def METHOD_NAME(self):
    informatieobjecttype = InformatieObjectTypeFactory.create(concept=False)
    canonical = EnkelvoudigInformatieObjectCanonicalFactory.create(
        latest_version=None
    )
    add_url = reverse("admin:documenten_enkelvoudiginformatieobject_add")
    data = {
        "uuid": uuid.uuid4(),
        "_informatieobjecttype": informatieobjecttype.id,
        "canonical": canonical.id,
        "bronorganisatie": "517439943",
        "creatiedatum": "15-11-2019",
        "titel": "detailed summary",
        "auteur": "test_auteur",
        "formaat": "txt",
        "taal": "eng",
        "bestandsnaam": "dummy.txt",
        "inhoud": SimpleUploadedFile("file_name.txt", b"file contents"),
        "beschrijving": "desc",
        "versie": 1,
    }
    self.client.post(add_url, data)
    self.assertEqual(EnkelvoudigInformatieObject.objects.count(), 1)
    return EnkelvoudigInformatieObject.objects.get()