@Test
  public void testNoExtensibility() throws Exception {
    setupSerializer(false, false, "org.apache.geode.pdx.AutoSerializableJUnitTest.BigHolder");

    doExtensible("using standard serialization of Big*");
  }
A serializable with a writeReplace method should use standard serialization.
geode-core/src/integrationTest/java/org/apache/geode/pdx/AutoSerializableJUnitTest.java