Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in E:\xampp\htdocs\key1\vendor\symfony\routing\Tests\Matcher\Dumper\DumperCollectionTest.php:17 Stack trace: #0 {main} thrown in E:\xampp\htdocs\key1\vendor\symfony\routing\Tests\Matcher\Dumper\DumperCollectionTest.php on line 17