Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\xampp\htdocs\SSWPOS\vendor\google\auth\tests\Credentials\InsecureCredentialsTest.php:27 Stack trace: #0 {main} thrown in D:\xampp\htdocs\SSWPOS\vendor\google\auth\tests\Credentials\InsecureCredentialsTest.php on line 27