Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/app3/public_html/service/app/Http/Controllers/html2text/vendor/sebastian/comparator/tests/ScalarComparatorTest.php:21 Stack trace: #0 {main} thrown in /home/app3/public_html/service/app/Http/Controllers/html2text/vendor/sebastian/comparator/tests/ScalarComparatorTest.php on line 21