/usr/share/perl5/Test/Unit/ is in libtest-unit-perl 0.25-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Test/Unit/Assert.pm
/usr/share/perl5/Test/Unit/Assertion/
/usr/share/perl5/Test/Unit/Assertion.pm
/usr/share/perl5/Test/Unit/Assertion/Boolean.pm
/usr/share/perl5/Test/Unit/Assertion/CodeRef.pm
/usr/share/perl5/Test/Unit/Assertion/Exception.pm
/usr/share/perl5/Test/Unit/Assertion/Regexp.pm
/usr/share/perl5/Test/Unit/Debug.pm
/usr/share/perl5/Test/Unit/Decorator.pm
/usr/share/perl5/Test/Unit/Error.pm
/usr/share/perl5/Test/Unit/Exception.pm
/usr/share/perl5/Test/Unit/Failure.pm
/usr/share/perl5/Test/Unit/HarnessUnit.pm
/usr/share/perl5/Test/Unit/Listener.pm
/usr/share/perl5/Test/Unit/Loader.pm
/usr/share/perl5/Test/Unit/Procedural.pm
/usr/share/perl5/Test/Unit/Result.pm
/usr/share/perl5/Test/Unit/Runner/
/usr/share/perl5/Test/Unit/Runner.pm
/usr/share/perl5/Test/Unit/Runner/Terminal.pm
/usr/share/perl5/Test/Unit/Setup.pm
/usr/share/perl5/Test/Unit/Test.pm
/usr/share/perl5/Test/Unit/TestCase.pm
/usr/share/perl5/Test/Unit/TestRunner.pm
/usr/share/perl5/Test/Unit/TestSuite.pm
/usr/share/perl5/Test/Unit/TkTestRunner.pm
/usr/share/perl5/Test/Unit/Tutorial.pm
/usr/share/perl5/Test/Unit/UnitHarness.pm
/usr/share/perl5/Test/Unit/Warning.pm