magento-test/app/code/Magento/Cms/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>
        <web>
            <default>
                <cms_home_page>home</cms_home_page>
                <cms_no_route>no-route</cms_no_route>
                <cms_no_cookies>enable-cookies</cms_no_cookies>
                <front>cms</front>
                <no_route>cms/noroute/index</no_route>
                <show_cms_breadcrumbs>1</show_cms_breadcrumbs>
            </default>
            <default_layouts>
                <default_cms_layout>1column</default_cms_layout>
            </default_layouts>
        </web>
        <cms>
            <wysiwyg>
                <enabled>enabled</enabled>
                <editor>mage/adminhtml/wysiwyg/tiny_mce/tinymce5Adapter</editor>
                <force_valid>0</force_valid>
            </wysiwyg>
        </cms>
        <system>
            <media_storage_configuration>
                <allowed_resources>
                    <media_gallery_image_folders>
                        <wysiwyg_image_folder>wysiwyg</wysiwyg_image_folder>
                    </media_gallery_image_folders>
                    <preview_folder>.thumbs</preview_folder>
                </allowed_resources>
            </media_storage_configuration>
        </system>
    </default>
</config>