Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\cms-propay\vendor\rmunate\spell-number\test\SpellNumberTest.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\cms-propay\vendor\rmunate\spell-number\test\SpellNumberTest.php on line 6