Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /var/www/legtux.org/users/weboconsulting/www/vendor/willdurand/negotiation/tests/Negotiation/Tests/TestCase.php:7 Stack trace: #0 {main} thrown in /var/www/legtux.org/users/weboconsulting/www/vendor/willdurand/negotiation/tests/Negotiation/Tests/TestCase.php on line 7