Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Application\www\Training\vendor\symfony\var-dumper\Tests\Caster\ReflectionCasterTest.php:22 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\symfony\var-dumper\Tests\Caster\ReflectionCasterTest.php on line 22