diff --git a/test/cloudron-button-test.js b/test/cloudron-button-test.js
index a456a63..f645af3 100644
--- a/test/cloudron-button-test.js
+++ b/test/cloudron-button-test.js
@@ -9,7 +9,8 @@ var AppStore = require('../appstore.js'),
     Cloudron = require('../cloudron.js'),
     common = require('../common.js'),
     dns = require('dns'),
-    request = require('superagent-sync');
+    request = require('superagent-sync'),
+    sleep = require('sleep').sleep;
 
 require('colors');