Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/nixap/ddd.nixap.space/vendor/league/oauth1-client/tests/RsaClientCredentialsTest.php:10 Stack trace: #0 {main} thrown in /home/nixap/ddd.nixap.space/vendor/league/oauth1-client/tests/RsaClientCredentialsTest.php on line 10