Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/itwerx/public_html/vendor/oomphinc/composer-installers-extender/tests/src/Installers/InstallerTest.php:12
Stack trace:
#0 {main}
thrown in /home/itwerx/public_html/vendor/oomphinc/composer-installers-extender/tests/src/Installers/InstallerTest.php on line 12