Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /var/www/html/composer/vendor/spipu/html2pdf/Tests/Parsing/HtmlLexerTest.php:21 Stack trace: #0 {main} thrown in /var/www/html/composer/vendor/spipu/html2pdf/Tests/Parsing/HtmlLexerTest.php on line 21