diff --git a/tests/lib/files/mount/mount.php b/tests/lib/files/mount/mount.php
index b057204ad3552929e7f932214e747cf55e6461a2..c3d33e0870b9c45df0e32dbbbf163bc7dcd79f9c 100644
--- a/tests/lib/files/mount/mount.php
+++ b/tests/lib/files/mount/mount.php
@@ -35,7 +35,7 @@ class Mount extends \PHPUnit_Framework_TestCase {
 		};
 
 		$loader = new Loader();
-		$loader->addStorageWrapper($wrapper);
+		$loader->addStorageWrapper('test_wrapper', $wrapper);
 
 		$storage = $this->getMockBuilder('\OC\Files\Storage\Temporary')
 			->disableOriginalConstructor()