Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/nmuffmat/site-heliconia/vendor/seld/signal-handler/tests/SignalHandlerTest.php:8 Stack trace: #0 {main} thrown in /home/nmuffmat/site-heliconia/vendor/seld/signal-handler/tests/SignalHandlerTest.php on line 8