Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\laragon\www\loyal\vendor\phpdocumentor\graphviz\tests\phpDocumentor\GraphViz\Test\AttributeTest.php:22 Stack trace: #0 {main} thrown in D:\laragon\www\loyal\vendor\phpdocumentor\graphviz\tests\phpDocumentor\GraphViz\Test\AttributeTest.php on line 22