assertThrows(UnsupportedOperationException.class, () -> getMap().remove(k0(), v0()));
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemove_unsupportedAbsent() {
    try {
      assertFalse(getMap().remove(k0(), v3()));
    } catch (UnsupportedOperationException tolerated) {
      // since the operation would be a no-op, the exception is not required
    }