magento-test/app/code/Magento/Directory/view/frontend/requirejs-config.js

/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

var config = {
    map: {
        '*': {
            directoryRegionUpdater: 'Magento_Directory/js/region-updater'
        }
    }
};