diff --git a/package.json b/package.json
index 1d2b1a047..4c1e90573 100644
--- a/package.json
+++ b/package.json
@@ -53,6 +53,7 @@
     "babel-plugin-syntax-jsx": "^6.18.0",
     "babel-plugin-transform-runtime": "^6.15.0",
     "babel-plugin-transform-vue-jsx": "^3.3.0",
+    "babel-polyfill": "^6.23.0",
     "babel-preset-es2015": "^6.16.0",
     "babel-runtime": "^6.11.0",
     "cheerio": "^0.22.0",
@@ -86,6 +87,11 @@
     "karma": "^1.5.0",
     "karma-chrome-launcher": "^2.0.0",
     "karma-coverage": "^1.1.1",
+    "karma-mocha": "^1.3.0",
+    "karma-sinon-chai": "^1.2.4",
+    "karma-sourcemap-loader": "^0.3.7",
+    "karma-spec-reporter": "0.0.30",
+    "karma-webpack": "^2.0.2",
     "lerna": "2.0.0-beta.31",
     "lolex": "^1.5.1",
     "markdown-it": "^6.1.1",
diff --git a/test/unit/karma.conf.js b/test/unit/karma.conf.js
index ab02fe3d7..c2cd1e3df 100644
--- a/test/unit/karma.conf.js
+++ b/test/unit/karma.conf.js
@@ -1,3 +1,9 @@
+require('babel-polyfill');
+
+require('babel-core/register')({
+  presets: [require('babel-preset-es2015')]
+});
+
 var webpackConfig = require('./get-webpack-conf');
 
 module.exports = function(config) {