Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/maske/public_html/assurance/vendor/symfony/http-foundation/Tests/HeaderBagTest.php:17 Stack trace: #0 {main} thrown in /home/maske/public_html/assurance/vendor/symfony/http-foundation/Tests/HeaderBagTest.php on line 17