magento-test/app/code/Magento/Multishipping/Test/Mftf/Data/MultishippingSalesRuleData.xml

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

<entities xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="urn:magento:mftf:DataGenerator/etc/dataProfileSchema.xsd">
    <entity name="CartPriceRuleConditionForSubtotalForMultiShipping" extends="CartPriceRuleConditionAppliedForSubtotal">
        <data key="apply">Percent of product price discount</data>
        <data key="customerGroups">'NOT LOGGED IN', 'General', 'Wholesale', 'Retailer'</data>
        <data key="subtotal">50</data>
        <data key="apply_to_shipping">1</data>
        <data key="simple_free_shipping">For matching items only</data>
        <data key="condition1">Subtotal</data>
        <data key="condition2">Shipping Method</data>
        <data key="rule1">equals or greater than</data>
        <data key="shippingMethod">[flatrate] Fixed</data>
        <data key="ruleToChange1">is</data>
   </entity>
</entities>