Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\Apache24\htdocs\vendor.old\symfony\debug\Tests\FatalErrorHandler\UndefinedMethodFatalErrorHandlerTest.php:18 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old\symfony\debug\Tests\FatalErrorHandler\UndefinedMethodFatalErrorHandlerTest.php on line 18