magento-test/app/code/Magento/ProductAlert/etc/communication.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Communication/etc/communication.xsd">
    <topic name="product_alert" request="Magento\AsynchronousOperations\Api\Data\OperationInterface">
        <handler name="productAlert" type="Magento\ProductAlert\Model\Mailing\Consumer" method="process"/>
    </topic>
</config>