Error testing any component with Ionic ion-infinite-scroll as child (Ionic 4)

Question

First off, this isn't a breaking issue, but I do not like the fact that running my unit tests is presenting an error. So anyways, if you create a page/component with Ionic and use the ion-infinite-scroll component, and then proceed to unit test this component, there will always be an error such as this:

An error was thrown in afterAll
  Uncaught TypeError: Cannot read property 'apply' of undefined thrown

Now this won't fail the test suite but it does show in the console and muddies it up. I have tried to mock this child component using ng-mocks but this still seems to present itself. I am using spectator with the default setup with Jasmine. I do not think this issue is related to using these tools. Does anyone have any idea on how to properly mock the ion-infinite-scroll component so test suite does not call methods on the actual component?

Here is what I've tried:

describe('SomePage', () => {
  let spectator: Spectator<SomePage>;

  const infiniteScrollStub = {
    complete: jasmine.createSpy('complete')
  };

  const createComponent = createRoutingFactory({
    component: SomePage,
    declarations: [
      IonInfiniteScroll
    ],
    providers: [
      { provide: IonInfiniteScroll, useValue: infiniteScrollStub }
    ],
    params: {}
  });

  beforeEach(() => spectator = createComponent());

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

===

An error was thrown in afterAll
  Uncaught TypeError: Cannot read property 'apply' of undefined thrown

---

describe('SomePage', () => {
  let spectator: Spectator<SomePage>;

  const infiniteScrollStub = {
    complete: jasmine.createSpy('complete')
  };

  const createComponent = createRoutingFactory({
    component: SomePage,
    declarations: [
      MockComponent(IonInfiniteScroll)
    ],
    params: {}
  });

  beforeEach(() => spectator = createComponent());

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

===

Error: Multiple components match node with tagname ion-infinite-scroll

The test passes on the first example with the ugly error at the end. The test fails on the second example with that reason.

Any ideas?