diff --git a/plugins/pullrequest/www/js/angular/karma.config.js b/plugins/pullrequest/www/js/angular/karma.config.js
index 1e6a09468e4..4ab09cd0cb8 100644
--- a/plugins/pullrequest/www/js/angular/karma.config.js
+++ b/plugins/pullrequest/www/js/angular/karma.config.js
@@ -45,5 +45,6 @@ module.exports = {
      * the aesthetic advantage of not launching a browser every time you save.
      */
     browsers: [process.platform !== 'linux' ? 'ChromeHeadless' : 'ChromiumHeadless'],
+    browserNoActivityTimeout: 20000,
     logLevel: 'INFO'
 };