magento-test/app/code/Magento/SalesRule/Test/Mftf/ActionGroup/SelectRetailerCustomerGroupActionGroup.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="SelectRetailerCustomerGroupActionGroup">
        <annotations>
            <description>Selects 'Retailer' from the 'Customer Groups' list (Magento 2 B2B). PLEASE NOTE: The value is Hardcoded.</description>
        </annotations>

        <!-- This actionGroup was created to be merged from B2B. Retailer Customer Group -->
        <selectOption selector="{{AdminCartPriceRulesFormSection.customerGroups}}" userInput="Retailer" stepKey="selectRetailerCustomerGroup"/>
    </actionGroup>
</actionGroups>