Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/naturhh9/public_html/backup3/vendor/sabberworm/php-css-parser/tests/RuleSet/LenientParsingTest.php:21
Stack trace:
#0 {main}
  thrown in /home/naturhh9/public_html/backup3/vendor/sabberworm/php-css-parser/tests/RuleSet/LenientParsingTest.php on line 21