diff --git a/promise-pool/promise-pool-tests.ts b/promise-pool/promise-pool-tests.ts
index 4f3bd40def..a9cc160bea 100644
--- a/promise-pool/promise-pool-tests.ts
+++ b/promise-pool/promise-pool-tests.ts
@@ -1,3 +1,5 @@
+/// <reference path="./promise-pool.d.ts" />
+
 import Q = require('q');
 import promisePool = require('promise-pool');
 
@@ -44,4 +46,4 @@ function onProgress(progress: promisePool.IProgress) {
     progress.fulfilled == 0;
     progress.total == 0;
     progress.index == 0;
-}
\ No newline at end of file
+}