HttpTestingController.expectOne() with queryparameters

i am new to angular testing using Jasmine/Karma , i encoutered a problem while testing an angular service using HttpTestingController . here is a part of the source code :

getProfile(userName: string) {
    let config = {
      params: {
        user_id: "test"    
      }
    }
    return this.http
      .get(`https://api.github.com/users/${userName}`, config);
  }

when calling the service using expectOne of HttpTestingController :

it('should add an Authorization header', () => {
let response;
userService.getProfile('blacksonic').subscribe(response => {
  expect(response).toBeTruthy();
});


const req = 
httpMock.expectOne({ method: 'GET', url:'https://api.github.com/users/blacksonic' });

});

i get the following error :

Error: Expected one matching request for criteria "Match method: GET, URL: https://api.github.com/users/blacksonic", found none. at HttpClientTestingBackend.expectOne (./node_modules/@angular/common/fesm5/http/testing.js?:301:19) at UserContext.eval (./src/app/Interceptors/Interceptor.spec.ts?:85:28) at ZoneDelegate.invoke (./node_modules/zone.js/dist/zone.js?:387:26) at ProxyZoneSpec.onInvoke (./node_modules/zone.js/dist/zone-testing.js?:287:39) at ZoneDelegate.invoke (./node_modules/zone.js/dist/zone.js?:386:32) at Zone.run (./node_modules/zone.js/dist/zone.js?:137:43) at runInTestZone (./node_modules/zone.js/dist/zone-testing.js?:508:34) at UserContext.eval (./node_modules/zone.js/dist/zone-testing.js?:523:20)