magento-test/app/code/Magento/Backup/etc/di.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:ObjectManager/etc/config.xsd">
    <type name="Magento\Framework\Backup\Db\BackupFactory">
        <arguments>
            <argument name="backupInstanceName" xsi:type="string">Magento\Backup\Model\Backup</argument>
            <argument name="backupDbInstanceName" xsi:type="string">Magento\Backup\Model\Db</argument>
        </arguments>
    </type>
    <type name="Magento\Backup\Model\ResourceModel\Helper">
        <arguments>
            <argument name="modulePrefix" xsi:type="string">backup</argument>
        </arguments>
    </type>
</config>