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

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

var config = {
    config: {
        mixins: {
            'Magento_Customer/js/customer-data': {
                'Magento_Persistent/js/view/customer-data-mixin': true
            }
        }
    }
};