Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/oyaagyug/public_html/vendor/league/oauth1-client/tests/ClientCredentialsTest.php:9
Stack trace:
#0 {main}
thrown in /home/oyaagyug/public_html/vendor/league/oauth1-client/tests/ClientCredentialsTest.php on line 9