diff --git a/passport-google-oauth/passport-google-oauth-tests.ts b/passport-google-oauth/passport-google-oauth-tests.ts
index 60fad97b41..ef7a4e9ef9 100644
--- a/passport-google-oauth/passport-google-oauth-tests.ts
+++ b/passport-google-oauth/passport-google-oauth-tests.ts
@@ -1,3 +1,5 @@
+/// <reference path="./passport-google-oauth.d.ts" />
+
 /**
  * Created by jcabresos on 4/19/2014.
  */