There were 2 PHPUnit test runner warnings:
1) Class NamespaceFullyQualifiedTest cannot be found in /mnt/Dev/@williamdes/@forked-repos/closure/tests/NamespaceFullyQualifiedTest.php
2) Class NamespaceGroupTest cannot be found in /mnt/Dev/@williamdes/@forked-repos/closure/tests/NamespaceGroupTest.php
Fixes
Found after allowing phpunit 10
Follow up of #139