magento-test/app/code/Magento/EncryptionKey/Test/Mftf/Section/AdminEncryptionKeyChangeFormSection.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<sections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="urn:magento:mftf:Page/etc/SectionObject.xsd">
    <section name="AdminEncryptionKeyChangeFormSection">
        <element name="autoGenerate" type="select" selector="#generate_random"/>
        <element name="cryptKey" type="input" selector="input#crypt_key"/>
        <element name="changeEncryptionKey" type="button" selector=".page-actions-buttons #save" timeout="10"/>
    </section>
</sections>