diff --git a/eZ/Publish/Core/Persistence/Legacy/Content/Handler.php b/eZ/Publish/Core/Persistence/Legacy/Content/Handler.php
index 66b81eeeef..430f3b7b8a 100644
--- a/eZ/Publish/Core/Persistence/Legacy/Content/Handler.php
+++ b/eZ/Publish/Core/Persistence/Legacy/Content/Handler.php
@@ -263,6 +263,8 @@ public function publish($contentId, $versionNo, MetadataUpdateStruct $metaDataUp
      * @param string|null $languageCode
      *
      * @return \eZ\Publish\SPI\Persistence\Content
+     *
+     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException
      */
     public function createDraftFromVersion($contentId, $srcVersion, $userId, ?string $languageCode = null)
     {
diff --git a/eZ/Publish/Core/Persistence/Legacy/Tests/Content/ContentHandlerTest.php b/eZ/Publish/Core/Persistence/Legacy/Tests/Content/ContentHandlerTest.php
index d815e4c2ee..133e8904f5 100644
--- a/eZ/Publish/Core/Persistence/Legacy/Tests/Content/ContentHandlerTest.php
+++ b/eZ/Publish/Core/Persistence/Legacy/Tests/Content/ContentHandlerTest.php
@@ -110,9 +110,9 @@ class ContentHandlerTest extends TestCase
     protected $contentTypeHandlerMock;
 
     /**
-     * @var \eZ\Publish\Core\Persistence\Legacy\Content\Language\Handler
+     * @var \PHPUnit\Framework\MockObject\MockObject&\eZ\Publish\Core\Persistence\Legacy\Content\Language\Handler
      */
-    protected $languageHandlerMock;
+    private $languageHandlerMock;
 
     /**
      * @covers \eZ\Publish\Core\Persistence\Legacy\Content\Handler::create
@@ -1617,7 +1617,7 @@ protected function getContentTypeHandlerMock()
     }
 
     /**
-     * @return \PHPUnit\Framework\MockObject\MockObject|\eZ\Publish\Core\Persistence\Legacy\Content\Language\Handler
+     * @return \PHPUnit\Framework\MockObject\MockObject&\eZ\Publish\Core\Persistence\Legacy\Content\Language\Handler
      */
     protected function getLanguageHandlerMock(): LanguageHandler
     {