Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/custom/public_html/katiekarr/vendor/srmklive/paypal/tests/Unit/Client/InvoicesSearchTest.php:11 Stack trace: #0 {main} thrown in /home/custom/public_html/katiekarr/vendor/srmklive/paypal/tests/Unit/Client/InvoicesSearchTest.php on line 11