Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\webservices\2911inovarservice-order\vendor\mike42\gfx-php\test\integration\SmallFileTest.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\webservices\2911inovarservice-order\vendor\mike42\gfx-php\test\integration\SmallFileTest.php on line 6