diff --git a/karma.conf.js b/karma.conf.js
index 3944bc9..aa7d677 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -2,7 +2,10 @@ module.exports = function(config) {
   config.set({
     singleRun: true,
     basePath: '',
-    files: ['tests/dist/index.js'],
+    files: [
+      'node_modules/regenerator-runtime/runtime.js',
+      'tests/dist/index.js'
+    ],
     frameworks: ['mocha', 'chai'],
     reporters: ['mocha', 'summary'],
     client: {