Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/rifafabricadarif/public_html/vendor/mercadopago/dx-php/tests/resources/PreferenceTest.php:7 Stack trace: #0 {main} thrown in /home/rifafabricadarif/public_html/vendor/mercadopago/dx-php/tests/resources/PreferenceTest.php on line 7