magento-test/app/code/Magento/Ui/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>
        <dev>
            <js>
                <session_storage_logging>0</session_storage_logging>
                <session_storage_key>collected_errors</session_storage_key>
            </js>
        </dev>
        <cms>
            <wysiwyg>
                <editor_version>mage/adminhtml/wysiwyg/tiny_mce/tinymce5Adapter</editor_version>
            </wysiwyg>
        </cms>
    </default>
</config>