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