Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\Apache24\htdocs\cms_upgrade\vendor\commerceguys\addressing\tests\UpdateHelperTest.php:11 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\commerceguys\addressing\tests\UpdateHelperTest.php on line 11