diff --git a/karma-shared.conf.js b/karma-shared.conf.js
index 08ce6bbb..44e4e0aa 100644
--- a/karma-shared.conf.js
+++ b/karma-shared.conf.js
@@ -6,6 +6,7 @@ module.exports = function(config, specificOptions) {
     logColors: true,
     browsers: ['Chrome'],
     browserDisconnectTimeout: 10000,
+    browserDisconnectTolerance: 2,
 
 
     // config for Travis CI