@Test
public void testSerializationSelf() throws Exception {

    PauselessHashMap<String, String> hm = new PauselessHashMap<String, String>();
    hm.put("key", "value");
      SerializationTest.verifySelf(hm);
    //  regression for HARMONY-1583
    hm.put(null, "null");
      SerializationTest.verifySelf(hm);
}