Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/users/00/3c/21/home/www/vendor/laravolt/avatar/tests/InitialsGeneratorTest.php:6 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/laravolt/avatar/tests/InitialsGeneratorTest.php on line 6