,
           expectedStatus: HttpStatusCode.NOT_FOUND_404
         })
@@ -257,7 +257,7 @@ describe('Test server follows API validators', function () {
       it('Should fail with an invalid token', async function () {
         await makePostBodyRequest({
           url: server.url,
-          path: path + '/toto@localhost:9002/accept',
+          path: path + '/toto@127.0.0.1:9002/accept',
           token: 'fake_token',
           expectedStatus: HttpStatusCode.UNAUTHORIZED_401
         })
@@ -266,7 +266,7 @@ describe('Test server follows API validators', function () {
       it('Should fail if the user is not an administrator', async function () {
         await makePostBodyRequest({
           url: server.url,
-          path: path + '/toto@localhost:9002/accept',
+          path: path + '/toto@127.0.0.1:9002/accept',
           token: userAccessToken,
           expectedStatus: HttpStatusCode.FORBIDDEN_403
         })
@@ -284,7 +284,7 @@ describe('Test server follows API validators', function () {
       it('Should fail with an unknown follower', async function () {
         await makePostBodyRequest({
           url: server.url,
-          path: path + '/toto@localhost:9003/accept',
+          path: path + '/toto@127.0.0.1:9003/accept',
           token: server.accessToken,
           expectedStatus: HttpStatusCode.NOT_FOUND_404
         })
@@ -297,7 +297,7 @@ describe('Test server follows API validators', function () {
       it('Should fail with an invalid token', async function () {
         await makePostBodyRequest({
           url: server.url,
-          path: path + '/toto@localhost:9002/reject',
+          path: path + '/toto@127.0.0.1:9002/reject',
           token: 'fake_token',
           expectedStatus: HttpStatusCode.UNAUTHORIZED_401
         })
@@ -306,7 +306,7 @@ describe('Test server follows API validators', function () {
       it('Should fail if the user is not an administrator', async function () {
         await makePostBodyRequest({
           url: server.url,
-          path: path + '/toto@localhost:9002/reject',
+          path: path + '/toto@127.0.0.1:9002/reject',
           token: userAccessToken,
           expectedStatus: HttpStatusCode.FORBIDDEN_403
         })
@@ -324,7 +324,7 @@ describe('Test server follows API validators', function () {
       it('Should fail with an unknown follower', async function () {
         await makePostBodyRequest({
           url: server.url,
-          path: path + '/toto@localhost:9003/reject',
+          path: path + '/toto@127.0.0.1:9003/reject',
           token: server.accessToken,
           expectedStatus: HttpStatusCode.NOT_FOUND_404
         })
@@ -337,7 +337,7 @@ describe('Test server follows API validators', function () {
       it('Should fail with an invalid token', async function () {
         await makeDeleteRequest({
           url: server.url,
-          path: path + '/localhost:9002',
+          path: path + '/127.0.0.1:9002',
           token: 'fake_token',
           expectedStatus: HttpStatusCode.UNAUTHORIZED_401
         })
@@ -346,7 +346,7 @@ describe('Test server follows API validators', function () {
       it('Should fail if the user is not an administrator', async function () {
         await makeDeleteRequest({
           url: server.url,
-          path: path + '/localhost:9002',
+          path: path + '/127.0.0.1:9002',
           token: userAccessToken,
           expectedStatus: HttpStatusCode.FORBIDDEN_403
         })
diff --git a/server/tests/api/check-params/redundancy.ts b/server/tests/api/check-params/redundancy.ts
index f45860e02..908407b9a 100644
--- a/server/tests/api/check-params/redundancy.ts
+++ b/server/tests/api/check-params/redundancy.ts
@@ -186,7 +186,7 @@ describe('Test server redundancy API validators', function () {
     it('Should fail with an invalid token', async function () {
       await makePutBodyRequest({
         url: servers[0].url,
-        path: path + '/localhost:' + servers[1].port,
+        path: path + '/' + servers[1].host,
         fields: { redundancyAllowed: true },
         token: 'fake_token',
         expectedStatus: HttpStatusCode.UNAUTHORIZED_401
@@ -196,7 +196,7 @@ describe('Test server redundancy API validators', function () {
     it('Should fail if the user is not an administrator', async function () {
       await makePutBodyRequest({
         url: servers[0].url,
-        path: path + '/localhost:' + servers[1].port,
+        path: path + '/' + servers[1].host,
         fields: { redundancyAllowed: true },
         token: userAccessToken,
         expectedStatus: HttpStatusCode.FORBIDDEN_403
@@ -216,7 +216,7 @@ describe('Test server redundancy API validators', function () {
     it('Should fail without de redundancyAllowed param', async function () {
       await makePutBodyRequest({
         url: servers[0].url,
-        path: path + '/localhost:' + servers[1].port,
+        path: path + '/' + servers[1].host,
         fields: { blabla: true },
         token: servers[0].accessToken,
         expectedStatus: HttpStatusCode.BAD_REQUEST_400
@@ -226,7 +226,7 @@ describe('Test server redundancy API validators', function () {
     it('Should succeed with the correct parameters', async function () {
       await makePutBodyRequest({
         url: servers[0].url,
-        path: path + '/localhost:' + servers[1].port,
+        path: path + '/' + servers[1].host,
         fields: { redundancyAllowed: true },
         token: servers[0].accessToken,
         expectedStatus: HttpStatusCode.NO_CONTENT_204
diff --git a/server/tests/api/check-params/services.ts b/server/tests/api/check-params/services.ts
index 0da675902..d45868f36 100644
--- a/server/tests/api/check-params/services.ts
+++ b/server/tests/api/check-params/services.ts
@@ -76,87 +76,87 @@ describe('Test services API validators', function () {
     })
 
     it('Should fail with an invalid element id', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/blabla`
+      const embedUrl = `${server.url}/videos/watch/blabla`
       await checkParamEmbed(server, embedUrl)
     })
 
     it('Should fail with an unknown element', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/88fc0165-d1f0-4a35-a51a-3b47f668689c`
+      const embedUrl = `${server.url}/videos/watch/88fc0165-d1f0-4a35-a51a-3b47f668689c`
       await checkParamEmbed(server, embedUrl, HttpStatusCode.NOT_FOUND_404)
     })
 
     it('Should fail with an invalid path', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watchs/${server.store.videoCreated.uuid}`
+      const embedUrl = `${server.url}/videos/watchs/${server.store.videoCreated.uuid}`
 
       await checkParamEmbed(server, embedUrl)
     })
 
     it('Should fail with an invalid max height', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/${server.store.videoCreated.uuid}`
+      const embedUrl = `${server.url}/videos/watch/${server.store.videoCreated.uuid}`
 
       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.store.videoCreated.uuid}`
+      const embedUrl = `${server.url}/videos/watch/${server.store.videoCreated.uuid}`
 
       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.store.videoCreated.uuid}`
+      const embedUrl = `${server.url}/videos/watch/${server.store.videoCreated.uuid}`
 
       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.store.videoCreated.uuid}`
+      const embedUrl = `${server.url}/videos/watch/${server.store.videoCreated.uuid}`
 
       await checkParamEmbed(server, embedUrl, HttpStatusCode.NOT_IMPLEMENTED_501, { format: 'xml' })
     })
 
     it('Should fail with a private video', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/${privateVideo.uuid}`
+      const embedUrl = `${server.url}/videos/watch/${privateVideo.uuid}`
 
       await checkParamEmbed(server, embedUrl, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with an unlisted video with the int id', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/${unlistedVideo.id}`
+      const embedUrl = `${server.url}/videos/watch/${unlistedVideo.id}`
 
       await checkParamEmbed(server, embedUrl, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should succeed with an unlisted video using the uuid id', async function () {
       for (const uuid of [ unlistedVideo.uuid, unlistedVideo.shortUUID ]) {
-        const embedUrl = `http://localhost:${server.port}/videos/watch/${uuid}`
+        const embedUrl = `${server.url}/videos/watch/${uuid}`
 
         await checkParamEmbed(server, embedUrl, HttpStatusCode.OK_200)
       }
     })
 
     it('Should fail with a private playlist', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/playlist/${privatePlaylist.uuid}`
+      const embedUrl = `${server.url}/videos/watch/playlist/${privatePlaylist.uuid}`
 
       await checkParamEmbed(server, embedUrl, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should fail with an unlisted playlist using the int id', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/playlist/${unlistedPlaylist.id}`
+      const embedUrl = `${server.url}/videos/watch/playlist/${unlistedPlaylist.id}`
 
       await checkParamEmbed(server, embedUrl, HttpStatusCode.FORBIDDEN_403)
     })
 
     it('Should succeed with an unlisted playlist using the uuid id', async function () {
       for (const uuid of [ unlistedPlaylist.uuid, unlistedPlaylist.shortUUID ]) {
-        const embedUrl = `http://localhost:${server.port}/videos/watch/playlist/${uuid}`
+        const embedUrl = `${server.url}/videos/watch/playlist/${uuid}`
 
         await checkParamEmbed(server, embedUrl, HttpStatusCode.OK_200)
       }
     })
 
     it('Should succeed with the correct params with a video', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/${server.store.videoCreated.uuid}`
+      const embedUrl = `${server.url}/videos/watch/${server.store.videoCreated.uuid}`
       const query = {
         format: 'json',
         maxheight: 400,
@@ -167,7 +167,7 @@ describe('Test services API validators', function () {
     })
 
     it('Should succeed with the correct params with a playlist', async function () {
-      const embedUrl = `http://localhost:${server.port}/videos/watch/playlist/${playlistUUID}`
+      const embedUrl = `${server.url}/videos/watch/playlist/${playlistUUID}`
       const query = {
         format: 'json',
         maxheight: 400,
diff --git a/server/tests/api/check-params/user-notifications.ts b/server/tests/api/check-params/user-notifications.ts
index 7de2fda79..6a588e446 100644
--- a/server/tests/api/check-params/user-notifications.ts
+++ b/server/tests/api/check-params/user-notifications.ts
@@ -233,7 +233,7 @@ describe('Test user notifications API validators', function () {
   describe('When connecting to my notification socket', function () {
 
     it('Should fail with no token', function (next) {
-      const socket = io(`http://localhost:${server.port}/user-notifications`, { reconnection: false })
+      const socket = io(`${server.url}/user-notifications`, { reconnection: false })
 
       socket.once('connect_error', function () {
         socket.disconnect()
@@ -247,7 +247,7 @@ describe('Test user notifications API validators', function () {
     })
 
     it('Should fail with an invalid token', function (next) {
-      const socket = io(`http://localhost:${server.port}/user-notifications`, {
+      const socket = io(`${server.url}/user-notifications`, {
         query: { accessToken: 'bad_access_token' },
         reconnection: false
       })
@@ -264,7 +264,7 @@ describe('Test user notifications API validators', function () {
     })
 
     it('Should success with the correct token', function (next) {
-      const socket = io(`http://localhost:${server.port}/user-notifications`, {
+      const socket = io(`${server.url}/user-notifications`, {
         query: { accessToken: server.accessToken },
         reconnection: false
       })
diff --git a/server/tests/api/check-params/user-subscriptions.ts b/server/tests/api/check-params/user-subscriptions.ts
index a0e663e25..c4922c7a2 100644
--- a/server/tests/api/check-params/user-subscriptions.ts
+++ b/server/tests/api/check-params/user-subscriptions.ts
@@ -104,7 +104,7 @@ describe('Test user subscriptions API validators', function () {
       await makePostBodyRequest({
         url: server.url,
         path,
-        fields: { uri: 'user1_channel@localhost:' + server.port },
+        fields: { uri: 'user1_channel@' + server.host },
         expectedStatus: HttpStatusCode.UNAUTHORIZED_401
       })
     })
@@ -142,7 +142,7 @@ describe('Test user subscriptions API validators', function () {
         url: server.url,
         path,
         token: server.accessToken,
-        fields: { uri: 'user1_channel@localhost:' + server.port },
+        fields: { uri: 'user1_channel@' + server.host },
         expectedStatus: HttpStatusCode.NO_CONTENT_204
       })
 
@@ -154,7 +154,7 @@ describe('Test user subscriptions API validators', function () {
     it('Should fail with a non authenticated user', async function () {
       await makeGetRequest({
         url: server.url,
-        path: path + '/user1_channel@localhost:' + server.port,
+        path: path + '/user1_channel@' + server.host,
         expectedStatus: HttpStatusCode.UNAUTHORIZED_401
       })
     })
@@ -185,7 +185,7 @@ describe('Test user subscriptions API validators', function () {
     it('Should fail with an unknown subscription', async function () {
       await makeGetRequest({
         url: server.url,
-        path: path + '/root1@localhost:' + server.port,
+        path: path + '/root1@' + server.host,
         token: server.accessToken,
         expectedStatus: HttpStatusCode.NOT_FOUND_404
       })
@@ -194,7 +194,7 @@ describe('Test user subscriptions API validators', function () {
     it('Should succeed with the correct parameters', async function () {
       await makeGetRequest({
         url: server.url,
-        path: path + '/user1_channel@localhost:' + server.port,
+        path: path + '/user1_channel@' + server.host,
         token: server.accessToken,
         expectedStatus: HttpStatusCode.OK_200
       })
@@ -234,7 +234,7 @@ describe('Test user subscriptions API validators', function () {
       await makeGetRequest({
         url: server.url,
         path: existPath,
-        query: { 'uris[]': 'coucou@localhost:' + server.port },
+        query: { 'uris[]': 'coucou@' + server.host },
         token: server.accessToken,
         expectedStatus: HttpStatusCode.OK_200
       })
@@ -245,7 +245,7 @@ describe('Test user subscriptions API validators', function () {
     it('Should fail with a non authenticated user', async function () {
       await makeDeleteRequest({
         url: server.url,
-        path: path + '/user1_channel@localhost:' + server.port,
+        path: path + '/user1_channel@' + server.host,
         expectedStatus: HttpStatusCode.UNAUTHORIZED_401
       })
     })
@@ -276,7 +276,7 @@ describe('Test user subscriptions API validators', function () {
     it('Should fail with an unknown subscription', async function () {
       await makeDeleteRequest({
         url: server.url,
-        path: path + '/root1@localhost:' + server.port,
+        path: path + '/root1@' + server.host,
         token: server.accessToken,
         expectedStatus: HttpStatusCode.NOT_FOUND_404
       })
@@ -285,7 +285,7 @@ describe('Test user subscriptions API validators', function () {
     it('Should succeed with the correct parameters', async function () {
       await makeDeleteRequest({
         url: server.url,
-        path: path + '/user1_channel@localhost:' + server.port,
+        path: path + '/user1_channel@' + server.host,
         token: server.accessToken,
         expectedStatus: HttpStatusCode.NO_CONTENT_204
       })
diff --git a/server/tests/api/check-params/users-admin.ts b/server/tests/api/check-params/users-admin.ts
index d941ca024..7ba709c4a 100644
--- a/server/tests/api/check-params/users-admin.ts
+++ b/server/tests/api/check-params/users-admin.ts
@@ -158,7 +158,7 @@ describe('Test users admin API validators', function () {
 
       const config = {
         smtp: {
-          hostname: 'localhost',
+          hostname: '127.0.0.1',
           port: emailPort
         }
       }
diff --git a/server/tests/api/moderation/blocklist.ts b/server/tests/api/moderation/blocklist.ts
index 27592e8c5..47d29e7f8 100644
--- a/server/tests/api/moderation/blocklist.ts
+++ b/server/tests/api/moderation/blocklist.ts
@@ -154,7 +154,7 @@ describe('Test blocklist', function () {
       })
 
       it('Should block a remote account', async function () {
-        await command.addToMyBlocklist({ account: 'user2@localhost:' + servers[1].port })
+        await command.addToMyBlocklist({ account: 'user2@' + servers[1].host })
       })
 
       it('Should hide its videos', async function () {
@@ -217,7 +217,7 @@ describe('Test blocklist', function () {
             server: servers[0],
             token: userToken1,
             videoUUID: videoUUID2,
-            text: 'hello @root@localhost:' + servers[0].port
+            text: 'hello @root@' + servers[0].host
           }
           await checkCommentNotification(servers[0], comment, 'absence')
         }
@@ -237,7 +237,7 @@ describe('Test blocklist', function () {
           expect(block.byAccount.name).to.equal('root')
           expect(block.blockedAccount.displayName).to.equal('user2')
           expect(block.blockedAccount.name).to.equal('user2')
-          expect(block.blockedAccount.host).to.equal('localhost:' + servers[1].port)
+          expect(block.blockedAccount.host).to.equal('' + servers[1].host)
         }
 
         {
@@ -249,7 +249,7 @@ describe('Test blocklist', function () {
           expect(block.byAccount.name).to.equal('root')
           expect(block.blockedAccount.displayName).to.equal('user1')
           expect(block.blockedAccount.name).to.equal('user1')
-          expect(block.blockedAccount.host).to.equal('localhost:' + servers[0].port)
+          expect(block.blockedAccount.host).to.equal('' + servers[0].host)
         }
       })
 
@@ -347,7 +347,7 @@ describe('Test blocklist', function () {
       })
 
       it('Should unblock the remote account', async function () {
-        await command.removeFromMyBlocklist({ account: 'user2@localhost:' + servers[1].port })
+        await command.removeFromMyBlocklist({ account: 'user2@' + servers[1].host })
       })
 
       it('Should display its videos', async function () {
@@ -401,7 +401,7 @@ describe('Test blocklist', function () {
             server: servers[0],
             token: userToken1,
             videoUUID: videoUUID2,
-            text: 'hello @root@localhost:' + servers[0].port
+            text: 'hello @root@' + servers[0].host
           }
           await checkCommentNotification(servers[0], comment, 'presence')
         }
@@ -419,7 +419,7 @@ describe('Test blocklist', function () {
       })
 
       it('Should block a remote server', async function () {
-        await command.addToMyBlocklist({ server: 'localhost:' + servers[1].port })
+        await command.addToMyBlocklist({ server: '' + servers[1].host })
       })
 
       it('Should hide its videos', async function () {
@@ -463,7 +463,7 @@ describe('Test blocklist', function () {
             server: servers[1],
             token: userToken2,
             videoUUID: videoUUID1,
-            text: 'hello @root@localhost:' + servers[0].port
+            text: 'hello @root@' + servers[0].host
           }
           await checkCommentNotification(servers[0], comment, 'absence')
         }
@@ -476,7 +476,7 @@ describe('Test blocklist', function () {
         const block = body.data[0]
         expect(block.byAccount.displayName).to.equal('root')
         expect(block.byAccount.name).to.equal('root')
-        expect(block.blockedServer.host).to.equal('localhost:' + servers[1].port)
+        expect(block.blockedServer.host).to.equal('' + servers[1].host)
       })
 
       it('Should search blocked servers', async function () {
@@ -516,7 +516,7 @@ describe('Test blocklist', function () {
       })
 
       it('Should unblock the remote server', async function () {
-        await command.removeFromMyBlocklist({ server: 'localhost:' + servers[1].port })
+        await command.removeFromMyBlocklist({ server: '' + servers[1].host })
       })
 
       it('Should display its videos', function () {
@@ -540,7 +540,7 @@ describe('Test blocklist', function () {
             server: servers[1],
             token: userToken2,
             videoUUID: videoUUID1,
-            text: 'hello @root@localhost:' + servers[0].port
+            text: 'hello @root@' + servers[0].host
           }
           await checkCommentNotification(servers[0], comment, 'presence')
         }
@@ -564,7 +564,7 @@ describe('Test blocklist', function () {
       })
 
       it('Should block a remote account', async function () {
-        await command.addToServerBlocklist({ account: 'user2@localhost:' + servers[1].port })
+        await command.addToServerBlocklist({ account: 'user2@' + servers[1].host })
       })
 
       it('Should hide its videos', async function () {
@@ -624,7 +624,7 @@ describe('Test blocklist', function () {
             server: servers[1],
             token: userToken2,
             videoUUID: videoUUID1,
-            text: 'hello @root@localhost:' + servers[0].port
+            text: 'hello @root@' + servers[0].host
           }
           await checkCommentNotification(servers[0], comment, 'absence')
         }
@@ -640,7 +640,7 @@ describe('Test blocklist', function () {
           expect(block.byAccount.name).to.equal('peertube')
           expect(block.blockedAccount.displayName).to.equal('user2')
           expect(block.blockedAccount.name).to.equal('user2')
-          expect(block.blockedAccount.host).to.equal('localhost:' + servers[1].port)
+          expect(block.blockedAccount.host).to.equal('' + servers[1].host)
         }
 
         {
@@ -652,7 +652,7 @@ describe('Test blocklist', function () {
           expect(block.byAccount.name).to.equal('peertube')
           expect(block.blockedAccount.displayName).to.equal('user1')
           expect(block.blockedAccount.name).to.equal('user1')
-          expect(block.blockedAccount.host).to.equal('localhost:' + servers[0].port)
+          expect(block.blockedAccount.host).to.equal('' + servers[0].host)
         }
       })
 
@@ -685,7 +685,7 @@ describe('Test blocklist', function () {
       })
 
       it('Should unblock the remote account', async function () {
-        await command.removeFromServerBlocklist({ account: 'user2@localhost:' + servers[1].port })
+        await command.removeFromServerBlocklist({ account: 'user2@' + servers[1].host })
       })
 
       it('Should display its videos', async function () {
@@ -721,7 +721,7 @@ describe('Test blocklist', function () {
             server: servers[1],
             token: userToken2,
             videoUUID: videoUUID1,
-            text: 'hello @root@localhost:' + servers[0].port
+            text: 'hello @root@' + servers[0].host
           }
           await checkCommentNotification(servers[0], comment, 'presence')
         }
@@ -743,7 +743,7 @@ describe('Test blocklist', function () {
       })
 
       it('Should block a remote server', async function () {
-        await command.addToServerBlocklist({ server: 'localhost:' + servers[1].port })
+        await command.addToServerBlocklist({ server: '' + servers[1].host })
       })
 
       it('Should hide its videos', async function () {
@@ -791,7 +791,7 @@ describe('Test blocklist', function () {
             server: servers[1],
             token: userToken2,
             videoUUID: videoUUID1,
-            text: 'hello @root@localhost:' + servers[0].port
+            text: 'hello @root@' + servers[0].host
           }
           await checkCommentNotification(servers[0], comment, 'absence')
         }
@@ -820,7 +820,7 @@ describe('Test blocklist', function () {
         const block = body.data[0]
         expect(block.byAccount.displayName).to.equal('peertube')
         expect(block.byAccount.name).to.equal('peertube')
-        expect(block.blockedServer.host).to.equal('localhost:' + servers[1].port)
+        expect(block.blockedServer.host).to.equal('' + servers[1].host)
       })
 
       it('Should search blocked servers', async function () {
@@ -848,7 +848,7 @@ describe('Test blocklist', function () {
       })
 
       it('Should unblock the remote server', async function () {
-        await command.removeFromServerBlocklist({ server: 'localhost:' + servers[1].port })
+        await command.removeFromServerBlocklist({ server: '' + servers[1].host })
       })
 
       it('Should list all videos', async function () {
@@ -876,7 +876,7 @@ describe('Test blocklist', function () {
             server: servers[1],
             token: userToken2,
             videoUUID: videoUUID1,
-            text: 'hello @root@localhost:' + servers[0].port
+            text: 'hello @root@' + servers[0].host
           }
           await checkCommentNotification(servers[0], comment, 'presence')
         }
diff --git a/server/tests/api/notifications/admin-notifications.ts b/server/tests/api/notifications/admin-notifications.ts
index 07c981a37..6f059f622 100644
--- a/server/tests/api/notifications/admin-notifications.ts
+++ b/server/tests/api/notifications/admin-notifications.ts
@@ -31,7 +31,7 @@ describe('Test admin notifications', function () {
       peertube: {
         check_latest_version: {
           enabled: true,
-          url: `http://localhost:${port}/versions.json`
+          url: `http://127.0.0.1:${port}/versions.json`
         }
       },
       plugins: {
diff --git a/server/tests/api/notifications/comments-notifications.ts b/server/tests/api/notifications/comments-notifications.ts
index 8b8c5712a..5a50af040 100644
--- a/server/tests/api/notifications/comments-notifications.ts
+++ b/server/tests/api/notifications/comments-notifications.ts
@@ -257,7 +257,7 @@ describe('Test comments notifications', function () {
 
       await waitJobs(servers)
 
-      const text1 = `hello @user_1@localhost:${servers[0].port} 1`
+      const text1 = `hello @user_1@${servers[0].host} 1`
       const { id: server2ThreadId } = await servers[1].comments.createThread({ videoId: uuid, text: text1 })
 
       await waitJobs(servers)
@@ -269,7 +269,7 @@ describe('Test comments notifications', function () {
       const threadId = data[0].id
       await checkCommentMention({ ...baseParams, shortUUID, commentId: threadId, threadId, byAccountDisplayName, checkType: 'presence' })
 
-      const text2 = `@user_1@localhost:${servers[0].port} hello 2 @root@localhost:${servers[0].port}`
+      const text2 = `@user_1@${servers[0].host} hello 2 @root@${servers[0].host}`
       await servers[1].comments.addReply({ videoId: uuid, toCommentId: server2ThreadId, text: text2 })
 
       await waitJobs(servers)
diff --git a/server/tests/api/notifications/moderation-notifications.ts b/server/tests/api/notifications/moderation-notifications.ts
index 5a632fb22..b127a7a31 100644
--- a/server/tests/api/notifications/moderation-notifications.ts
+++ b/server/tests/api/notifications/moderation-notifications.ts
@@ -373,7 +373,7 @@ describe('Test moderation notifications', function () {
         followings: {
           instance: {
             autoFollowIndex: {
-              indexUrl: `http://localhost:${port}/api/v1/instances/hosts`,
+              indexUrl: `http://127.0.0.1:${port}/api/v1/instances/hosts`,
               enabled: true
             }
           }
@@ -388,10 +388,10 @@ describe('Test moderation notifications', function () {
 
       await waitJobs(servers)
 
-      await checkNewInstanceFollower({ ...baseParams, followerHost: 'localhost:' + servers[2].port, checkType: 'presence' })
+      await checkNewInstanceFollower({ ...baseParams, followerHost: servers[2].host, checkType: 'presence' })
 
       const userOverride = { socketNotifications: userNotifications, token: userToken1, check: { web: true, mail: false } }
-      await checkNewInstanceFollower({ ...baseParams, ...userOverride, followerHost: 'localhost:' + servers[2].port, checkType: 'absence' })
+      await checkNewInstanceFollower({ ...baseParams, ...userOverride, followerHost: servers[2].host, checkType: 'absence' })
     })
 
     it('Should send a notification on auto follow back', async function () {
@@ -495,8 +495,8 @@ describe('Test moderation notifications', function () {
       autoBlacklistTestsCustomConfig.transcoding.enabled = true
       await servers[0].config.updateCustomConfig({ newCustomConfig: autoBlacklistTestsCustomConfig })
 
-      await servers[0].subscriptions.add({ targetUri: 'user_1_channel@localhost:' + servers[0].port })
-      await servers[1].subscriptions.add({ targetUri: 'user_1_channel@localhost:' + servers[0].port })
+      await servers[0].subscriptions.add({ targetUri: 'user_1_channel@' + servers[0].host })
+      await servers[1].subscriptions.add({ targetUri: 'user_1_channel@' + servers[0].host })
     })
 
     it('Should send notification to moderators on new video with auto-blacklist', async function () {
@@ -615,8 +615,8 @@ describe('Test moderation notifications', function () {
     after(async () => {
       await servers[0].config.updateCustomConfig({ newCustomConfig: currentCustomConfig })
 
-      await servers[0].subscriptions.remove({ uri: 'user_1_channel@localhost:' + servers[0].port })
-      await servers[1].subscriptions.remove({ uri: 'user_1_channel@localhost:' + servers[0].port })
+      await servers[0].subscriptions.remove({ uri: 'user_1_channel@' + servers[0].host })
+      await servers[1].subscriptions.remove({ uri: 'user_1_channel@' + servers[0].host })
     })
   })
 
diff --git a/server/tests/api/notifications/notifications-api.ts b/server/tests/api/notifications/notifications-api.ts
index f194656c9..1fc861160 100644
--- a/server/tests/api/notifications/notifications-api.ts
+++ b/server/tests/api/notifications/notifications-api.ts
@@ -26,7 +26,7 @@ describe('Test notifications API', function () {
     userNotifications = res.userNotifications
     server = res.servers[0]
 
-    await server.subscriptions.add({ token: userToken, targetUri: 'root_channel@localhost:' + server.port })
+    await server.subscriptions.add({ token: userToken, targetUri: 'root_channel@' + server.host })
 
     for (let i = 0; i < 10; i++) {
       await server.videos.randomUpload({ wait: false })
diff --git a/server/tests/api/notifications/user-notifications.ts b/server/tests/api/notifications/user-notifications.ts
index ceadc21ff..c6087b1eb 100644
--- a/server/tests/api/notifications/user-notifications.ts
+++ b/server/tests/api/notifications/user-notifications.ts
@@ -69,7 +69,7 @@ describe('Test user notifications', function () {
     it('Should send a new video notification if the user follows the local video publisher', async function () {
       this.timeout(15000)
 
-      await servers[0].subscriptions.add({ token: userAccessToken, targetUri: 'root_channel@localhost:' + servers[0].port })
+      await servers[0].subscriptions.add({ token: userAccessToken, targetUri: 'root_channel@' + servers[0].host })
       await waitJobs(servers)
 
       const { name, shortUUID } = await uploadRandomVideoOnServers(servers, 1)
@@ -79,7 +79,7 @@ describe('Test user notifications', function () {
     it('Should send a new video notification from a remote account', async function () {
       this.timeout(150000) // Server 2 has transcoding enabled
 
-      await servers[0].subscriptions.add({ token: userAccessToken, targetUri: 'root_channel@localhost:' + servers[1].port })
+      await servers[0].subscriptions.add({ token: userAccessToken, targetUri: 'root_channel@' + servers[1].host })
       await waitJobs(servers)
 
       const { name, shortUUID } = await uploadRandomVideoOnServers(servers, 2)
@@ -509,7 +509,7 @@ describe('Test user notifications', function () {
     it('Should notify when a local channel is following one of our channel', async function () {
       this.timeout(50000)
 
-      await servers[0].subscriptions.add({ targetUri: 'user_1_channel@localhost:' + servers[0].port })
+      await servers[0].subscriptions.add({ targetUri: 'user_1_channel@' + servers[0].host })
       await waitJobs(servers)
 
       await checkNewActorFollow({
@@ -521,13 +521,13 @@ describe('Test user notifications', function () {
         checkType: 'presence'
       })
 
-      await servers[0].subscriptions.remove({ uri: 'user_1_channel@localhost:' + servers[0].port })
+      await servers[0].subscriptions.remove({ uri: 'user_1_channel@' + servers[0].host })
     })
 
     it('Should notify when a remote channel is following one of our channel', async function () {
       this.timeout(50000)
 
-      await servers[1].subscriptions.add({ targetUri: 'user_1_channel@localhost:' + servers[0].port })
+      await servers[1].subscriptions.add({ targetUri: 'user_1_channel@' + servers[0].host })
       await waitJobs(servers)
 
       await checkNewActorFollow({
@@ -539,14 +539,14 @@ describe('Test user notifications', function () {
         checkType: 'presence'
       })
 
-      await servers[1].subscriptions.remove({ uri: 'user_1_channel@localhost:' + servers[0].port })
+      await servers[1].subscriptions.remove({ uri: 'user_1_channel@' + servers[0].host })
     })
 
     // PeerTube does not support account -> account follows
     // it('Should notify when a local account is following one of our channel', async function () {
     //   this.timeout(50000)
     //
-    //   await addUserSubscription(servers[0].url, servers[0].accessToken, 'user_1@localhost:' + servers[0].port)
+    //   await addUserSubscription(servers[0].url, servers[0].accessToken, 'user_1@' + servers[0].host)
     //
     //   await waitJobs(servers)
     //
@@ -556,7 +556,7 @@ describe('Test user notifications', function () {
     // it('Should notify when a remote account is following one of our channel', async function () {
     //   this.timeout(50000)
     //
-    //   await addUserSubscription(servers[1].url, servers[1].accessToken, 'user_1@localhost:' + servers[0].port)
+    //   await addUserSubscription(servers[1].url, servers[1].accessToken, 'user_1@' + servers[0].host)
     //
     //   await waitJobs(servers)
     //
diff --git a/server/tests/api/object-storage/videos.ts b/server/tests/api/object-storage/videos.ts
index d1875febb..1b3c389d7 100644
--- a/server/tests/api/object-storage/videos.ts
+++ b/server/tests/api/object-storage/videos.ts
@@ -139,7 +139,7 @@ function runTestSuite (options: {
     this.timeout(120000)
 
     const port = await mockObjectStorage.initialize()
-    baseMockUrl = options.useMockBaseUrl ? `http://localhost:${port}` : undefined
+    baseMockUrl = options.useMockBaseUrl ? `http://127.0.0.1:${port}` : undefined
 
     await ObjectStorageCommand.createMockBucket(options.playlistBucket)
     await ObjectStorageCommand.createMockBucket(options.webtorrentBucket)
diff --git a/server/tests/api/redundancy/redundancy.ts b/server/tests/api/redundancy/redundancy.ts
index fb2e6e91c..57939775e 100644
--- a/server/tests/api/redundancy/redundancy.ts
+++ b/server/tests/api/redundancy/redundancy.ts
@@ -265,8 +265,8 @@ async function checkStatsWithoutRedundancy (strategy: VideoRedundancyStrategyWit
 async function findServerFollows () {
   const body = await servers[0].follows.getFollowings({ start: 0, count: 5, sort: '-createdAt' })
   const follows = body.data
-  const server2 = follows.find(f => f.following.host === `localhost:${servers[1].port}`)
-  const server3 = follows.find(f => f.following.host === `localhost:${servers[2].port}`)
+  const server2 = follows.find(f => f.following.host === `${servers[1].host}`)
+  const server3 = follows.find(f => f.following.host === `${servers[2].host}`)
 
   return { server2, server3 }
 }
@@ -639,12 +639,12 @@ describe('Test videos redundancy', function () {
       await wait(10000)
 
       try {
-        await checkContains(servers, 'http%3A%2F%2Flocalhost%3A' + servers[0].port)
+        await checkContains(servers, 'http%3A%2F%2F' + servers[0].hostname + '%3A' + servers[0].port)
       } catch {
         // Maybe a server deleted a redundancy in the scheduler
         await wait(2000)
 
-        await checkContains(servers, 'http%3A%2F%2Flocalhost%3A' + servers[0].port)
+        await checkContains(servers, 'http%3A%2F%2F' + servers[0].hostname + '%3A' + servers[0].port)
       }
     })
 
@@ -655,7 +655,7 @@ describe('Test videos redundancy', function () {
 
       await wait(15000)
 
-      await checkNotContains([ servers[1], servers[2] ], 'http%3A%2F%2Flocalhost%3A' + servers[0].port)
+      await checkNotContains([ servers[1], servers[2] ], 'http%3A%2F%2F' + servers[0].port + '%3A' + servers[0].port)
     })
 
     after(async function () {
diff --git a/server/tests/api/search/search-activitypub-video-channels.ts b/server/tests/api/search/search-activitypub-video-channels.ts
index 8173c8b60..003bd34d0 100644
--- a/server/tests/api/search/search-activitypub-video-channels.ts
+++ b/server/tests/api/search/search-activitypub-video-channels.ts
@@ -87,7 +87,7 @@ describe('Test ActivityPub video channels search', function () {
   it('Should search a local video channel', async function () {
     const searches = [
       servers[0].url + '/video-channels/channel1_server1',
-      'channel1_server1@localhost:' + servers[0].port
+      'channel1_server1@' + servers[0].host
     ]
 
     for (const search of searches) {
@@ -139,7 +139,7 @@ describe('Test ActivityPub video channels search', function () {
       servers[1].url + '/video-channels/channel1_server2',
       servers[1].url + '/c/channel1_server2',
       servers[1].url + '/c/channel1_server2/videos',
-      'channel1_server2@localhost:' + servers[1].port
+      'channel1_server2@' + servers[1].host
     ]
 
     for (const search of searches) {
@@ -169,7 +169,7 @@ describe('Test ActivityPub video channels search', function () {
 
     const { total, data } = await servers[0].videos.listByChannel({
       token: null,
-      handle: 'channel1_server2@localhost:' + servers[1].port
+      handle: 'channel1_server2@' + servers[1].host
     })
     expect(total).to.equal(0)
     expect(data).to.have.lengthOf(0)
@@ -177,7 +177,7 @@ describe('Test ActivityPub video channels search', function () {
 
   it('Should list video channel videos of server 2 with token', async function () {
     const { total, data } = await servers[0].videos.listByChannel({
-      handle: 'channel1_server2@localhost:' + servers[1].port
+      handle: 'channel1_server2@' + servers[1].host
     })
 
     expect(total).to.equal(1)
@@ -226,7 +226,7 @@ describe('Test ActivityPub video channels search', function () {
 
     await waitJobs(servers)
 
-    const handle = 'channel1_server2@localhost:' + servers[1].port
+    const handle = 'channel1_server2@' + servers[1].host
     const { total, data } = await servers[0].videos.listByChannel({ handle, sort: '-createdAt' })
 
     expect(total).to.equal(2)
diff --git a/server/tests/api/search/search-index.ts b/server/tests/api/search/search-index.ts
index eae4391ec..c8be762d2 100644
--- a/server/tests/api/search/search-index.ts
+++ b/server/tests/api/search/search-index.ts
@@ -57,7 +57,7 @@ describe('Test index search', function () {
 
       expect(body.total).to.equal(1)
       expect(body.data[0].name).to.equal('root_channel')
-      expect(body.data[0].host).to.equal('localhost:' + server.port)
+      expect(body.data[0].host).to.equal(server.host)
     })
 
     it('Should make an index videos search by default', async function () {
diff --git a/server/tests/api/server/auto-follows.ts b/server/tests/api/server/auto-follows.ts
index cdaadb3ad..99d5c3142 100644
--- a/server/tests/api/server/auto-follows.ts
+++ b/server/tests/api/server/auto-follows.ts
@@ -150,7 +150,7 @@ describe('Test auto follows', function () {
         followings: {
           instance: {
             autoFollowIndex: {
-              indexUrl: `http://localhost:${port}/api/v1/instances/hosts`,
+              indexUrl: `http://127.0.0.1:${port}/api/v1/instances/hosts`,
               enabled: true
             }
           }
diff --git a/server/tests/api/server/bulk.ts b/server/tests/api/server/bulk.ts
index 7c8b40cbe..1fe26bb26 100644
--- a/server/tests/api/server/bulk.ts
+++ b/server/tests/api/server/bulk.ts
@@ -77,7 +77,7 @@ describe('Test bulk actions', function () {
           const { data } = await servers[1].comments.listThreads({ videoId: video.id })
           const comment = data.find(c => c.text === 'comment by user 3')
 
-          if (video.account.host === 'localhost:' + servers[0].port) {
+          if (video.account.host === servers[0].host) {
             expect(comment).to.not.exist
           } else {
             expect(comment).to.exist
@@ -151,7 +151,7 @@ describe('Test bulk actions', function () {
 
       await bulkCommand.removeCommentsOf({
         attributes: {
-          accountName: 'user3@localhost:' + servers[1].port,
+          accountName: 'user3@' + servers[1].host,
           scope: 'instance'
         }
       })
diff --git a/server/tests/api/server/contact-form.ts b/server/tests/api/server/contact-form.ts
index fcd7f3c4c..325218008 100644
--- a/server/tests/api/server/contact-form.ts
+++ b/server/tests/api/server/contact-form.ts
@@ -25,7 +25,7 @@ describe('Test contact form', function () {
 
     const overrideConfig = {
       smtp: {
-        hostname: 'localhost',
+        hostname: '127.0.0.1',
         port
       }
     }
@@ -51,7 +51,7 @@ describe('Test contact form', function () {
 
     const email = emails[0]
 
-    expect(email['from'][0]['address']).equal('test-admin@localhost')
+    expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
     expect(email['replyTo'][0]['address']).equal('toto@example.com')
     expect(email['to'][0]['address']).equal('admin' + server.internalServerNumber + '@example.com')
     expect(email['subject']).contains('my subject')
diff --git a/server/tests/api/server/email.ts b/server/tests/api/server/email.ts
index 1826c268a..4ab5463fe 100644
--- a/server/tests/api/server/email.ts
+++ b/server/tests/api/server/email.ts
@@ -33,7 +33,7 @@ describe('Test emails', function () {
 
     const overrideConfig = {
       smtp: {
-        hostname: 'localhost',
+        hostname: '127.0.0.1',
         port: emailPort
       }
     }
@@ -66,8 +66,6 @@ describe('Test emails', function () {
   describe('When resetting user password', function () {
 
     it('Should ask to reset the password', async function () {
-      this.timeout(10000)
-
       await server.users.askResetPassword({ email: 'user_1@example.com' })
 
       await waitJobs(server)
@@ -76,7 +74,7 @@ describe('Test emails', function () {
       const email = emails[0]
 
       expect(email['from'][0]['name']).equal('PeerTube')
-      expect(email['from'][0]['address']).equal('test-admin@localhost')
+      expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
       expect(email['to'][0]['address']).equal('user_1@example.com')
       expect(email['subject']).contains('password')
 
@@ -135,7 +133,7 @@ describe('Test emails', function () {
       const email = emails[1]
 
       expect(email['from'][0]['name']).equal('PeerTube')
-      expect(email['from'][0]['address']).equal('test-admin@localhost')
+      expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
       expect(email['to'][0]['address']).equal('create_password@example.com')
       expect(email['subject']).contains('account')
       expect(email['subject']).contains('password')
@@ -191,7 +189,7 @@ describe('Test emails', function () {
       const email = emails[2]
 
       expect(email['from'][0]['name']).equal('PeerTube')
-      expect(email['from'][0]['address']).equal('test-admin@localhost')
+      expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
       expect(email['to'][0]['address']).equal('admin' + server.internalServerNumber + '@example.com')
       expect(email['subject']).contains('abuse')
       expect(email['text']).contains(videoShortUUID)
@@ -212,7 +210,7 @@ describe('Test emails', function () {
       const email = emails[3]
 
       expect(email['from'][0]['name']).equal('PeerTube')
-      expect(email['from'][0]['address']).equal('test-admin@localhost')
+      expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
       expect(email['to'][0]['address']).equal('user_1@example.com')
       expect(email['subject']).contains(' blocked')
       expect(email['text']).contains(' blocked')
@@ -230,7 +228,7 @@ describe('Test emails', function () {
       const email = emails[4]
 
       expect(email['from'][0]['name']).equal('PeerTube')
-      expect(email['from'][0]['address']).equal('test-admin@localhost')
+      expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
       expect(email['to'][0]['address']).equal('user_1@example.com')
       expect(email['subject']).contains(' unblocked')
       expect(email['text']).contains(' unblocked')
@@ -250,7 +248,7 @@ describe('Test emails', function () {
       const email = emails[5]
 
       expect(email['from'][0]['name']).equal('PeerTube')
-      expect(email['from'][0]['address']).equal('test-admin@localhost')
+      expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
       expect(email['to'][0]['address']).equal('user_1@example.com')
       expect(email['subject']).contains(' blacklisted')
       expect(email['text']).contains('my super user video')
@@ -268,7 +266,7 @@ describe('Test emails', function () {
       const email = emails[6]
 
       expect(email['from'][0]['name']).equal('PeerTube')
-      expect(email['from'][0]['address']).equal('test-admin@localhost')
+      expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
       expect(email['to'][0]['address']).equal('user_1@example.com')
       expect(email['subject']).contains(' unblacklisted')
       expect(email['text']).contains('my super user video')
@@ -293,7 +291,7 @@ describe('Test emails', function () {
       const email = emails[7]
 
       expect(email['from'][0]['name']).equal('PeerTube')
-      expect(email['from'][0]['address']).equal('test-admin@localhost')
+      expect(email['from'][0]['address']).equal('test-admin@127.0.0.1')
       expect(email['to'][0]['address']).equal('user_1@example.com')
       expect(email['subject']).contains('Verify')
 
diff --git a/server/tests/api/server/follow-constraints.ts b/server/tests/api/server/follow-constraints.ts
index e1ec2b069..ff5332858 100644
--- a/server/tests/api/server/follow-constraints.ts
+++ b/server/tests/api/server/follow-constraints.ts
@@ -57,21 +57,21 @@ describe('Test follow constraints', function () {
       })
 
       it('Should list local account videos', async function () {
-        const { total, data } = await servers[0].videos.listByAccount({ handle: 'root@localhost:' + servers[0].port })
+        const { total, data } = await servers[0].videos.listByAccount({ handle: 'root@' + servers[0].host })
 
         expect(total).to.equal(1)
         expect(data).to.have.lengthOf(1)
       })
 
       it('Should list remote account videos', async function () {
-        const { total, data } = await servers[0].videos.listByAccount({ handle: 'root@localhost:' + servers[1].port })
+        const { total, data } = await servers[0].videos.listByAccount({ handle: 'root@' + servers[1].host })
 
         expect(total).to.equal(1)
         expect(data).to.have.lengthOf(1)
       })
 
       it('Should list local channel videos', async function () {
-        const handle = 'root_channel@localhost:' + servers[0].port
+        const handle = 'root_channel@' + servers[0].host
         const { total, data } = await servers[0].videos.listByChannel({ handle })
 
         expect(total).to.equal(1)
@@ -79,7 +79,7 @@ describe('Test follow constraints', function () {
       })
 
       it('Should list remote channel videos', async function () {
-        const handle = 'root_channel@localhost:' + servers[1].port
+        const handle = 'root_channel@' + servers[1].host
         const { total, data } = await servers[0].videos.listByChannel({ handle })
 
         expect(total).to.equal(1)
@@ -97,21 +97,21 @@ describe('Test follow constraints', function () {
       })
 
       it('Should list local account videos', async function () {
-        const { total, data } = await servers[0].videos.listByAccount({ token: userToken, handle: 'root@localhost:' + servers[0].port })
+        const { total, data } = await servers[0].videos.listByAccount({ token: userToken, handle: 'root@' + servers[0].host })
 
         expect(total).to.equal(1)
         expect(data).to.have.lengthOf(1)
       })
 
       it('Should list remote account videos', async function () {
-        const { total, data } = await servers[0].videos.listByAccount({ token: userToken, handle: 'root@localhost:' + servers[1].port })
+        const { total, data } = await servers[0].videos.listByAccount({ token: userToken, handle: 'root@' + servers[1].host })
 
         expect(total).to.equal(1)
         expect(data).to.have.lengthOf(1)
       })
 
       it('Should list local channel videos', async function () {
-        const handle = 'root_channel@localhost:' + servers[0].port
+        const handle = 'root_channel@' + servers[0].host
         const { total, data } = await servers[0].videos.listByChannel({ token: userToken, handle })
 
         expect(total).to.equal(1)
@@ -119,7 +119,7 @@ describe('Test follow constraints', function () {
       })
 
       it('Should list remote channel videos', async function () {
-        const handle = 'root_channel@localhost:' + servers[1].port
+        const handle = 'root_channel@' + servers[1].host
         const { total, data } = await servers[0].videos.listByChannel({ token: userToken, handle })
 
         expect(total).to.equal(1)
@@ -161,7 +161,7 @@ describe('Test follow constraints', function () {
       it('Should list local account videos', async function () {
         const { total, data } = await servers[0].videos.listByAccount({
           token: null,
-          handle: 'root@localhost:' + servers[0].port
+          handle: 'root@' + servers[0].host
         })
 
         expect(total).to.equal(1)
@@ -171,7 +171,7 @@ describe('Test follow constraints', function () {
       it('Should not list remote account videos', async function () {
         const { total, data } = await servers[0].videos.listByAccount({
           token: null,
-          handle: 'root@localhost:' + servers[1].port
+          handle: 'root@' + servers[1].host
         })
 
         expect(total).to.equal(0)
@@ -179,7 +179,7 @@ describe('Test follow constraints', function () {
       })
 
       it('Should list local channel videos', async function () {
-        const handle = 'root_channel@localhost:' + servers[0].port
+        const handle = 'root_channel@' + servers[0].host
         const { total, data } = await servers[0].videos.listByChannel({ token: null, handle })
 
         expect(total).to.equal(1)
@@ -187,7 +187,7 @@ describe('Test follow constraints', function () {
       })
 
       it('Should not list remote channel videos', async function () {
-        const handle = 'root_channel@localhost:' + servers[1].port
+        const handle = 'root_channel@' + servers[1].host
         const { total, data } = await servers[0].videos.listByChannel({ token: null, handle })
 
         expect(total).to.equal(0)
@@ -206,21 +206,21 @@ describe('Test follow constraints', function () {
       })
 
       it('Should list local account videos', async function () {
-        const { total, data } = await servers[0].videos.listByAccount({ token: userToken, handle: 'root@localhost:' + servers[0].port })
+        const { total, data } = await servers[0].videos.listByAccount({ token: userToken, handle: 'root@' + servers[0].host })
 
         expect(total).to.equal(1)
         expect(data).to.have.lengthOf(1)
       })
 
       it('Should list remote account videos', async function () {
-        const { total, data } = await servers[0].videos.listByAccount({ token: userToken, handle: 'root@localhost:' + servers[1].port })
+        const { total, data } = await servers[0].videos.listByAccount({ token: userToken, handle: 'root@' + servers[1].host })
 
         expect(total).to.equal(1)
         expect(data).to.have.lengthOf(1)
       })
 
       it('Should list local channel videos', async function () {
-        const handle = 'root_channel@localhost:' + servers[0].port
+        const handle = 'root_channel@' + servers[0].host
         const { total, data } = await servers[0].videos.listByChannel({ token: userToken, handle })
 
         expect(total).to.equal(1)
@@ -228,7 +228,7 @@ describe('Test follow constraints', function () {
       })
 
       it('Should list remote channel videos', async function () {
-        const handle = 'root_channel@localhost:' + servers[1].port
+        const handle = 'root_channel@' + servers[1].host
         const { total, data } = await servers[0].videos.listByChannel({ token: userToken, handle })
 
         expect(total).to.equal(1)
diff --git a/server/tests/api/server/follows.ts b/server/tests/api/server/follows.ts
index 96d39352b..6a2cc2c43 100644
--- a/server/tests/api/server/follows.ts
+++ b/server/tests/api/server/follows.ts
@@ -88,7 +88,7 @@ describe('Test follows', function () {
       const follows = body.data
       expect(follows).to.be.an('array')
       expect(follows).to.have.lengthOf(1)
-      expect(follows[0].follower.host).to.equal('localhost:' + servers[0].port)
+      expect(follows[0].follower.host).to.equal(servers[0].host)
     })
 
     it('Should have 0 followers on server 1 and 2', async function () {
diff --git a/server/tests/api/server/handle-down.ts b/server/tests/api/server/handle-down.ts
index 9ace65ddf..1fb4d18f9 100644
--- a/server/tests/api/server/handle-down.ts
+++ b/server/tests/api/server/handle-down.ts
@@ -62,7 +62,7 @@ describe('Test handle downs', function () {
       support: 'my super support text for server 1',
       account: {
         name: 'root',
-        host: 'localhost:' + servers[0].port
+        host: servers[0].host
       },
       isLocal: false,
       duration: 10,
@@ -151,7 +151,7 @@ describe('Test handle downs', function () {
     const body = await servers[0].follows.getFollowers({ start: 0, count: 2, sort: 'createdAt' })
     expect(body.data).to.be.an('array')
     expect(body.data).to.have.lengthOf(1)
-    expect(body.data[0].follower.host).to.equal('localhost:' + servers[2].port)
+    expect(body.data[0].follower.host).to.equal(servers[2].host)
   })
 
   it('Should not have pending/processing jobs anymore', async function () {
diff --git a/server/tests/api/server/open-telemetry.ts b/server/tests/api/server/open-telemetry.ts
index 7a294be82..db76a3d7f 100644
--- a/server/tests/api/server/open-telemetry.ts
+++ b/server/tests/api/server/open-telemetry.ts
@@ -9,7 +9,7 @@ describe('Open Telemetry', function () {
   let server: PeerTubeServer
 
   describe('Metrics', function () {
-    const metricsUrl = 'http://localhost:9092/metrics'
+    const metricsUrl = 'http://127.0.0.1:9092/metrics'
 
     it('Should not enable open telemetry metrics', async function () {
       this.timeout(60000)
@@ -92,7 +92,7 @@ describe('Open Telemetry', function () {
           tracing: {
             enabled: true,
             jaeger_exporter: {
-              endpoint: 'http://localhost:' + mockPort
+              endpoint: 'http://127.0.0.1:' + mockPort
             }
           }
         }
diff --git a/server/tests/api/server/proxy.ts b/server/tests/api/server/proxy.ts
index 71c444efd..de8872d74 100644
--- a/server/tests/api/server/proxy.ts
+++ b/server/tests/api/server/proxy.ts
@@ -20,7 +20,7 @@ describe('Test proxy', function () {
   let proxy: MockProxy
 
   const goodEnv = { HTTP_PROXY: '' }
-  const badEnv = { HTTP_PROXY: 'http://localhost:9000' }
+  const badEnv = { HTTP_PROXY: 'http://127.0.0.1:9000' }
 
   before(async function () {
     this.timeout(120000)
@@ -30,7 +30,7 @@ describe('Test proxy', function () {
     const proxyPort = await proxy.initialize()
     servers = await createMultipleServers(2)
 
-    goodEnv.HTTP_PROXY = 'http://localhost:' + proxyPort
+    goodEnv.HTTP_PROXY = 'http://127.0.0.1:' + proxyPort
 
     await setAccessTokensToServers(servers)
     await setDefaultVideoChannel(servers)
diff --git a/server/tests/api/users/user-subscriptions.ts b/server/tests/api/users/user-subscriptions.ts
index fbeca7d67..b45cfe67e 100644
--- a/server/tests/api/users/user-subscriptions.ts
+++ b/server/tests/api/users/user-subscriptions.ts
@@ -63,8 +63,8 @@ describe('Test users subscriptions', function () {
     it('User of server 1 should follow user of server 3 and root of server 1', async function () {
       this.timeout(60000)
 
-      await command.add({ token: users[0].accessToken, targetUri: 'user3_channel@localhost:' + servers[2].port })
-      await command.add({ token: users[0].accessToken, targetUri: 'root_channel@localhost:' + servers[0].port })
+      await command.add({ token: users[0].accessToken, targetUri: 'user3_channel@' + servers[2].host })
+      await command.add({ token: users[0].accessToken, targetUri: 'root_channel@' + servers[0].host })
 
       await waitJobs(servers)
 
@@ -112,20 +112,20 @@ describe('Test users subscriptions', function () {
 
     it('Should get subscription', async function () {
       {
-        const videoChannel = await command.get({ token: users[0].accessToken, uri: 'user3_channel@localhost:' + servers[2].port })
+        const videoChannel = await command.get({ token: users[0].accessToken, uri: 'user3_channel@' + servers[2].host })
 
         expect(videoChannel.name).to.equal('user3_channel')
-        expect(videoChannel.host).to.equal('localhost:' + servers[2].port)
+        expect(videoChannel.host).to.equal(servers[2].host)
         expect(videoChannel.displayName).to.equal('Main user3 channel')
         expect(videoChannel.followingCount).to.equal(0)
         expect(videoChannel.followersCount).to.equal(1)
       }
 
       {
-        const videoChannel = await command.get({ token: users[0].accessToken, uri: 'root_channel@localhost:' + servers[0].port })
+        const videoChannel = await command.get({ token: users[0].accessToken, uri: 'root_channel@' + servers[0].host })
 
         expect(videoChannel.name).to.equal('root_channel')
-        expect(videoChannel.host).to.equal('localhost:' + servers[0].port)
+        expect(videoChannel.host).to.equal(servers[0].host)
         expect(videoChannel.displayName).to.equal('Main root channel')
         expect(videoChannel.followingCount).to.equal(0)
         expect(videoChannel.followersCount).to.equal(1)
@@ -134,18 +134,18 @@ describe('Test users subscriptions', function () {
 
     it('Should return the existing subscriptions', async function () {
       const uris = [
-        'user3_channel@localhost:' + servers[2].port,
-        'root2_channel@localhost:' + servers[0].port,
-        'root_channel@localhost:' + servers[0].port,
-        'user3_channel@localhost:' + servers[0].port
+        'user3_channel@' + servers[2].host,
+        'root2_channel@' + servers[0].host,
+        'root_channel@' + servers[0].host,
+        'user3_channel@' + servers[0].host
       ]
 
       const body = await command.exist({ token: users[0].accessToken, uris })
 
-      expect(body['user3_channel@localhost:' + servers[2].port]).to.be.true
-      expect(body['root2_channel@localhost:' + servers[0].port]).to.be.false
-      expect(body['root_channel@localhost:' + servers[0].port]).to.be.true
-      expect(body['user3_channel@localhost:' + servers[0].port]).to.be.false
+      expect(body['user3_channel@' + servers[2].host]).to.be.true
+      expect(body['root2_channel@' + servers[0].host]).to.be.false
+      expect(body['root_channel@' + servers[0].host]).to.be.true
+      expect(body['user3_channel@' + servers[0].host]).to.be.false
     })
 
     it('Should search among subscriptions', async function () {
@@ -305,7 +305,7 @@ describe('Test users subscriptions', function () {
     it('Should remove user of server 3 subscription', async function () {
       this.timeout(30000)
 
-      await command.remove({ token: users[0].accessToken, uri: 'user3_channel@localhost:' + servers[2].port })
+      await command.remove({ token: users[0].accessToken, uri: 'user3_channel@' + servers[2].host })
 
       await waitJobs(servers)
     })
@@ -324,7 +324,7 @@ describe('Test users subscriptions', function () {
     it('Should remove the root subscription and not display the videos anymore', async function () {
       this.timeout(30000)
 
-      await command.remove({ token: users[0].accessToken, uri: 'root_channel@localhost:' + servers[0].port })
+      await command.remove({ token: users[0].accessToken, uri: 'root_channel@' + servers[0].host })
 
       await waitJobs(servers)
 
@@ -355,7 +355,7 @@ describe('Test users subscriptions', function () {
     it('Should follow user of server 3 again', async function () {
       this.timeout(60000)
 
-      await command.add({ token: users[0].accessToken, targetUri: 'user3_channel@localhost:' + servers[2].port })
+      await command.add({ token: users[0].accessToken, targetUri: 'user3_channel@' + servers[2].host })
 
       await waitJobs(servers)
 
@@ -389,8 +389,8 @@ describe('Test users subscriptions', function () {
 
       await servers[2].channels.create({ token: users[2].accessToken, attributes: { name: 'user3_channel2' } })
 
-      await servers[2].subscriptions.add({ token: servers[2].accessToken, targetUri: 'user3_channel@localhost:' + servers[2].port })
-      await servers[2].subscriptions.add({ token: servers[2].accessToken, targetUri: 'user3_channel2@localhost:' + servers[2].port })
+      await servers[2].subscriptions.add({ token: servers[2].accessToken, targetUri: 'user3_channel@' + servers[2].host })
+      await servers[2].subscriptions.add({ token: servers[2].accessToken, targetUri: 'user3_channel2@' + servers[2].host })
 
       await waitJobs(servers)
     })
diff --git a/server/tests/api/users/users-multiple-servers.ts b/server/tests/api/users/users-multiple-servers.ts
index 188e6f137..f94191b04 100644
--- a/server/tests/api/users/users-multiple-servers.ts
+++ b/server/tests/api/users/users-multiple-servers.ts
@@ -111,7 +111,7 @@ describe('Test users with multiple servers', function () {
     for (const server of servers) {
       const body = await server.accounts.list({ sort: '-createdAt' })
 
-      const resList = body.data.find(a => a.name === 'root' && a.host === 'localhost:' + servers[0].port)
+      const resList = body.data.find(a => a.name === 'root' && a.host === servers[0].host)
       expect(resList).not.to.be.undefined
 
       const account = await server.accounts.get({ accountName: resList.name + '@' + resList.host })
@@ -119,7 +119,7 @@ describe('Test users with multiple servers', function () {
       if (!createdAt) createdAt = account.createdAt
 
       expect(account.name).to.equal('root')
-      expect(account.host).to.equal('localhost:' + servers[0].port)
+      expect(account.host).to.equal(servers[0].host)
       expect(account.displayName).to.equal('my super display name')
       expect(account.description).to.equal('my super description updated')
       expect(createdAt).to.equal(account.createdAt)
@@ -138,7 +138,7 @@ describe('Test users with multiple servers', function () {
 
   it('Should list account videos', async function () {
     for (const server of servers) {
-      const { total, data } = await server.videos.listByAccount({ handle: 'user1@localhost:' + servers[0].port })
+      const { total, data } = await server.videos.listByAccount({ handle: 'user1@' + servers[0].host })
 
       expect(total).to.equal(1)
       expect(data).to.be.an('array')
@@ -155,7 +155,7 @@ describe('Test users with multiple servers', function () {
     await waitJobs(servers)
 
     for (const server of servers) {
-      const { total, data } = await server.videos.listByAccount({ handle: 'user1@localhost:' + servers[0].port, search: 'Kami' })
+      const { total, data } = await server.videos.listByAccount({ handle: 'user1@' + servers[0].host, search: 'Kami' })
 
       expect(total).to.equal(1)
       expect(data).to.be.an('array')
@@ -170,11 +170,11 @@ describe('Test users with multiple servers', function () {
     for (const server of servers) {
       const body = await server.accounts.list({ sort: '-createdAt' })
 
-      const accountDeleted = body.data.find(a => a.name === 'user1' && a.host === 'localhost:' + servers[0].port)
+      const accountDeleted = body.data.find(a => a.name === 'user1' && a.host === servers[0].host)
       expect(accountDeleted).not.to.be.undefined
 
       const { data } = await server.channels.list()
-      const videoChannelDeleted = data.find(a => a.displayName === 'Main user1 channel' && a.host === 'localhost:' + servers[0].port)
+      const videoChannelDeleted = data.find(a => a.displayName === 'Main user1 channel' && a.host === servers[0].host)
       expect(videoChannelDeleted).not.to.be.undefined
     }
 
@@ -185,11 +185,11 @@ describe('Test users with multiple servers', function () {
     for (const server of servers) {
       const body = await server.accounts.list({ sort: '-createdAt' })
 
-      const accountDeleted = body.data.find(a => a.name === 'user1' && a.host === 'localhost:' + servers[0].port)
+      const accountDeleted = body.data.find(a => a.name === 'user1' && a.host === servers[0].host)
       expect(accountDeleted).to.be.undefined
 
       const { data } = await server.channels.list()
-      const videoChannelDeleted = data.find(a => a.name === 'Main user1 channel' && a.host === 'localhost:' + servers[0].port)
+      const videoChannelDeleted = data.find(a => a.name === 'Main user1 channel' && a.host === servers[0].host)
       expect(videoChannelDeleted).to.be.undefined
     }
   })
diff --git a/server/tests/api/users/users-verification.ts b/server/tests/api/users/users-verification.ts
index fc082383a..19a8df9e1 100644
--- a/server/tests/api/users/users-verification.ts
+++ b/server/tests/api/users/users-verification.ts
@@ -28,7 +28,7 @@ describe('Test users account verification', function () {
 
     const overrideConfig = {
       smtp: {
-        hostname: 'localhost',
+        hostname: '127.0.0.1',
         port
       }
     }
diff --git a/server/tests/api/videos/multiple-servers.ts b/server/tests/api/videos/multiple-servers.ts
index 2ad749fd4..ff730287a 100644
--- a/server/tests/api/videos/multiple-servers.ts
+++ b/server/tests/api/videos/multiple-servers.ts
@@ -105,7 +105,7 @@ describe('Test multiple servers', function () {
           originallyPublishedAt: '2019-02-10T13:38:14.449Z',
           account: {
             name: 'root',
-            host: 'localhost:' + servers[0].port
+            host: servers[0].host
           },
           isLocal,
           publishedAt,
@@ -185,7 +185,7 @@ describe('Test multiple servers', function () {
 
       // All servers should have this video
       for (const server of servers) {
-        const isLocal = server.url === 'http://localhost:' + servers[1].port
+        const isLocal = server.url === servers[1].url
         const checkAttributes = {
           name: 'my super name for server 2',
           category: 4,
@@ -196,7 +196,7 @@ describe('Test multiple servers', function () {
           support: 'my super support text for server 2',
           account: {
             name: 'user1',
-            host: 'localhost:' + servers[1].port
+            host: servers[1].host
           },
           isLocal,
           commentsEnabled: true,
@@ -279,7 +279,7 @@ describe('Test multiple servers', function () {
 
       // All servers should have this video
       for (const server of servers) {
-        const isLocal = server.url === 'http://localhost:' + servers[2].port
+        const isLocal = server.url === servers[2].url
         const { data } = await server.videos.list()
 
         expect(data).to.be.an('array')
@@ -306,7 +306,7 @@ describe('Test multiple servers', function () {
           support: 'my super support text for server 3',
           account: {
             name: 'root',
-            host: 'localhost:' + servers[2].port
+            host: servers[2].host
           },
           isLocal,
           duration: 5,
@@ -340,7 +340,7 @@ describe('Test multiple servers', function () {
           support: 'my super support text for server 3-2',
           account: {
             name: 'root',
-            host: 'localhost:' + servers[2].port
+            host: servers[2].host
           },
           commentsEnabled: true,
           downloadEnabled: true,
@@ -649,7 +649,7 @@ describe('Test multiple servers', function () {
 
         expect(new Date(videoUpdated.updatedAt)).to.be.greaterThan(updatedAtMin)
 
-        const isLocal = server.url === 'http://localhost:' + servers[2].port
+        const isLocal = server.url === servers[2].url
         const checkAttributes = {
           name: 'my super video updated',
           category: 10,
@@ -661,7 +661,7 @@ describe('Test multiple servers', function () {
           originallyPublishedAt: '2019-02-11T13:38:14.449Z',
           account: {
             name: 'root',
-            host: 'localhost:' + servers[2].port
+            host: servers[2].host
           },
           isLocal,
           duration: 5,
@@ -830,7 +830,7 @@ describe('Test multiple servers', function () {
           expect(comment).to.not.be.undefined
           expect(comment.inReplyToCommentId).to.be.null
           expect(comment.account.name).to.equal('root')
-          expect(comment.account.host).to.equal('localhost:' + servers[0].port)
+          expect(comment.account.host).to.equal(servers[0].host)
           expect(comment.totalReplies).to.equal(3)
           expect(dateIsValid(comment.createdAt as string)).to.be.true
           expect(dateIsValid(comment.updatedAt as string)).to.be.true
@@ -841,7 +841,7 @@ describe('Test multiple servers', function () {
           expect(comment).to.not.be.undefined
           expect(comment.inReplyToCommentId).to.be.null
           expect(comment.account.name).to.equal('root')
-          expect(comment.account.host).to.equal('localhost:' + servers[2].port)
+          expect(comment.account.host).to.equal(servers[2].host)
           expect(comment.totalReplies).to.equal(0)
           expect(dateIsValid(comment.createdAt as string)).to.be.true
           expect(dateIsValid(comment.updatedAt as string)).to.be.true
@@ -858,25 +858,25 @@ describe('Test multiple servers', function () {
 
         expect(tree.comment.text).equal('my super first comment')
         expect(tree.comment.account.name).equal('root')
-        expect(tree.comment.account.host).equal('localhost:' + servers[0].port)
+        expect(tree.comment.account.host).equal(servers[0].host)
         expect(tree.children).to.have.lengthOf(2)
 
         const firstChild = tree.children[0]
         expect(firstChild.comment.text).to.equal('my super answer to thread 1')
         expect(firstChild.comment.account.name).equal('root')
-        expect(firstChild.comment.account.host).equal('localhost:' + servers[1].port)
+        expect(firstChild.comment.account.host).equal(servers[1].host)
         expect(firstChild.children).to.have.lengthOf(1)
 
         childOfFirstChild = firstChild.children[0]
         expect(childOfFirstChild.comment.text).to.equal('my super answer to answer of thread 1')
         expect(childOfFirstChild.comment.account.name).equal('root')
-        expect(childOfFirstChild.comment.account.host).equal('localhost:' + servers[2].port)
+        expect(childOfFirstChild.comment.account.host).equal(servers[2].host)
         expect(childOfFirstChild.children).to.have.lengthOf(0)
 
         const secondChild = tree.children[1]
         expect(secondChild.comment.text).to.equal('my second answer to thread 1')
         expect(secondChild.comment.account.name).equal('root')
-        expect(secondChild.comment.account.host).equal('localhost:' + servers[2].port)
+        expect(secondChild.comment.account.host).equal(servers[2].host)
         expect(secondChild.children).to.have.lengthOf(0)
       }
     })
@@ -935,7 +935,7 @@ describe('Test multiple servers', function () {
           expect(comment).to.not.be.undefined
           expect(comment.inReplyToCommentId).to.be.null
           expect(comment.account.name).to.equal('root')
-          expect(comment.account.host).to.equal('localhost:' + servers[2].port)
+          expect(comment.account.host).to.equal(servers[2].host)
           expect(comment.totalReplies).to.equal(0)
           expect(dateIsValid(comment.createdAt as string)).to.be.true
           expect(dateIsValid(comment.updatedAt as string)).to.be.true
@@ -1042,7 +1042,7 @@ describe('Test multiple servers', function () {
         const { data } = await server.videos.list()
         const video = data.find(v => v.name === 'minimum parameters')
 
-        const isLocal = server.url === 'http://localhost:' + servers[1].port
+        const isLocal = server.url === servers[1].url
         const checkAttributes = {
           name: 'minimum parameters',
           category: null,
@@ -1053,7 +1053,7 @@ describe('Test multiple servers', function () {
           support: null,
           account: {
             name: 'root',
-            host: 'localhost:' + servers[1].port
+            host: servers[1].host
           },
           isLocal,
           duration: 5,
diff --git a/server/tests/api/videos/single-server.ts b/server/tests/api/videos/single-server.ts
index da8bde07b..e8e981e55 100644
--- a/server/tests/api/videos/single-server.ts
+++ b/server/tests/api/videos/single-server.ts
@@ -33,7 +33,7 @@ describe('Test a single server', function () {
       support: 'my super support text',
       account: {
         name: 'root',
-        host: 'localhost:' + server.port
+        host: server.host
       },
       isLocal: true,
       duration: 5,
@@ -66,7 +66,7 @@ describe('Test a single server', function () {
       support: 'my super support text updated',
       account: {
         name: 'root',
-        host: 'localhost:' + server.port
+        host: server.host
       },
       isLocal: true,
       tags: [ 'tagup1', 'tagup2' ],
diff --git a/server/tests/api/videos/video-channels.ts b/server/tests/api/videos/video-channels.ts
index 86a8a038c..64bd4d9ae 100644
--- a/server/tests/api/videos/video-channels.ts
+++ b/server/tests/api/videos/video-channels.ts
@@ -373,7 +373,7 @@ describe('Test video channels', function () {
     this.timeout(10000)
 
     for (const server of servers) {
-      const channelURI = 'second_video_channel@localhost:' + servers[0].port
+      const channelURI = 'second_video_channel@' + servers[0].host
       const { total, data } = await server.videos.listByChannel({ handle: channelURI })
 
       expect(total).to.equal(1)
@@ -396,13 +396,13 @@ describe('Test video channels', function () {
 
     for (const server of servers) {
       {
-        const secondChannelURI = 'second_video_channel@localhost:' + servers[0].port
+        const secondChannelURI = 'second_video_channel@' + servers[0].host
         const { total } = await server.videos.listByChannel({ handle: secondChannelURI })
         expect(total).to.equal(0)
       }
 
       {
-        const channelURI = 'root_channel@localhost:' + servers[0].port
+        const channelURI = 'root_channel@' + servers[0].host
         const { total, data } = await server.videos.listByChannel({ handle: channelURI })
         expect(total).to.equal(1)
 
diff --git a/server/tests/api/videos/video-comments.ts b/server/tests/api/videos/video-comments.ts
index 348b408e8..dc47f8a4a 100644
--- a/server/tests/api/videos/video-comments.ts
+++ b/server/tests/api/videos/video-comments.ts
@@ -63,8 +63,8 @@ describe('Test video comments', function () {
       expect(comment.videoId).to.equal(videoId)
       expect(comment.id).to.equal(comment.threadId)
       expect(comment.account.name).to.equal('root')
-      expect(comment.account.host).to.equal('localhost:' + server.port)
-      expect(comment.account.url).to.equal('http://localhost:' + server.port + '/accounts/root')
+      expect(comment.account.host).to.equal(server.host)
+      expect(comment.account.url).to.equal(server.url + '/accounts/root')
       expect(comment.totalReplies).to.equal(0)
       expect(comment.totalRepliesFromVideoAuthor).to.equal(0)
       expect(dateIsValid(comment.createdAt as string)).to.be.true
@@ -85,7 +85,7 @@ describe('Test video comments', function () {
       expect(comment.videoId).to.equal(videoId)
       expect(comment.id).to.equal(comment.threadId)
       expect(comment.account.name).to.equal('root')
-      expect(comment.account.host).to.equal('localhost:' + server.port)
+      expect(comment.account.host).to.equal(server.host)
 
       for (const avatar of comment.account.avatars) {
         await testImage(server.url, `avatar-resized-${avatar.width}x${avatar.width}`, avatar.path, '.png')
diff --git a/server/tests/api/videos/video-playlists.ts b/server/tests/api/videos/video-playlists.ts
index a3de73ba5..6a18cf26a 100644
--- a/server/tests/api/videos/video-playlists.ts
+++ b/server/tests/api/videos/video-playlists.ts
@@ -404,7 +404,7 @@ describe('Test video playlists', function () {
     it('Should not list unlisted or private playlists', async function () {
       for (const server of servers) {
         const results = [
-          await server.playlists.listByAccount({ handle: 'root@localhost:' + servers[1].port, sort: '-createdAt' }),
+          await server.playlists.listByAccount({ handle: 'root@' + servers[1].host, sort: '-createdAt' }),
           await server.playlists.list({ start: 0, count: 2, sort: '-createdAt' })
         ]
 
@@ -701,52 +701,52 @@ describe('Test video playlists', function () {
       const position = 2
 
       {
-        await command.addToMyBlocklist({ token: userTokenServer1, account: 'root@localhost:' + servers[1].port })
+        await command.addToMyBlocklist({ token: userTokenServer1, account: 'root@' + servers[1].host })
         await waitJobs(servers)
 
         await checkPlaylistElementType(groupUser1, playlistServer1UUID2, VideoPlaylistElementType.UNAVAILABLE, position, name, 3)
         await checkPlaylistElementType(group2, playlistServer1UUID2, VideoPlaylistElementType.REGULAR, position, name, 3)
 
-        await command.removeFromMyBlocklist({ token: userTokenServer1, account: 'root@localhost:' + servers[1].port })
+        await command.removeFromMyBlocklist({ token: userTokenServer1, account: 'root@' + servers[1].host })
         await waitJobs(servers)
 
         await checkPlaylistElementType(group2, playlistServer1UUID2, VideoPlaylistElementType.REGULAR, position, name, 3)
       }
 
       {
-        await command.addToMyBlocklist({ token: userTokenServer1, server: 'localhost:' + servers[1].port })
+        await command.addToMyBlocklist({ token: userTokenServer1, server: servers[1].host })
         await waitJobs(servers)
 
         await checkPlaylistElementType(groupUser1, playlistServer1UUID2, VideoPlaylistElementType.UNAVAILABLE, position, name, 3)
         await checkPlaylistElementType(group2, playlistServer1UUID2, VideoPlaylistElementType.REGULAR, position, name, 3)
 
-        await command.removeFromMyBlocklist({ token: userTokenServer1, server: 'localhost:' + servers[1].port })
+        await command.removeFromMyBlocklist({ token: userTokenServer1, server: servers[1].host })
         await waitJobs(servers)
 
         await checkPlaylistElementType(group2, playlistServer1UUID2, VideoPlaylistElementType.REGULAR, position, name, 3)
       }
 
       {
-        await command.addToServerBlocklist({ account: 'root@localhost:' + servers[1].port })
+        await command.addToServerBlocklist({ account: 'root@' + servers[1].host })
         await waitJobs(servers)
 
         await checkPlaylistElementType(groupUser1, playlistServer1UUID2, VideoPlaylistElementType.UNAVAILABLE, position, name, 3)
         await checkPlaylistElementType(group2, playlistServer1UUID2, VideoPlaylistElementType.REGULAR, position, name, 3)
 
-        await command.removeFromServerBlocklist({ account: 'root@localhost:' + servers[1].port })
+        await command.removeFromServerBlocklist({ account: 'root@' + servers[1].host })
         await waitJobs(servers)
 
         await checkPlaylistElementType(group2, playlistServer1UUID2, VideoPlaylistElementType.REGULAR, position, name, 3)
       }
 
       {
-        await command.addToServerBlocklist({ server: 'localhost:' + servers[1].port })
+        await command.addToServerBlocklist({ server: servers[1].host })
         await waitJobs(servers)
 
         await checkPlaylistElementType(groupUser1, playlistServer1UUID2, VideoPlaylistElementType.UNAVAILABLE, position, name, 3)
         await checkPlaylistElementType(group2, playlistServer1UUID2, VideoPlaylistElementType.REGULAR, position, name, 3)
 
-        await command.removeFromServerBlocklist({ server: 'localhost:' + servers[1].port })
+        await command.removeFromServerBlocklist({ server: servers[1].host })
         await waitJobs(servers)
 
         await checkPlaylistElementType(group2, playlistServer1UUID2, VideoPlaylistElementType.REGULAR, position, name, 3)
diff --git a/server/tests/cli/peertube.ts b/server/tests/cli/peertube.ts
index a39bcfebe..400d5867c 100644
--- a/server/tests/cli/peertube.ts
+++ b/server/tests/cli/peertube.ts
@@ -300,7 +300,7 @@ describe('Test CLI wrapper', function () {
         const stdout = await cliCommand.execWithEnv(`${cmd} redundancy ${params}`)
 
         expect(stdout).to.contain('super video')
-        expect(stdout).to.contain(`localhost:${server.port}`)
+        expect(stdout).to.contain(server.host)
       }
     })
 
diff --git a/server/tests/cli/prune-storage.ts b/server/tests/cli/prune-storage.ts
index ba0fa1f86..8bdf2136d 100644
--- a/server/tests/cli/prune-storage.ts
+++ b/server/tests/cli/prune-storage.ts
@@ -94,7 +94,7 @@ describe('Test prune storage scripts', function () {
 
     // Lazy load the remote avatars
     {
-      const account = await servers[0].accounts.get({ accountName: 'root@localhost:' + servers[1].port })
+      const account = await servers[0].accounts.get({ accountName: 'root@' + servers[1].host })
 
       for (const avatar of account.avatars) {
         await makeGetRequest({
@@ -106,7 +106,7 @@ describe('Test prune storage scripts', function () {
     }
 
     {
-      const account = await servers[1].accounts.get({ accountName: 'root@localhost:' + servers[0].port })
+      const account = await servers[1].accounts.get({ accountName: 'root@' + servers[0].host })
       for (const avatar of account.avatars) {
         await makeGetRequest({
           url: servers[1].url,
diff --git a/server/tests/cli/update-host.ts b/server/tests/cli/update-host.ts
index 97632450a..51257d3d3 100644
--- a/server/tests/cli/update-host.ts
+++ b/server/tests/cli/update-host.ts
@@ -67,7 +67,7 @@ describe('Test update host scripts', function () {
     for (const video of data) {
       const { body } = await makeActivityPubGetRequest(server.url, '/videos/watch/' + video.uuid)
 
-      expect(body.id).to.equal('http://localhost:9002/videos/watch/' + video.uuid)
+      expect(body.id).to.equal('http://127.0.0.1:9002/videos/watch/' + video.uuid)
 
       const videoDetails = await server.videos.get({ id: video.uuid })
 
@@ -84,7 +84,7 @@ describe('Test update host scripts', function () {
     for (const channel of data) {
       const { body } = await makeActivityPubGetRequest(server.url, '/video-channels/' + channel.name)
 
-      expect(body.id).to.equal('http://localhost:9002/video-channels/' + channel.name)
+      expect(body.id).to.equal('http://127.0.0.1:9002/video-channels/' + channel.name)
     }
   })
 
@@ -96,7 +96,7 @@ describe('Test update host scripts', function () {
       const usernameWithDomain = account.name
       const { body } = await makeActivityPubGetRequest(server.url, '/accounts/' + usernameWithDomain)
 
-      expect(body.id).to.equal('http://localhost:9002/accounts/' + usernameWithDomain)
+      expect(body.id).to.equal('http://127.0.0.1:9002/accounts/' + usernameWithDomain)
     }
   })
 
@@ -113,17 +113,17 @@ describe('Test update host scripts', function () {
       expect(files).to.have.lengthOf(8)
 
       for (const file of files) {
-        expect(file.magnetUri).to.contain('localhost%3A9002%2Ftracker%2Fsocket')
-        expect(file.magnetUri).to.contain('localhost%3A9002%2Fstatic%2F')
+        expect(file.magnetUri).to.contain('127.0.0.1%3A9002%2Ftracker%2Fsocket')
+        expect(file.magnetUri).to.contain('127.0.0.1%3A9002%2Fstatic%2F')
 
         const torrent = await parseTorrentVideo(server, file)
-        const announceWS = torrent.announce.find(a => a === 'ws://localhost:9002/tracker/socket')
+        const announceWS = torrent.announce.find(a => a === 'ws://127.0.0.1:9002/tracker/socket')
         expect(announceWS).to.not.be.undefined
 
-        const announceHttp = torrent.announce.find(a => a === 'http://localhost:9002/tracker/announce')
+        const announceHttp = torrent.announce.find(a => a === 'http://127.0.0.1:9002/tracker/announce')
         expect(announceHttp).to.not.be.undefined
 
-        expect(torrent.urlList[0]).to.contain('http://localhost:9002/static/')
+        expect(torrent.urlList[0]).to.contain('http://127.0.0.1:9002/static/')
       }
     }
   })
diff --git a/server/tests/client.ts b/server/tests/client.ts
index 39ba5fdf6..e0dae2b5e 100644
--- a/server/tests/client.ts
+++ b/server/tests/client.ts
@@ -134,11 +134,9 @@ describe('Test a client controllers', function () {
             expectedStatus: HttpStatusCode.OK_200
           })
 
-          const port = servers[0].port
-
-          const expectedLink = '<link rel="alternate" type="application/json+oembed" href="http://localhost:' + port + '/services/oembed?' +
-            `url=http%3A%2F%2Flocalhost%3A${port}%2Fw%2F${servers[0].store.video.shortUUID}" ` +
-            `title="${servers[0].store.video.name}" />`
+          const expectedLink = `<link rel="alternate" type="application/json+oembed" href="${servers[0].url}/services/oembed?` +
+          `url=http%3A%2F%2F${servers[0].hostname}%3A${servers[0].port}%2Fw%2F${servers[0].store.video.shortUUID}" ` +
+          `title="${servers[0].store.video.name}" />`
 
           expect(res.text).to.contain(expectedLink)
         }
@@ -155,10 +153,8 @@ describe('Test a client controllers', function () {
             expectedStatus: HttpStatusCode.OK_200
           })
 
-          const port = servers[0].port
-
-          const expectedLink = '<link rel="alternate" type="application/json+oembed" href="http://localhost:' + port + '/services/oembed?' +
-            `url=http%3A%2F%2Flocalhost%3A${port}%2Fw%2Fp%2F${playlist.shortUUID}" ` +
+          const expectedLink = `<link rel="alternate" type="application/json+oembed" href="${servers[0].url}/services/oembed?` +
+            `url=http%3A%2F%2F${servers[0].hostname}%3A${servers[0].port}%2Fw%2Fp%2F${playlist.shortUUID}" ` +
             `title="${playlistName}" />`
 
           expect(res.text).to.contain(expectedLink)
diff --git a/server/tests/external-plugins/auth-ldap.ts b/server/tests/external-plugins/auth-ldap.ts
index 6f6a574a0..d51d337be 100644
--- a/server/tests/external-plugins/auth-ldap.ts
+++ b/server/tests/external-plugins/auth-ldap.ts
@@ -32,7 +32,7 @@ describe('Official plugin auth-ldap', function () {
         'mail-property': 'mail',
         'search-base': 'ou=people,dc=planetexpress,dc=com',
         'search-filter': '(|(mail={{username}})(uid={{username}}))',
-        'url': 'ldap://localhost:390',
+        'url': 'ldap://127.0.0.1:390',
         'username-property': 'uid'
       }
     })
@@ -50,7 +50,7 @@ describe('Official plugin auth-ldap', function () {
         'mail-property': 'mail',
         'search-base': 'ou=people,dc=planetexpress,dc=com',
         'search-filter': '(|(mail={{username}})(uid={{username}}))',
-        'url': 'ldap://localhost:10389',
+        'url': 'ldap://127.0.0.1:10389',
         'username-property': 'uid'
       }
     })
diff --git a/server/tests/external-plugins/auto-block-videos.ts b/server/tests/external-plugins/auto-block-videos.ts
index 7df0b3390..d14587c38 100644
--- a/server/tests/external-plugins/auto-block-videos.ts
+++ b/server/tests/external-plugins/auto-block-videos.ts
@@ -64,7 +64,7 @@ describe('Official plugin auto-block videos', function () {
     await servers[0].plugins.updateSettings({
       npmName: 'peertube-plugin-auto-block-videos',
       settings: {
-        'blocklist-urls': `http://localhost:${port}/blocklist`,
+        'blocklist-urls': `http://127.0.0.1:${port}/blocklist`,
         'check-seconds-interval': 1
       }
     })
diff --git a/server/tests/external-plugins/auto-mute.ts b/server/tests/external-plugins/auto-mute.ts
index b4578cd90..440b58bfd 100644
--- a/server/tests/external-plugins/auto-mute.ts
+++ b/server/tests/external-plugins/auto-mute.ts
@@ -43,7 +43,7 @@ describe('Official plugin auto-mute', function () {
     await servers[0].plugins.updateSettings({
       npmName: 'peertube-plugin-auto-mute',
       settings: {
-        'blocklist-urls': `http://localhost:${port}/blocklist`,
+        'blocklist-urls': `http://127.0.0.1:${port}/blocklist`,
         'check-seconds-interval': 1
       }
     })
@@ -55,7 +55,7 @@ describe('Official plugin auto-mute', function () {
     blocklistServer.replace({
       data: [
         {
-          value: 'localhost:' + servers[1].port
+          value: servers[1].host
         }
       ]
     })
@@ -72,7 +72,7 @@ describe('Official plugin auto-mute', function () {
     blocklistServer.replace({
       data: [
         {
-          value: 'localhost:' + servers[1].port,
+          value: servers[1].host,
           action: 'remove'
         }
       ]
@@ -90,7 +90,7 @@ describe('Official plugin auto-mute', function () {
     blocklistServer.replace({
       data: [
         {
-          value: 'root@localhost:' + servers[1].port
+          value: 'root@' + servers[1].host
         }
       ]
     })
@@ -107,7 +107,7 @@ describe('Official plugin auto-mute', function () {
     blocklistServer.replace({
       data: [
         {
-          value: 'root@localhost:' + servers[1].port,
+          value: 'root@' + servers[1].host,
           action: 'remove'
         }
       ]
@@ -122,7 +122,7 @@ describe('Official plugin auto-mute', function () {
   it('Should auto mute an account, manually unmute it and do not remute it automatically', async function () {
     this.timeout(20000)
 
-    const account = 'root@localhost:' + servers[1].port
+    const account = 'root@' + servers[1].host
 
     blocklistServer.replace({
       data: [
@@ -188,14 +188,14 @@ describe('Official plugin auto-mute', function () {
     await servers[1].plugins.updateSettings({
       npmName: 'peertube-plugin-auto-mute',
       settings: {
-        'blocklist-urls': 'http://localhost:' + servers[0].port + autoMuteListPath,
+        'blocklist-urls': 'http://' + servers[0].host + autoMuteListPath,
         'check-seconds-interval': 1,
         'expose-mute-list': false
       }
     })
 
-    await servers[0].blocklist.addToServerBlocklist({ account: 'root@localhost:' + servers[1].port })
-    await servers[0].blocklist.addToMyBlocklist({ server: 'localhost:' + servers[1].port })
+    await servers[0].blocklist.addToServerBlocklist({ account: 'root@' + servers[1].host })
+    await servers[0].blocklist.addToMyBlocklist({ server: servers[1].host })
 
     const res = await makeGetRequest({
       url: servers[0].url,
@@ -206,7 +206,7 @@ describe('Official plugin auto-mute', function () {
     const data = res.body.data
     expect(data).to.have.lengthOf(1)
     expect(data[0].updatedAt).to.exist
-    expect(data[0].value).to.equal('root@localhost:' + servers[1].port)
+    expect(data[0].value).to.equal('root@' + servers[1].host)
 
     await wait(2000)
 
diff --git a/server/tests/fixtures/ap-json/peertube/announce-without-context.json b/server/tests/fixtures/ap-json/peertube/announce-without-context.json
index 5f2af0cde..cda1c514c 100644
--- a/server/tests/fixtures/ap-json/peertube/announce-without-context.json
+++ b/server/tests/fixtures/ap-json/peertube/announce-without-context.json
@@ -1,13 +1,13 @@
 {
   "type": "Announce",
-  "id": "http://localhost:9002/videos/watch/997111d4-e8d8-4f45-99d3-857905785d05/announces/1",
-  "actor": "http://localhost:9002/accounts/peertube",
-  "object": "http://localhost:9002/videos/watch/997111d4-e8d8-4f45-99d3-857905785d05",
+  "id": "http://127.0.0.1:9002/videos/watch/997111d4-e8d8-4f45-99d3-857905785d05/announces/1",
+  "actor": "http://127.0.0.1:9002/accounts/peertube",
+  "object": "http://127.0.0.1:9002/videos/watch/997111d4-e8d8-4f45-99d3-857905785d05",
   "to": [
     "https://www.w3.org/ns/activitystreams#Public",
-    "http://localhost:9002/accounts/peertube/followers",
-    "http://localhost:9002/video-channels/root_channel/followers",
-    "http://localhost:9002/accounts/root/followers"
+    "http://127.0.0.1:9002/accounts/peertube/followers",
+    "http://127.0.0.1:9002/video-channels/root_channel/followers",
+    "http://127.0.0.1:9002/accounts/root/followers"
   ],
   "cc": []
 }
diff --git a/server/tests/helpers/request.ts b/server/tests/helpers/request.ts
index a85d80b88..363237df5 100644
--- a/server/tests/helpers/request.ts
+++ b/server/tests/helpers/request.ts
@@ -41,7 +41,7 @@ describe('Request helpers', function () {
     const port = await mock.initialize()
 
     const before = new Date().getTime()
-    await doRequest('http://localhost:' + port)
+    await doRequest('http://127.0.0.1:' + port)
 
     expect(new Date().getTime() - before).to.be.greaterThan(2000)
 
diff --git a/server/tests/misc-endpoints.ts b/server/tests/misc-endpoints.ts
index d2072342e..f9cf2b717 100644
--- a/server/tests/misc-endpoints.ts
+++ b/server/tests/misc-endpoints.ts
@@ -166,7 +166,7 @@ describe('Test misc endpoints', function () {
       })
 
       expect(res.text).to.contain('xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"')
-      expect(res.text).to.contain('<url><loc>http://localhost:' + server.port + '/about/instance</loc></url>')
+      expect(res.text).to.contain('<url><loc>' + server.url + '/about/instance</loc></url>')
     })
 
     it('Should get the empty cached sitemap', async function () {
@@ -177,7 +177,7 @@ describe('Test misc endpoints', function () {
       })
 
       expect(res.text).to.contain('xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"')
-      expect(res.text).to.contain('<url><loc>http://localhost:' + server.port + '/about/instance</loc></url>')
+      expect(res.text).to.contain('<url><loc>' + server.url + '/about/instance</loc></url>')
     })
 
     it('Should add videos, channel and accounts and get sitemap', async function () {
@@ -200,17 +200,17 @@ describe('Test misc endpoints', function () {
       })
 
       expect(res.text).to.contain('xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"')
-      expect(res.text).to.contain('<url><loc>http://localhost:' + server.port + '/about/instance</loc></url>')
+      expect(res.text).to.contain('<url><loc>' + server.url + '/about/instance</loc></url>')
 
       expect(res.text).to.contain('<video:title>video 1</video:title>')
       expect(res.text).to.contain('<video:title>video 2</video:title>')
       expect(res.text).to.not.contain('<video:title>video 3</video:title>')
 
-      expect(res.text).to.contain('<url><loc>http://localhost:' + server.port + '/video-channels/channel1</loc></url>')
-      expect(res.text).to.contain('<url><loc>http://localhost:' + server.port + '/video-channels/channel2</loc></url>')
+      expect(res.text).to.contain('<url><loc>' + server.url + '/video-channels/channel1</loc></url>')
+      expect(res.text).to.contain('<url><loc>' + server.url + '/video-channels/channel2</loc></url>')
 
-      expect(res.text).to.contain('<url><loc>http://localhost:' + server.port + '/accounts/user1</loc></url>')
-      expect(res.text).to.contain('<url><loc>http://localhost:' + server.port + '/accounts/user2</loc></url>')
+      expect(res.text).to.contain('<url><loc>' + server.url + '/accounts/user1</loc></url>')
+      expect(res.text).to.contain('<url><loc>' + server.url + '/accounts/user2</loc></url>')
     })
 
     it('Should not fail with big title/description videos', async function () {
diff --git a/server/tests/plugins/plugin-helpers.ts b/server/tests/plugins/plugin-helpers.ts
index f2bada4ee..038e3f0d6 100644
--- a/server/tests/plugins/plugin-helpers.ts
+++ b/server/tests/plugins/plugin-helpers.ts
@@ -46,7 +46,7 @@ describe('Test plugin helpers', function () {
   describe('Logger', function () {
 
     it('Should have logged things', async function () {
-      await servers[0].servers.waitUntilLog('localhost:' + servers[0].port + ' peertube-plugin-test-four', 1, false)
+      await servers[0].servers.waitUntilLog(servers[0].host + ' peertube-plugin-test-four', 1, false)
       await servers[0].servers.waitUntilLog('Hello world from plugin four', 1)
     })
   })
@@ -61,7 +61,7 @@ describe('Test plugin helpers', function () {
   describe('Config', function () {
 
     it('Should have the correct webserver url', async function () {
-      await servers[0].servers.waitUntilLog(`server url is http://localhost:${servers[0].port}`)
+      await servers[0].servers.waitUntilLog(`server url is ${servers[0].url}`)
     })
 
     it('Should have the correct config', async function () {
@@ -208,7 +208,7 @@ describe('Test plugin helpers', function () {
 
     it('Should mute server 2', async function () {
       this.timeout(10000)
-      await postCommand(servers[0], 'blockServer', { hostToBlock: `localhost:${servers[1].port}` })
+      await postCommand(servers[0], 'blockServer', { hostToBlock: servers[1].host })
 
       const { data } = await servers[0].videos.list()
 
@@ -217,7 +217,7 @@ describe('Test plugin helpers', function () {
     })
 
     it('Should unmute server 2', async function () {
-      await postCommand(servers[0], 'unblockServer', { hostToUnblock: `localhost:${servers[1].port}` })
+      await postCommand(servers[0], 'unblockServer', { hostToUnblock: servers[1].host })
 
       const { data } = await servers[0].videos.list()
 
@@ -225,7 +225,7 @@ describe('Test plugin helpers', function () {
     })
 
     it('Should mute account of server 2', async function () {
-      await postCommand(servers[0], 'blockAccount', { handleToBlock: `root@localhost:${servers[1].port}` })
+      await postCommand(servers[0], 'blockAccount', { handleToBlock: `root@${servers[1].host}` })
 
       const { data } = await servers[0].videos.list()
 
@@ -234,7 +234,7 @@ describe('Test plugin helpers', function () {
     })
 
     it('Should unmute account of server 2', async function () {
-      await postCommand(servers[0], 'unblockAccount', { handleToUnblock: `root@localhost:${servers[1].port}` })
+      await postCommand(servers[0], 'unblockAccount', { handleToUnblock: `root@${servers[1].host}` })
 
       const { data } = await servers[0].videos.list()
 
diff --git a/server/tests/shared/notifications.ts b/server/tests/shared/notifications.ts
index ee15e2b09..e600bd6b2 100644
--- a/server/tests/shared/notifications.ts
+++ b/server/tests/shared/notifications.ts
@@ -371,7 +371,7 @@ async function checkNewCommentOnMyVideo (options: CheckerBaseParams & {
     }
   }
 
-  const commentUrl = `http://localhost:${server.port}/w/${shortUUID};threadId=${threadId}`
+  const commentUrl = `${server.url}/w/${shortUUID};threadId=${threadId}`
 
   function emailNotificationFinder (email: object) {
     return email['text'].indexOf(commentUrl) !== -1
@@ -674,7 +674,7 @@ async function prepareNotificationsTest (serversCount = 3, overrideConfigArg: an
 
   const overrideConfig = {
     smtp: {
-      hostname: 'localhost',
+      hostname: '127.0.0.1',
       port
     },
     signup: {
diff --git a/shared/server-commands/miscs/sql-command.ts b/shared/server-commands/miscs/sql-command.ts
index f163cc8c9..dbc441aba 100644
--- a/shared/server-commands/miscs/sql-command.ts
+++ b/shared/server-commands/miscs/sql-command.ts
@@ -131,7 +131,7 @@ export class SQLCommand extends AbstractCommand {
     const dbname = 'peertube_test' + this.server.internalServerNumber
     const username = 'peertube'
     const password = 'peertube'
-    const host = 'localhost'
+    const host = '127.0.0.1'
     const port = 5432
 
     this.sequelize = new Sequelize(dbname, username, password, {
diff --git a/shared/server-commands/server/server.ts b/shared/server-commands/server/server.ts
index f2ca51431..ae1395a74 100644
--- a/shared/server-commands/server/server.ts
+++ b/shared/server-commands/server/server.ts
@@ -179,9 +179,9 @@ export class PeerTubeServer {
     this.rtmpsPort = this.parallel ? this.randomRTMP() : 1937
     this.port = 9000 + this.internalServerNumber
 
-    this.url = `http://localhost:${this.port}`
-    this.host = `localhost:${this.port}`
-    this.hostname = 'localhost'
+    this.url = `http://127.0.0.1:${this.port}`
+    this.host = `127.0.0.1:${this.port}`
+    this.hostname = '127.0.0.1'
   }
 
   setUrl (url: string) {
diff --git a/shared/server-commands/videos/live.ts b/shared/server-commands/videos/live.ts
index ee7444b64..578e6ede7 100644
--- a/shared/server-commands/videos/live.ts
+++ b/shared/server-commands/videos/live.ts
@@ -39,6 +39,7 @@ function sendRTMPStream (options: {
 
   if (process.env.DEBUG) {
     command.on('stderr', data => console.log(data))
+    command.on('stdout', data => console.log(data))
   }
 
   command.run()