diff --git a/apps/files_external/lib/config.php b/apps/files_external/lib/config.php
index cd3e7f3a4a..94dc5fb7ad 100755
--- a/apps/files_external/lib/config.php
+++ b/apps/files_external/lib/config.php
@@ -277,21 +277,15 @@ class OC_Mount_Config {
 										 $mountType,
 										 $applicable,
 										 $isPersonal = false) {
-		$backends = self::getBackends();
 		$mountPoint = OC\Files\Filesystem::normalizePath($mountPoint);
 		if ($mountPoint === '' || $mountPoint === '/' || $mountPoint == '/Shared') {
 			// can't mount at root or "Shared" folder
 			return false;
 		}
-
-		if (!isset($backends[$class])) {
-			// invalid backend
-			return false;
-		}	
 		if ($isPersonal) {
 			// Verify that the mount point applies for the current user
 			// Prevent non-admin users from mounting local storage
-			if ($applicable !== OCP\User::getUser() || strtolower($class) === '\oc\files\storage\local') {
+			if ($applicable != OCP\User::getUser() || $class == '\OC\Files\Storage\Local') {
 				return false;
 			}
 			$mountPoint = '/'.$applicable.'/files/'.ltrim($mountPoint, '/');
diff --git a/apps/files_external/tests/mountconfig.php b/apps/files_external/tests/mountconfig.php
index 4c61b8961f..941aec680b 100644
--- a/apps/files_external/tests/mountconfig.php
+++ b/apps/files_external/tests/mountconfig.php
@@ -48,28 +48,4 @@ class Test_Mount_Config extends \PHPUnit_Framework_TestCase {
 		$this->assertEquals(false, OC_Mount_Config::addMountPoint('/Shared', $storageClass, array(), $mountType, $applicable, $isPersonal));
 
 	}
-
-	public function testAddMountPointSingleUser() {
-		\OC_User::setUserId('test');
-		$mountType = 'user';
-		$applicable = 'test';
-		$isPersonal = true;
-		// local
-		$this->assertEquals(false, OC_Mount_Config::addMountPoint('/ext', '\OC\Files\storage\local', array(), $mountType, $applicable, $isPersonal));
-		// non-local
-		$this->assertEquals(true, OC_Mount_Config::addMountPoint('/ext', '\OC\Files\Storage\SFTP', array(), $mountType, $applicable, $isPersonal));
-
-	}
-
-	public function testAddMountPointUnexistClass() {
-		\OC_User::setUserId('test');
-		$storageClass = 'Unexist_Storage';
-		$mountType = 'user';
-		$applicable = 'test';
-		$isPersonal = true;
-		// local
-		// non-local
-		$this->assertEquals(false, OC_Mount_Config::addMountPoint('/ext', $storageClass, array(), $mountType, $applicable, $isPersonal));
-
-	}
 }