magento-test/app/code/Magento/Sales/Test/Mftf/ActionGroup/AdminCreateInvoiceAndCreditMemoActionGroup.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="AdminCreateInvoiceAndCreditMemoActionGroup" extends="AdminCreateInvoiceActionGroup">
        <click selector="{{AdminOrderDetailsMainActionsSection.creditMemo}}" stepKey="pushButtonCreditMemo" after="seeMessage"/>
        <waitForPageLoad stepKey="waitForLoadingCreditMemoPage" after="pushButtonCreditMemo"/>
        <scrollTo selector="{{AdminCreditMemoTotalSection.submitRefundOffline}}" stepKey="scrollToBottom" after="waitForLoadingCreditMemoPage"/>
        <click selector="{{AdminCreditMemoTotalSection.submitRefundOffline}}" stepKey="clickSubmitRefund" after="scrollToBottom"/>
        <waitForPageLoad stepKey="waitForMainOrderPageLoad" after="clickSubmitRefund" time="60"/>
        <see userInput="You created the credit memo." stepKey="seeCreditMemoMessage" after="waitForMainOrderPageLoad"/>
    </actionGroup>
</actionGroups>