def METHOD_NAME(
    slot, other_slot, accepted_submission, submission, rejected_submission
):
    event = slot.submission.event
    with scope(event=event):
        other_slot.submission.speakers.add(slot.submission.speakers.first())
        assert len(event.talks.all()) == len(set(event.talks.all()))
        assert len(event.speakers.all()) == len(set(event.speakers.all()))