diff --git a/client/karma.js b/client/karma.js
index 9e5f909d0..245fd9994 100644
--- a/client/karma.js
+++ b/client/karma.js
@@ -32,7 +32,9 @@ var Karma = function (socket, iframe, opener, navigator, location) {
         childWindow = opener('about:blank')
       }
       childWindow.location = url
-      reloadingContext = false
+      childWindow.onLoad = function () {
+        reloadingContext = false
+      }
     } else {
       iframe.src = url
       iframe.onLoad = function () {