diff --git a/aio/src/test-specs.ts b/aio/src/test-specs.ts
deleted file mode 100644
index 296d19078a..0000000000
--- a/aio/src/test-specs.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-// Find all the tests.
-const context = (<any>require).context('./', true, /\.spec\.ts$/);
-// And load the modules.
-context.keys().map(context);
diff --git a/aio/src/test.ts b/aio/src/test.ts
index 949eddf8d7..cd612eeb0e 100644
--- a/aio/src/test.ts
+++ b/aio/src/test.ts
@@ -1,6 +1,5 @@
 // This file is required by karma.conf.js and loads recursively all the .spec and framework files
 
-// Test dependencies.
 import 'zone.js/dist/long-stack-trace-zone';
 import 'zone.js/dist/proxy.js';
 import 'zone.js/dist/sync-test';
@@ -13,25 +12,9 @@ import {
   platformBrowserDynamicTesting
 } from '@angular/platform-browser-dynamic/testing';
 
-// List vendors here to increase test rebuild performance.
-import '@angular/animations';
-import '@angular/common';
-import '@angular/common/testing';
-import '@angular/common/http';
-import '@angular/common/http/testing';
-import '@angular/core/';
-import '@angular/core/testing';
-import '@angular/material';
-import '@angular/platform-browser';
-import '@angular/platform-browser/testing';
-import '@angular/platform-browser/animations';
-import '@angular/platform-browser-dynamic';
-import '@angular/platform-browser-dynamic/testing';
-import '@angular/service-worker';
-import 'rxjs'; // tslint:disable-line
-
 // Unfortunately there's no typing for the `__karma__` variable. Just declare it as any.
-declare var __karma__: any;
+declare const __karma__: any;
+declare const require: any;
 
 // Prevent Karma from running prematurely.
 __karma__.loaded = function () {};
@@ -41,9 +24,9 @@ getTestBed().initTestEnvironment(
   BrowserDynamicTestingModule,
   platformBrowserDynamicTesting()
 );
-
-declare var System: any;
 // Then we find all the tests.
-System.import('./test-specs.ts')
-  // Finally, start Karma to run the tests.
-  .then(() => __karma__.start());
+const context = require.context('./', true, /\.spec\.ts$/);
+// And load the modules.
+context.keys().map(context);
+// Finally, start Karma to run the tests.
+__karma__.start();