def METHOD_NAME(api_user: DeSECAPIV1Client):
    assert len(api_user.domain_list()) == 0
    assert api_user.domain_create(random_domainname()).status_code == 201
    assert len(api_user.domain_list()) == 1
    assert_all_ns(
        assertion=lambda query: query(api_user.domain, 'SOA')[0].serial >= int(time.time()),
        retry_on=(AssertionError, TypeError),
    )