public void test_plusHours_zero() {

    OffsetTime base = OffsetTime.of(11, 30, 59, OFFSET_PONE);
    OffsetTime test = base.plusHours(0);
    assertEquals(test, base);
  }

  // -----------------------------------------------------------------------
  // plusMinutes()
  // -----------------------------------------------------------------------
  @Test(groups = { "tck" }