Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\Apache24_x64\htdocs\ipad\vendor\phar-io\manifest\tests\xml\AuthorElementCollectionTest.php:7 Stack trace: #0 {main} thrown in C:\Apache24_x64\htdocs\ipad\vendor\phar-io\manifest\tests\xml\AuthorElementCollectionTest.php on line 7