private void disableTable(TableName tableName) throws IOException, InterruptedException {
    try {
      TEST_UTIL.getAdmin().disableTable(tableName);
      TEST_UTIL.waitTableDisabled(tableName, 30000);
    } catch (TableNotEnabledException e) {
      LOG.debug("Table: " + tableName + " already disabled, ignore.");
    }
  }
Take last byte and add one to it.
hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitorCluster.java