diff --git a/tests/Fixtures/TestBundle/Entity/DummyCar.php b/tests/Fixtures/TestBundle/Entity/DummyCar.php
index 9fa15c8e634..6b383243f8b 100644
--- a/tests/Fixtures/TestBundle/Entity/DummyCar.php
+++ b/tests/Fixtures/TestBundle/Entity/DummyCar.php
@@ -45,7 +45,7 @@ class DummyCar
      * @var DummyCarIdentifier The entity Id
      *
      * @ORM\Id
-     * @ORM\OneToOne(targetEntity="DummyCarIdentifier", cascade="persist")
+     * @ORM\OneToOne(targetEntity="DummyCarIdentifier", cascade={"persist"})
      */
     private $id;