magento-test/app/code/Magento/Newsletter/Test/Mftf/Data/NewsletterConfigData.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="SetNeedToConfirmEnabledConfigData">
        <data key="path">newsletter/subscription/confirm</data>
        <data key="value">1</data>
    </entity>
    <entity name="SetNeedToConfirmDisabledConfigData">
        <data key="path">newsletter/subscription/confirm</data>
        <data key="value">0</data>
    </entity>
</entities>