Angular 'should create' unit-test fails with error 'TypeError: Cannot read properties of undefined (reading 'parent')'

Question

First basic unit test of each component:

it('should create', () => {
  expect(component).toBeTruthy();
});

fails with error:

TypeError: Cannot read properties of undefined (reading 'parent')
at componentName.routerSubscribe

I assume that solution is pretty obvious but can't find the answer