public void test_plusWeeks_minimum() {

    LocalDateTime t = createDateMidnight(Year.MIN_YEAR, 1, 8).plusWeeks(-1);
    check(t, Year.MIN_YEAR, 1, 1, 0, 0, 0, 0);
  }

  @Test(expectedExceptions = DateTimeException.class, groups = { "tck" }