Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in D:\xampp7\htdocs\www\nbkm\show_pe\vendor\phpunit\php-timer\tests\TimerTest.php:17 Stack trace: #0 {main} thrown in D:\xampp7\htdocs\www\nbkm\show_pe\vendor\phpunit\php-timer\tests\TimerTest.php on line 17