Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /home/melozbco/public_html/vendor/klarna/kco_rest/tests/Unit/Transport/ResponseValidatorTest.php:27 Stack trace: #0 {main} thrown in /home/melozbco/public_html/vendor/klarna/kco_rest/tests/Unit/Transport/ResponseValidatorTest.php on line 27