Testing OnPush components in Angular 2

I am having trouble testing a component with OnPush change detection strategy.

The test goes like this

it('should show edit button for featured only for owners', () => {
    let selector = '.edit-button';

    component.isOwner = false;
    fixture.detectChanges();

    expect(fixture.debugElement.query(By.css(selector))).toBeFalsy();

    component.isOwner = true;
    fixture.detectChanges();

    expect(fixture.debugElement.query(By.css(selector))).toBeTruthy();
});

If I use Default strategy it works as expected, but with OnPush the change to isOwner is not rerendered by the call to detectChanges. Am I missing something?