def METHOD_NAME(self, ddns_fqdn):
    host, ip4, ip6 = ddns_fqdn, '1.2.3.4', '::42'
    # make sure the host is there
    update_ns(host, 'A', ip4, action='add')
    update_ns(host, 'AAAA', ip6, action='add')
    delete(host, 'A')
    # make sure it is gone
    with pytest.raises(NoAnswer):
        query_ns(host, 'A')
    delete(host, 'AAAA')
    # make sure it is gone
    with pytest.raises(NXDOMAIN):
        query_ns(host, 'AAAA')