diff --git a/packages/http/testing/src/mock_backend.ts b/packages/http/testing/src/mock_backend.ts
index 31f72d68cf..5d6bdd173b 100644
--- a/packages/http/testing/src/mock_backend.ts
+++ b/packages/http/testing/src/mock_backend.ts
@@ -176,7 +176,7 @@ export class MockConnection implements Connection {
  *        this.heroService.getHeroes()
  *            .then((heroes: String[]) => result = heroes)
  *            .catch((error: any) => catchedError = error);
- *        this.lastConnection.mockRespond(new Response(new ResponseOptions({
+ *        this.lastConnection.mockError(new Response(new ResponseOptions({
  *          status: 404,
  *          statusText: 'URL not Found',
  *        })));