diff --git a/smtpapi/smtpapi-tests.ts b/smtpapi/smtpapi-tests.ts
index b9d3329889..f5e437386f 100644
--- a/smtpapi/smtpapi-tests.ts
+++ b/smtpapi/smtpapi-tests.ts
@@ -2,7 +2,7 @@
  * Created from usage code samples from //github.com/sendgrid/smtpapi-nodejs#usage
  */
 
-///<reference path="smtpapi-nodejs.d.ts" />
+///<reference path="smtpapi.d.ts" />
 
 import smtpapi = require("smtpapi");
 var header = new smtpapi();