Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\GAPCNPJ\tests\Unit\Validators\CnpjValidatorTest.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\GAPCNPJ\tests\Unit\Validators\CnpjValidatorTest.php on line 16