magento-test/app/code/Magento/Downloadable/etc/config.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:module:Magento_Store:etc/config.xsd">
    <default>
        <catalog>
            <downloadable>
                <order_item_status>9</order_item_status>
                <downloads_number>0</downloads_number>
                <shareable>0</shareable>
                <samples_title>Samples</samples_title>
                <links_title>Links</links_title>
                <links_target_new_window>1</links_target_new_window>
                <content_disposition>inline</content_disposition>
                <disable_guest_checkout>1</disable_guest_checkout>
            </downloadable>
        </catalog>
    </default>
</config>