Angular 2.1 Cannot set base providers because it has already been called(…)

I'm trying to test a basic angular 2 component that Includes a service. When I run my test I'm getting the following errors. The component, service and test are pretty small, they run fine in the browser as well. I'm not sure what I am missing from the test in order for it to work. Any help is appreciated. ``` Uncaught Error: Cannot set base providers because it has already been called(…) Uncaught Error: Error in ./TestComponent class TestComponent - inline template:0:0 caused by: No provider for Http! Error: No provider for Http! at NoProviderError.BaseError [as constructor] (http://localhost:9876/base/karma-shim.js:4006:34) at NoProviderError.AbstractProviderError [as constructor] (http://localhost:9876/base/karma-shim.js:33221:16) at new NoProviderError (http://localhost:9876/base/karma-shim.js:33252:16) at ReflectiveInjector_._throwOrNull (http://localhost:9876/base/karma-shim.js:57969:19) at ReflectiveInjector_._getByKeyDefault (http://localhost:9876/base/karma-shim.js:57997:25) at ReflectiveInjector_._getByKey (http://localhost:9876/base/karma-shim.js:57960:25) at ReflectiveInjector_.get (http://localhost:9876/base/karma-shim.js:57769:21) at TestBed.get (http://localhost:9876/base/karma-shim.js:5778:67) at ElementInjector.get (http://localhost:9876/base/karma-shim.js:58133:48) at _View_TestComponent0.createInternal (TestComponent.ngfactory.js:21:68) at _View_TestComponent0.AppView.create (http://localhost:9876/base/karma-shim.js:58492:21) at _View_TestComponent0.DebugAppView.create (http://localhost:9876/base/karma-shim.js:58704:44) at _View_TestComponent_Host0.createInternal (TestComponent_Host.ngfactory.js:18:14) at _View_TestComponent_Host0.AppView.create (http://localhost:9876/base/karma-shim.js:58492:21) at _View_TestComponent_Host0.DebugAppView.create (http://localhost:9876/base/karma-shim.js:58704:44) at ComponentFactory.create (http://localhost:9876/base/karma-shim.js:33751:36) at initComponent (http://localhost:9876/base/karma-shim.js:5816:53) at ZoneDelegate.invoke (http://localhost:9876/base/karma-shim.js:48531:26) at ProxyZoneSpec.onInvoke (http://localhost:9876/base/karma-shim.js:48195:39) at ZoneDelegate.invoke (http://localhost:9876/base/karma-shim.js:48530:32) at Object.onInvoke (http://localhost:9876/base/karma-shim.js:22909:37) at ZoneDelegate.invoke (http://localhost:9876/base/karma-shim.js:48530:32) at Zone.run (http://localhost:9876/base/karma-shim.js:48413:43) at NgZone.run (http://localhost:9876/base/karma-shim.js:22799:62) at TestBed.createComponent (http://localhost:9876/base/karma-shim.js:5819:62) at Function.TestBed.createComponent (http://localhost:9876/base/karma-shim.js:5634:33) at Object.<anonymous> (http://localhost:9876/base/karma-shim.js:63273:41) at ZoneDelegate.invoke (http://localhost:9876/base/karma-shim.js:48531:26) at ProxyZoneSpec.onInvoke (http://localhost:9876/base/karma-shim.js:48195:39) at ZoneDelegate.invoke (http://localhost:9876/base/karma-shim.js:48530:32) at Zone.run (http://localhost:9876/base/karma-shim.js:48413:43) at Object.<anonymous> (http://localhost:9876/base/karma-shim.js:47910:34) at ZoneQueueRunner.jasmine.QueueRunner.ZoneQueueRunner.execute (http://localhost:9876/base/karma-shim.js:47940:42) at ZoneQueueRunner.jasmine.QueueRunner.ZoneQueueRunner.execute (http://localhost:9876/base/karma-shim.js:47940:42) at ZoneDelegate.invokeTask (http://localhost:9876/base/karma-shim.js:48564:35) at Zone.runTask (http://localhost:9876/base/karma-shim.js:48453:47) at drainMicroTaskQueue (http://localhost:9876/base/karma-shim.js:48700:35) ``` !-- the component ``` import { Component, OnInit } from '@angular/core'; import { TestService } from '../components/service/TestService'; @Component({ selector: 'my-home', templateUrl: './home.component.html', styleUrls: ['./home.component.scss'], providers: [TestService] }) export class HomeComponent implements OnInit { constructor(private testService: TestService) { // Do stuff } ngOnInit() { console.log('Hello Home', this.testService.getUsers()); } } ``` !-- the service ``` import { Injectable } from '@angular/core'; import { Http } from '@angular/http'; @Injectable() export class TestService { constructor(public http: Http) {} getUsers() { return this.http.get('http://foo.bar'); } } ``` !-- the test ``` import { inject, TestBed } from '@angular/core/testing'; import {BaseRequestOptions, Response, ResponseOptions, Http} from '@angular/http'; import { MockBackend, MockConnection } from '@angular/http/testing'; import { BrowserDynamicTestingModule, platformBrowserDynamicTesting } from '@angular/platform-browser-dynamic/testing'; import {TestService} from './TestService'; TestBed.initTestEnvironment(BrowserDynamicTestingModule, platformBrowserDynamicTesting()); describe('Http', () => { beforeEach(() => { TestBed.configureTestingModule({ providers: [ TestService, BaseRequestOptions, MockBackend, { provide: Http, useFactory: (backend: MockBackend, defaultOptions: BaseRequestOptions) => { return new Http(backend, defaultOptions); }, deps: [MockBackend, BaseRequestOptions], }, ], }); }); beforeEach(inject([MockBackend], (backend: MockBackend) => { const baseResponse = new Response(new ResponseOptions({ body: 'got response' })); backend.connections.subscribe((c: MockConnection) => c.mockRespond(baseResponse)); })); it('should return response when subscribed to getUsers', inject([TestService], (testService: TestService) => { testService.getUsers().subscribe((res: Response) => { expect(res.text()).toBe('got response'); }); })); }); ```