magento-test/app/code/Magento/Theme/view/adminhtml/templates/title.phtml

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

/**
 * @var $block \Magento\Theme\Block\Html\Title
 */
$titleIdHtml = ($block->getTitleId()) ? ' id="' . $block->escapeHtmlAttr($block->getTitleId()) . '"' : '';
$titleClass = ($block->getTitleClass()) ? ' ' . $block->getTitleClass() : '';
$title = $block->getPageTitle();
?>

<div class="page-title-wrapper<?= $block->escapeHtmlAttr($titleClass) ?>">
    <h1 class="page-title"<?= /* @noEscape */ $titleIdHtml ?>><?= $block->escapeHtml($title) ?></h1>
    <?= $block->getChildHtml() ?>
</div>