Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /data/htmlwww/laravel-system/vendor/symfony/css-selector/Tests/Parser/ParserTest.php:21 Stack trace: #0 {main} thrown in /data/htmlwww/laravel-system/vendor/symfony/css-selector/Tests/Parser/ParserTest.php on line 21