Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\AppServ\www\greenhess-storage\vendor\psr\log\Psr\Log\Test\LoggerInterfaceTest.php:15 Stack trace: #0 {main} thrown in C:\AppServ\www\greenhess-storage\vendor\psr\log\Psr\Log\Test\LoggerInterfaceTest.php on line 15