diff --git a/knockout/knockout-tests.ts b/knockout/knockout-tests.ts
index 82974af143..ab7b37e15e 100644
--- a/knockout/knockout-tests.ts
+++ b/knockout/knockout-tests.ts
@@ -1,5 +1,5 @@
 /// <reference path="knockout-2.2.d.ts" />
-/// <reference path="knockoutmapping-2.0.d.ts" />
+/// <reference path="../knockout.mapping/knockout.mapping-2.0.d.ts" />
 
 declare var $;