diff --git a/types/googlemaps/googlemaps-tests.ts b/types/googlemaps/googlemaps-tests.ts
index fd7d6057b7..0e26cce625 100644
--- a/types/googlemaps/googlemaps-tests.ts
+++ b/types/googlemaps/googlemaps-tests.ts
@@ -1,3 +1,5 @@
+/// <reference path="index.d.ts" />
+
 // Test file for Google Maps JavaScript API Definition file
 
 let mapOptions: google.maps.MapOptions = {