diff --git a/dragula/dragula-amd-tests.ts b/dragula/dragula-amd-tests.ts
index 99cb5e043f..0dcca91e23 100644
--- a/dragula/dragula-amd-tests.ts
+++ b/dragula/dragula-amd-tests.ts
@@ -1,3 +1,5 @@
+/// <reference path="./dragula.d.ts" />
+
 import dragula = require("dragula");
 
 // containers