Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /var/www/drupal/sites/energiatalgud/vendor/stack/builder/tests/unit/Stack/BuilderTest.php:13 Stack trace: #0 {main} thrown in /var/www/drupal/sites/energiatalgud/vendor/stack/builder/tests/unit/Stack/BuilderTest.php on line 13