@Override
 protected NotificationRegistry createNotificationRegistry(
     ZonedDateTimeProvider zonedDateTimeProvider) {
   cassandra = CassandraCluster.create(new CassandraNotificationRegistryModule());
   return new CassandraNotificationRegistry(
       zonedDateTimeProvider, new CassandraNotificationRegistryDAO(cassandra.getConf()));
 }
 @After
 public void tearDown() {
   cassandra.clearAllTables();
 }