magento-test/app/code/Magento/MediaGallerySynchronization/etc/queue_consumer.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-message-queue:etc/consumer.xsd">
    <consumer name="media.gallery.synchronization" queue="media.gallery.synchronization"
              handler="Magento\MediaGallerySynchronization\Model\Consume::execute"/>
</config>