Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/keshavvps/public_html/keshav/KG2/Shir/vendor/league/oauth1-client/tests/XingServerTest.php:12 Stack trace: #0 {main} thrown in /home/keshavvps/public_html/keshav/KG2/Shir/vendor/league/oauth1-client/tests/XingServerTest.php on line 12