diff --git a/apps/user_ldap/group_ldap.php b/apps/user_ldap/group_ldap.php
index cf58e5b902d8..4fd029c74da9 100644
--- a/apps/user_ldap/group_ldap.php
+++ b/apps/user_ldap/group_ldap.php
@@ -33,7 +33,6 @@
 
 use OCA\user_ldap\lib\Access;
 use OCA\user_ldap\lib\BackendUtility;
-use OCA\user_ldap\lib\user\User;
 
 class GROUP_LDAP extends BackendUtility implements \OCP\GroupInterface {
 	protected $enabled = false;
@@ -198,11 +197,7 @@ private function _getGroupDNsFromMemberOf($DN, &$seen = null) {
 			return array();
 		}
 		$seen[$DN] = 1;
-		$user = $this->access->userManager->get($DN);
-		if(!$user instanceof User) {
-			return array();
-		}
-		$groups = $user->getMemberOfGroups();
+		$groups = $this->access->readAttribute($DN, 'memberOf');
 		if (!is_array($groups)) {
 			return array();
 		}
@@ -214,7 +209,7 @@ private function _getGroupDNsFromMemberOf($DN, &$seen = null) {
 				$subGroups = $this->_getGroupDNsFromMemberOf($group, $seen);
 				$allGroups = array_merge($allGroups, $subGroups);
 			}
-		}	
+		}
 		return $allGroups;	
 	}
 
diff --git a/apps/user_ldap/tests/group_ldap.php b/apps/user_ldap/tests/group_ldap.php
index 8ed2bc5c6772..49af5e3fe347 100644
--- a/apps/user_ldap/tests/group_ldap.php
+++ b/apps/user_ldap/tests/group_ldap.php
@@ -42,14 +42,9 @@ private function getAccessMock() {
 		$connector = $this->getMock('\OCA\user_ldap\lib\Connection',
 									$conMethods,
 									array($lw, null, null));
-		$um = new \OCA\user_ldap\lib\user\Manager(
-				$this->getMock('\OCP\IConfig'),
-				$this->getMock('\OCA\user_ldap\lib\FilesystemHelper'),
-				$this->getMock('\OCA\user_ldap\lib\LogWrapper'),
-				$this->getMock('\OCP\IAvatarManager'),
-				$this->getMock('\OCP\Image'),
-				$this->getMock('\OCP\IDBConnection')
-			);
+		$um = $this->getMockBuilder('\OCA\user_ldap\lib\user\Manager')
+			->disableOriginalConstructor()
+			->getMock();
 		$access = $this->getMock('\OCA\user_ldap\lib\Access',
 								 $accMethods,
 								 array($connector, $lw, $um));