Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/custom/public_html/katiekarr/vendor/srmklive/paypal/tests/Unit/Adapter/WebHooksTest.php:10 Stack trace: #0 {main} thrown in /home/custom/public_html/katiekarr/vendor/srmklive/paypal/tests/Unit/Adapter/WebHooksTest.php on line 10