Fatal error: Uncaught Error: Class 'Composer\Installers\Test\TestCase' not found in /home/www/farandole/vendor/composer/installers/tests/Composer/Installers/Test/GravInstallerTest.php:7 Stack trace: #0 {main} thrown in /home/www/farandole/vendor/composer/installers/tests/Composer/Installers/Test/GravInstallerTest.php on line 7