Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\soli\vendor\spomky-labs\pki-framework\tests\X501\Unit\StringPrep\TranscodeStepTest.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\soli\vendor\spomky-labs\pki-framework\tests\X501\Unit\StringPrep\TranscodeStepTest.php on line 16