Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\batuhansunar\vendor\andrewdalpino\okbloomer\tests\BloomFilterTest.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\batuhansunar\vendor\andrewdalpino\okbloomer\tests\BloomFilterTest.php on line 12