Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/cooplafobq/newplanning/vendor/friendsofsymfony/oauth2-php/tests/ExtraHeadersTest.php:11 Stack trace: #0 {main} thrown in /home/cooplafobq/newplanning/vendor/friendsofsymfony/oauth2-php/tests/ExtraHeadersTest.php on line 11