Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /mnt/www/fss/workorder/vendor/sebastian/diff/tests/LongestCommonSubsequenceTest.php:18 Stack trace: #0 {main} thrown in /mnt/www/fss/workorder/vendor/sebastian/diff/tests/LongestCommonSubsequenceTest.php on line 18