def METHOD_NAME(self):
    """
    Because changes are made to the informatieobject, a code 200 should be
    returned
    """
    eio = EnkelvoudigInformatieObjectFactory.create(titel="bla")
    key = get_etag_cache_key(eio)
    _etag = eio.calculate_etag_value()
    set_etag(key, _etag)
    eio.titel = "aangepast"
    eio.save()
    response = self.client.get(reverse(eio), HTTP_IF_NONE_MATCH=f"{_etag}")
    self.assertEqual(response.status_code, status.HTTP_200_OK)