Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/szperaczxf/autoresponder/vendor/soundasleep/html2text/tests/Html2TextTest.php:5 Stack trace: #0 {main} thrown in /home/szperaczxf/autoresponder/vendor/soundasleep/html2text/tests/Html2TextTest.php on line 5