diff --git a/apps/tests/app/mainPage.ts b/apps/tests/app/mainPage.ts
index 7d3c09f99..d204b2b47 100644
--- a/apps/tests/app/mainPage.ts
+++ b/apps/tests/app/mainPage.ts
@@ -1,4 +1,5 @@
 import {Page} from "ui/page";
+import * as trace from "trace";
 import tests = require("../testRunner");
 
 trace.enable();