Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/bucereo/my_project_name/vendor/Html2Pdf/src/Tests/ExamplesTest.php:18 Stack trace: #0 {main} thrown in /home/bucereo/my_project_name/vendor/Html2Pdf/src/Tests/ExamplesTest.php on line 18