Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/app3/public_html/service/app/Helpers/html2text/vendor/phpunit/php-timer/tests/TimerTest.php:18 Stack trace: #0 {main} thrown in /home/app3/public_html/service/app/Helpers/html2text/vendor/phpunit/php-timer/tests/TimerTest.php on line 18