I imported the HTTP client in my ngmodel array but when I run my tests I still get the No provider for HttpClient! error. Am I maybe missing an import in the tests itself? Every test from every component gives this error. Even if its just a simple check if the strings are the same. Not sure what I am doing wrong here My code from app.module : import { NgModule, isDevMode } from '@angular/core'; import { QuillModule } from 'ngx-quill'; import { BrowserModule } from '@angular/platform-browser'; import { AppRoutingModule } from './app-routing.module'; import { AppComponent } from './app.component'; import { NavComponent } from './shared/nav/nav.component'; import { ServiceWorkerModule } from '@angular/service-worker'; import { FooterComponent } from './shared/footer/footer.component'; import { FormsModule } from "@angular/forms"; import { LoginComponent } from './pages/account/login/login.component'; import { RegistrationComponent } from './pages/account/registration/registration.component'; import { NotificationsComponent } from './pages/notifications/notifications.component'; import { HomepageComponent } from './pages/homepage/homepage.component'; import { PostComponent } from './partial/post/post.component'; import { LandingComponent } from './pages/landing/landing.component'; import { CreatePostMenuComponent } from './partial/create-post-menu/create-post-menu.component'; import { SettingsComponent } from './pages/settings/settings.component'; import { HttpClientModule } from '@angular/common/http'; import Quill from "quill"; import { QuillHandlers } from "./handlers/quill.handlers"; import { CommunityListComponent } from './pages/community/community-list/community-list.component'; import { CommunityCardComponent } from './partial/community-card/community-card.component'; import { CreateCommunityMenuComponent } from './partial/create-community-menu/create-community-menu.component'; import { ImageCropperModule } from 'ngx-image-cropper'; import { CommunityBannerComponent } from './partial/community-banner/community-banner.component'; import { CommunityDetailComponent } from './pages/community/community-detail/community-detail.component'; import { AccountDetailComponent } from './pages/account/account-detail/account-detail.component'; const FontAttributor = Quill.import('attributors/class/font'); FontAttributor.whitelist = [ 'Gotham', ]; Quill.register(FontAttributor, true); @NgModule({ declarations: [ AppComponent, NavComponent, FooterComponent, LoginComponent, NotificationsComponent, HomepageComponent, PostComponent, LandingComponent, CreatePostMenuComponent, SettingsComponent, RegistrationComponent, CommunityListComponent, CommunityCardComponent, CreateCommunityMenuComponent, CommunityDetailComponent, CommunityBannerComponent, AccountDetailComponent, ], imports: [ BrowserModule, AppRoutingModule, ServiceWorkerModule.register('ngsw-worker.js', { enabled: !isDevMode(), // Register the ServiceWorker as soon as the application is stable // or after 30 seconds (whichever comes first). registrationStrategy: 'registerWhenStable:30000' }), QuillModule.forRoot({ modules: { syntax: true, toolbar: [], }, customOptions: [{ import: 'formats/font', whitelist: ['Gotham'], }], suppressGlobalRegisterWarning: true, }), FormsModule, ImageCropperModule, HttpClientModule, ], providers: [ QuillHandlers, ], bootstrap: [AppComponent] }) export class AppModule { } My test code : import { ComponentFixture, TestBed } from '@angular/core/testing'; import { GenericService } from 'src/app/services/API/generic.service'; import { CommunityDetailComponent } from './community-detail.component'; import { HttpClientTestingModule } from '@angular/common/http/testing'; import { HttpClientModule } from '@angular/common/http'; describe('CommunityDetailComponent', () => { let component: CommunityDetailComponent; let fixture: ComponentFixture<CommunityDetailComponent>; const testString = "test"; beforeEach(async () => { await TestBed.configureTestingModule({ imports: [HttpClientTestingModule, HttpClientTestingModule ], declarations: [ CommunityDetailComponent ] }) .compileComponents(); fixture = TestBed.createComponent(CommunityDetailComponent); component = fixture.componentInstance; fixture.detectChanges(); }); it('should create', () => { expect(component).toBeTruthy(); }); it('tester', () => { expect("test").toBe(testString) }); }); Specific error : NullInjectorError: R3InjectorError(DynamicTestModule)[ActivatedRoute -> ActivatedRoute]: NullInjectorError: No provider for ActivatedRoute! import { Component } from '@angular/core'; import { ActivatedRoute, Router } from '@angular/router'; import { Subscription } from 'rxjs'; import { EnrollmentService } from 'src/app/services/API/enrollment.service'; import { CommonService } from 'src/app/services/common.service'; import { SweetAlert } from '../../../helpers/sweetalert.service'; import { Community } from '../../../models/domain/Community'; import { CommunityService } from '../../../services/API/community.service'; @Component({ selector: 'app-community-detail', templateUrl: './community-detail.component.html', styleUrls: ['./community-detail.component.scss'] }) export class CommunityDetailComponent { community!: Community; subscription!: Subscription; communityId!: string | null; dataLoaded: boolean = false; constructor(private communityService: CommunityService, private enrollmentService: EnrollmentService, private route: ActivatedRoute, private router: Router, private commonService : CommonService) { } ngOnInit(): void { this.route.paramMap.subscribe((params) => { this.communityId = params.get('id'); if (this.communityId) { console.log("community detail got param community id:" + this.communityId) this.getCommunity(); } else { SweetAlert.showErrorAlert("Kan geen community geven met het opgegeven id.") this.router.navigateByUrl('community'); } }); this.commonService.getUpdate().subscribe((data) => { this.getCommunity(); }); } //api cal to enroll the currently logged in user for the community //0 represents the role 'MEMBER' joinCommunity(): void { this.subscription = this.enrollmentService.enroll(this.communityId!, 2).subscribe({ next: (v) => { SweetAlert.showSuccessAlert("Je bent nu lid van deze community!") console.log(v) }, error: () => SweetAlert.showErrorAlert("Er is iets misgegaan, je bent mogelijk al lid van deze community."), complete: () => console.log('joining community complete (ui)'), }); } //api call to get the community with the id from the route params. private getCommunity() { console.log("get community called") this.subscription = this.communityService.get(this.communityId!).subscribe({ next: (v) => { console.log(v); this.community = v; }, error: (e) => console.log("Error when Getting community"), complete: () => console.log('getting community complete (ui)'), }); } } Continue reading...