diff --git a/karma.conf.js b/karma.conf.js
index d2564bad..1d9bc198 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -46,6 +46,7 @@ module.exports = function (config) {
         //load angular dependencies and browser polyfills
         files: [
           'node_modules/zone.js/dist/zone-microtask.js',
+          'node_modules/zone.js/dist/long-stack-trace-zone.js',
           'node_modules/babel-polyfill/dist/polyfill.js',
           'node_modules/reflect-metadata/Reflect.js'
         ],