Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/w/vendor/jeroen/file-fetcher/tests/Unit/StubFileFetcherTest.php:16 Stack trace: #0 {main} thrown in /var/www/html/w/vendor/jeroen/file-fetcher/tests/Unit/StubFileFetcherTest.php on line 16