Ng test error

[dorianboulch]

Hello

I have an error when I'm starting ng test command.
It returns : The spinning preloader container was not found

In my app.component.spec.ts I have :

import {NgSpinningPreloader} from 'ng2-spinning-preloader';


TestBed.configureTestingModule({
        providers: [
            ...,
            NgSpinningPreloader
        ],
        declarations: [
            AppComponent,
            ...
        ],
        imports: [
            RouterTestingModule,
            ...
        ],
        schemas: [
            CUSTOM_ELEMENTS_SCHEMA
        ]
    });