"Should not contain null key after unsupported putIfAbsent(null, value)");
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  public void testPutIfAbsent_nullValueUnsupportedAndKeyAbsent() {
    try {
      getMap().putIfAbsent(k3(), null);
      fail("putIfAbsent(key, null) should throw");
    } catch (NullPointerException expected) {
    }
    expectUnchanged();