Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp73\htdocs\MonitoresCIE_C\vendor\phar-io\manifest\tests\xml\AuthorElementCollectionTest.php:7 Stack trace: #0 {main} thrown in C:\xampp73\htdocs\MonitoresCIE_C\vendor\phar-io\manifest\tests\xml\AuthorElementCollectionTest.php on line 7