Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/devypfrfhn/gasm.devyp.fr/vendor/sebastian/diff/tests/ChunkTest.php:18 Stack trace: #0 {main} thrown in /home/devypfrfhn/gasm.devyp.fr/vendor/sebastian/diff/tests/ChunkTest.php on line 18