Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /opt/lampp/htdocs/us/vendor/psy/psysh/test/Formatter/DocblockFormatterTest.php:16 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/us/vendor/psy/psysh/test/Formatter/DocblockFormatterTest.php on line 16