diff --git a/passport-strategy/passport-strategy-tests.ts b/passport-strategy/passport-strategy-tests.ts
index e9c6fd604..ad5a9a38d 100644
--- a/passport-strategy/passport-strategy-tests.ts
+++ b/passport-strategy/passport-strategy-tests.ts
@@ -1,3 +1,4 @@
+/// <reference path="./passport-strategy.d.ts" />
 
 import express = require('express');
 import passport = require('passport-strategy');