magento-test/app/code/Magento/Config/Test/Mftf/Metadata/SystemConfigCountriesMeta.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->
<operations xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:noNamespaceSchemaLocation="urn:magento:mftf:DataGenerator/etc/dataOperation.xsd">
    <operation name="AdminAccountCountryOptionConfig" dataType="admin_account_country_options_config" type="create" auth="adminFormKey" url="/admin/system_config/save/section/general/" method="POST">
        <object key="groups" dataType="admin_account_country_options_config">
            <object key="country" dataType="admin_account_country_options_config">
                 <object key="fields" dataType="admin_account_country_options_config">
                    <object key="allow" dataType="admin_account_country_options_value">
                        <field key="value">string</field>
                    </object>
                 </object>
            </object>
        </object>
    </operation>

    <operation name="DefaultAdminAccountCountryOptionConfig" dataType="default_admin_account_country_options_config" type="create" auth="adminFormKey" url="/admin/system_config/save/section/general/" method="POST">
        <object key="groups" dataType="default_admin_account_country_options_config">
            <object key="country" dataType="default_admin_account_country_options_config">
                <object key="fields" dataType="default_admin_account_country_options_config">
                    <object key="allow" dataType="default_admin_account_country_options_config">
                        <object key="inherit" dataType="checkoutTotalFlagZero">
                            <field key="value">string</field>
                        </object>
                    </object>
                </object>
            </object>
        </object>
    </operation>

    <operation name="DefaultAdminAccountCountryOptionConfigDefaultWebsite" dataType="default_admin_account_country_options_config_for_default_website" type="create" auth="adminFormKey" url="/admin/system_config/save/section/general/website/1/" method="POST">
        <object key="groups" dataType="default_admin_account_country_options_config_for_default_website">
            <object key="country" dataType="default_admin_account_country_options_config_for_default_website">
                <object key="fields" dataType="default_admin_account_country_options_config_for_default_website">
                    <object key="allow" dataType="default_admin_account_country_options_config_for_default_website">
                        <object key="inherit" dataType="checkoutTotalFlagZero">
                            <field key="value">string</field>
                        </object>
                    </object>
                </object>
            </object>
        </object>
    </operation>
</operations>