diff --git a/Gruntfile.js b/Gruntfile.js
index 3210294536..c33d334a8e 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -135,6 +135,7 @@ module.exports = function(grunt) {
     },
     qunit: {
         options: {
+            timeout: 300000,
             puppeteer: {
                 headless: true,
                 args: [