diff --git a/angularjs/angular-tests.ts b/angularjs/angular-tests.ts
index bcfe31d167..0b68433098 100644
--- a/angularjs/angular-tests.ts
+++ b/angularjs/angular-tests.ts
@@ -20,7 +20,7 @@ angular.module('http-auth-interceptor', [])
          * Required by HTTP interceptor.
          * Function is attached to provider to be invisible for regular users of this service.
          */
-        this.pushToBuffer = function (config: ng.IRequestConfig, deferred: ng.IDeferred) {
+        this.pushToBuffer = function (config: ng.IRequestConfig, deferred: ng.IDeferred<any>) {
             buffer.push({
                 config: config,
                 deferred: deferred