diff --git a/test/cloudron-backup-test.js b/test/cloudron-backup-test.js
index 60a7ef7..c12d6b3 100644
--- a/test/cloudron-backup-test.js
+++ b/test/cloudron-backup-test.js
@@ -15,6 +15,7 @@ var AppStore = require('../appstore.js'),
     readlineSync = require('readline-sync'),
     request = require('superagent-sync'),
     semver = require('semver'),
+    sleep = require('sleep').sleep,
     util = require('util');
 
 require('colors');