Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home2/circuitos/public_html/circuitos-dev/vendor/sebastian/diff/tests/LongestCommonSubsequenceTest.php:18 Stack trace: #0 {main} thrown in /home2/circuitos/public_html/circuitos-dev/vendor/sebastian/diff/tests/LongestCommonSubsequenceTest.php on line 18