Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\sites\wasalnah.sabti-h.com\vendor\guzzlehttp\guzzle\tests\Handler\Network\StreamHandlerTest.php:15 Stack trace: #0 {main} thrown in C:\sites\wasalnah.sabti-h.com\vendor\guzzlehttp\guzzle\tests\Handler\Network\StreamHandlerTest.php on line 15