Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /opt/lampp/htdocs/us/vendor/phenx/php-svg-lib/tests/Svg/StyleTest.php:14 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/us/vendor/phenx/php-svg-lib/tests/Svg/StyleTest.php on line 14