Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/app/htdocs/lidia/vendor/symfony/http-foundation/Tests/File/MimeType/MimeTypeTest.php:21 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/symfony/http-foundation/Tests/File/MimeType/MimeTypeTest.php on line 21