Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in I:\www\pvcUtils\vendor\phar-io\manifest\tests\values\RequirementCollectionTest.php:23 Stack trace: #0 {main} thrown in I:\www\pvcUtils\vendor\phar-io\manifest\tests\values\RequirementCollectionTest.php on line 23