Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/quitpathshareaco/public_html/New/vendor/drupal/core/tests/Drupal/Tests/Component/Diff/DiffOpOutputBuilderTest.php:23 Stack trace: #0 {main} thrown in /home/quitpathshareaco/public_html/New/vendor/drupal/core/tests/Drupal/Tests/Component/Diff/DiffOpOutputBuilderTest.php on line 23