diff --git a/test/dev/test.ts b/test/dev/test.ts
index e85e5d59..d5aedbb5 100644
--- a/test/dev/test.ts
+++ b/test/dev/test.ts
@@ -1,5 +1,9 @@
 'use strict';
 
+if (!(<any>global)._babelPolyfill) {
+    require('babel-polyfill');
+}
+
 const JavaScriptObfuscator: any = require("../../index");
 
 let obfuscatedCode: string = JavaScriptObfuscator.obfuscate(