magento-test/app/code/Magento/Customer/Test/Mftf/Section/StorefrontCustomerAccountMainSection.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="StorefrontCustomerAccountMainSection">
        <element name="pageTitle" type="text" selector="#maincontent .column.main [data-ui-id='page-title-wrapper']" />
        <element name="messageByType" type="block" selector="#maincontent .message-{{messageType}}" parameterized="true" />
        <element name="alertMessage" type="text" selector=".page.messages [role=alert]"/>
    </section>
</sections>