Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\kalimark\vendor\symfony\var-dumper\Tests\Caster\ReflectionCasterTest.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\kalimark\vendor\symfony\var-dumper\Tests\Caster\ReflectionCasterTest.php on line 23