diff --git a/lib/middleware/karma.js b/lib/middleware/karma.js
index c9beec6bb..d3de85dfa 100644
--- a/lib/middleware/karma.js
+++ b/lib/middleware/karma.js
@@ -27,7 +27,7 @@ var urlparse = function (urlStr) {
var common = require('./common')
var VERSION = require('../constants').VERSION
-var SCRIPT_TAG = ''
+var SCRIPT_TAG = ''
var LINK_TAG_CSS = ''
var LINK_TAG_HTML = ''
var SCRIPT_TYPE = {