magento-test/app/code/Magento/Checkout/Test/Mftf/Section/StorefrontCheckoutPaymentMethodSection.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="StorefrontCheckoutPaymentMethodSection">
        <element name="billingAddress" type="text" selector=".checkout-billing-address"/>
        <element name="checkPaymentMethodByName" type="radio" selector="//div[@id='checkout-payment-method-load']//div[@class='payment-method']//label//span[contains(., '{{methodName}}')]/../..//input" parameterized="true"/>
        <element name="billingAddressSameAsShipping" type="checkbox" selector=".payment-method._active [name='billing-address-same-as-shipping']"/>
        <element name="billingAddressSameAsShippingShared" type="checkbox" selector="#billing-address-same-as-shipping-shared"/>
        <element name="paymentOnAccount" type="radio" selector="#companycredit" deprecated="Use StorefrontCheckoutPaymentSection.paymentOnAccount B2B repository"/>
        <element name="paymentOnAccountLabel" type="text" selector="//span[text()='Payment on Account']" deprecated="Use StorefrontCheckoutPaymentSection.paymentOnAccountLabel in B2B repository"/>
        <element name="purchaseOrderNumber" type="input" selector="#po_number"/>
    </section>
</sections>