Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\Apache24_x64\htdocs\ipad\vendor\sebastian\recursion-context\tests\ContextTest.php:18 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\sebastian\recursion-context\tests\ContextTest.php on line 18