Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/noct-c/www/tanakahashi/vendor/sebastian/recursion-context/tests/ContextTest.php:18 Stack trace: #0 {main} thrown in /home/noct-c/www/tanakahashi/vendor/sebastian/recursion-context/tests/ContextTest.php on line 18