diff --git a/tests/lib/user/backend.php b/tests/lib/user/backend.php
index 40674424c96efb918f0c518532566122a4c60e80..62ea0befbd786d028deee5b27e1333644b791217 100644
--- a/tests/lib/user/backend.php
+++ b/tests/lib/user/backend.php
@@ -39,7 +39,7 @@ abstract class Test_User_Backend extends PHPUnit_Framework_TestCase {
 	/**
 	 * get a new unique user name
 	 * test cases can override this in order to clean up created user
-	 * @return array
+	 * @return string
 	 */
 	public function getUser() {
 		return uniqid('test_');