Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Apache24\www\qilu\back-end\vendor\mews\captcha\tests\Captcha\CaptchaServiceProviderTest.php:7 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu\back-end\vendor\mews\captcha\tests\Captcha\CaptchaServiceProviderTest.php on line 7