magento-test/app/code/Magento/Captcha/Test/Mftf/Data/CaptchaData.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="WrongCaptcha">
        <data key="value" unique="suffix">WrongCAPTCHA</data>
    </entity>

    <!-- This CAPTCHA will only work if "StorefrontCustomerCaptchaLength3ConfigData" and "StorefrontCustomerCaptchaSymbols1ConfigData" config is set. -->
    <entity name="PreconfiguredCaptcha">
        <data key="value">111</data>
    </entity>
</entities>