Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\print-bk\vendor\theseer\tokenizer\tests\TokenTest.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print-bk\vendor\theseer\tokenizer\tests\TokenTest.php on line 6