1 files changed, 3 insertions, 1 deletions

diff --git a/tests/front/controller/admin/ThumbnailsControllerTest.php b/tests/front/controller/admin/ThumbnailsControllerTest.php
index f4a8acff..e5749654 100644
--- a/tests/front/controller/admin/ThumbnailsControllerTest.php
+++ b/tests/front/controller/admin/ThumbnailsControllerTest.php
@@ -89,8 +89,10 @@ class ThumbnailsControllerTest extends TestCase
         $this->container->bookmarkService
             ->expects(static::once())
             ->method('set')
-            ->willReturnCallback(function (Bookmark $bookmark) use ($thumb) {
+            ->willReturnCallback(function (Bookmark $bookmark) use ($thumb): Bookmark {
                 static::assertSame($thumb, $bookmark->getThumbnail());
+
+                return $bookmark;
             })
         ;