def METHOD_NAME(self):
    """
    Edit a zaak with an identificatie allowed by the API.
    This should not trigger validation errors.
    """
    zaak = ZaakFactory.create(identificatie="ZK bläh")
    url = reverse("admin:zaken_zaak_change", args=(zaak.pk,))
    response = self.app.get(url)
    self.assertEqual(response.form["identificatie"].value, "ZK bläh")
    submit_response = response.form.submit()
    self.assertEqual(submit_response.status_code, 302)