magento-test/app/code/Magento/Tax/Test/Mftf/ActionGroup/StorefrontAssertOrderReviewSummaryWithTaxActionGroup.xml

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

<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
    <actionGroup name="StorefrontAssertOrderReviewSummaryWithTaxActionGroup" extends="VerifyCheckoutPaymentOrderSummaryActionGroup">
        <annotations>
            <description>Validates that the provided Subtotal, Shipping Total and Summary Total prices are present and correct on the Storefront Checkout page.</description>
        </annotations>
        <arguments>
            <argument name="orderSummaryTax" type="string"/>
        </arguments>
        <see selector="{{StorefrontOrderReviewSection.taxCost}}" userInput="{{orderSummaryTax}}" stepKey="seeCorrectTax" after="seeCorrectOrderTotal"/>
    </actionGroup>
</actionGroups>