diff --git a/lib/core/imports/index.js b/lib/core/imports/index.js
index 6e82f39c2f..9b81dbf878 100644
--- a/lib/core/imports/index.js
+++ b/lib/core/imports/index.js
@@ -10,7 +10,9 @@
  * Polyfill `Promise`
  * Reference: https://www.npmjs.com/package/es6-promise
  */
-require('es6-promise').polyfill();
+if (!('Promise' in window)) {
+	require('es6-promise').polyfill();
+}
 
 /**
  * Namespace `axe.imports` which holds required external dependencies