Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\admin\vendor\league\oauth1-client\tests\XingServerTest.php:12
Stack trace:
#0 {main}
thrown in C:\xampp\htdocs\admin\vendor\league\oauth1-client\tests\XingServerTest.php on line 12