reverted:
--- b/core/modules/rest/tests/src/Functional/EntityResource/Media/MediaResourceTestBase.php
+++ a/core/modules/rest/tests/src/Functional/EntityResource/Media/MediaResourceTestBase.php
@@ -251,10 +251,10 @@
         return "The 'view media' permission is required and the media item must be published.";
 
       case 'PATCH':
+        return 'You are not authorized to update this media entity of bundle camelids.';
-        return 'You are not authorized to update this media item of bundle camelids.';
 
       case 'DELETE':
+        return 'You are not authorized to delete this media entity of bundle camelids.';
-        return 'You are not authorized to delete this media item of bundle camelids.';
 
       default:
         return parent::getExpectedUnauthorizedAccessMessage($method);