def METHOD_NAME(self):
    # Make sure that the Signals created in setUp() method do not affect
    # this test:
    status = StatusFactory.create(text='xyz', state=workflow.BEHANDELING, _signal=self.signal_reaction_requested)
    self.signal_reaction_requested.status = status
    self.signal_reaction_requested.save()
    with freeze_time(now() - timedelta(days=2 * REACTION_REQUEST_DAYS_OPEN)):
        # Five signals that were in state REACTIE_GEVRAAGD and too old to
        # still receive an update.
        SignalFactory.create_batch(5, status__state=workflow.REACTIE_GEVRAAGD)
    with freeze_time(now() - timedelta(days=REACTION_REQUEST_DAYS_OPEN // 2)):
        # Five signals that were in state REACTIE_GEVRAAGD and may still
        # get an update.
        SignalFactory.create_batch(5, status__state=workflow.REACTIE_GEVRAAGD)
    self.assertEqual(Signal.objects.count(), 12)
    n_updated = clean_up_reaction_request()
    self.assertEqual(n_updated, 5)
    reactie_gevraagd = Signal.objects.filter(status__state=workflow.REACTIE_GEVRAAGD)
    reactie_ontvangen = Signal.objects.filter(status__state=workflow.REACTIE_ONTVANGEN)
    self.assertEqual(reactie_gevraagd.count(), 5)
    self.assertEqual(reactie_ontvangen.count(), 5)