diff --git a/Tests/Repository/ContainerRepositoryFactoryTest.php b/Tests/Repository/ContainerRepositoryFactoryTest.php
index 28dbd3c11..eac247801 100644
--- a/Tests/Repository/ContainerRepositoryFactoryTest.php
+++ b/Tests/Repository/ContainerRepositoryFactoryTest.php
@@ -210,7 +210,7 @@ public function findOneBy(array $criteria)
 
     public function getClassName(): string
     {
-        return '';
+        return stdClass::class;
     }
 }