diff --git a/karma.conf.js b/karma.conf.js
index 16a904917cd..44257ec7d93 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -34,6 +34,12 @@ module.exports = function (config) {
       browserName: 'firefox',
       version: 'dev'
     },
+    sl_ie11: {
+      base: 'SauceLabs',
+      browserName: 'internet explorer',
+      platform: 'Windows 8.1',
+      version: '11'
+    },
     sl_safari9: {
       base: 'SauceLabs',
       browserName: 'safari',
diff --git a/spec/helpers/test-helper.js b/spec/helpers/test-helper.js
index 97bf5e80d8c..dcd1d77deb5 100644
--- a/spec/helpers/test-helper.js
+++ b/spec/helpers/test-helper.js
@@ -135,6 +135,13 @@ afterEach(function () {
   });
 
   global.__root__ = root;
+
+  //setup promise polyfill for browsers does not supports it
+  if (!(root.Promise || root.Rx && root.Rx.config && root.Rx.config.Promise)) {
+    Rx.config = {
+      Promise: require('promise')
+    };
+  }
 })();
 
 global.lowerCaseO = function lowerCaseO() {