Fix tests

src/test/storage-provider-test.js

@@ -33,7 +33,8 @@ describe('Storage', function () {
         const gBackupConfig = {
             key: 'key',
             backupDir: null,
-            prefix: 'someprefix'
+            prefix: 'someprefix',
+            _provider: 'filesystem' // need this internal variable since we call the backend logic directly for testing
         };
 
         let defaultBackupSite;