diff --git a/tests/Doctrine/UserManagerTest.php b/tests/Doctrine/UserManagerTest.php
index 41a30dc9d..ed9bf9f37 100644
--- a/tests/Doctrine/UserManagerTest.php
+++ b/tests/Doctrine/UserManagerTest.php
@@ -80,7 +80,7 @@ public function testGetClass()
     public function testFindUserBy()
     {
         $crit = ['foo' => 'bar'];
-        $this->repository->expects($this->once())->method('findOneBy')->with($this->equalTo($crit))->will($this->returnValue([]));
+        $this->repository->expects($this->once())->method('findOneBy')->with($this->equalTo($crit))->will($this->returnValue(null));
 
         $this->userManager->findUserBy($crit);
     }