assertFalse(getMap().containsKey(k1()));
    assertFalse(getMap().containsValue(v0()));
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
  @CollectionSize.Require(ONE)
  public void testForcePutNullKeyPresent() {
    initMapWithNullKey();

    getMap().forcePut(null, v1());

    expectContents(mapEntry((K) null, v1()));

    assertFalse(getMap().containsValue(v0()));