@Override
  protected List<DateTimeField> invalidFields() {

    List<DateTimeField> list = new ArrayList<>(Arrays.<DateTimeField> asList(ChronoField.values()));
    list.removeAll(validFields());
    list.add(JulianDayField.JULIAN_DAY);
    list.add(JulianDayField.MODIFIED_JULIAN_DAY);
    list.add(JulianDayField.RATA_DIE);
    return list;
  }

  @Test(groups = { "tck" }