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