@Test
public void testGetBucketVersions() {

    testActor.tell(new ActionRegistry.Messages.UpdateActions(Lists.newArrayList(buckets),
            Collections.emptyList()), ActorRef.noSender());
    final String bucketVersions = mxBean.getBucketVersions();
    Assert.assertTrue(bucketVersions.contains(testActor.provider().getDefaultAddress().toString()));
}