Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/noct-c/www/tanakahashi/vendor/symfony/var-dumper/Tests/Dumper/HtmlDumperTest.php:21
Stack trace:
#0 {main}
thrown in /home/noct-c/www/tanakahashi/vendor/symfony/var-dumper/Tests/Dumper/HtmlDumperTest.php on line 21