diff --git a/test/test-helper.js b/test/test-helper.js
index 6c534dd31..565e454ee 100644
--- a/test/test-helper.js
+++ b/test/test-helper.js
@@ -8,5 +8,5 @@ if (typeof window === 'undefined') {
   global.expect = global.chai.expect;
 } else {
   window.axios = StellarSdk.axios;
-  window.bluebird = StellarSdk.bluebird;
+  window.Promise = window.bluebird = StellarSdk.bluebird;
 }