TypeError when testing service with CacheBucket about cashew HOT 1 OPEN

describe('DocumentService', () => {
  const createService = createServiceFactory<DocumentService>({
    service: DocumentService,
    mocks: [HttpClient]
  });

  it('should call the endpoint', done => {
    const spectator = createService();
    const httpClient = spectator.inject(HttpClient);
    httpClient.get.andReturn(of({}));

    spectator.service
      .getDocument('documentId')
      .subscribe(() => {
        expect(httpClient.get).toHaveBeenCalledWith('/api/documents/documentId', {
          context: withCache({
            ttl: 10_000,
            bucket: service.bucket
          })
        });
        expect(service.bucket).toBeInstanceOf(Set);
        done();
      });
  });
});