/usr/lib/python3/dist-packages/twisted/python/test/ is in python3-twisted-experimental 13.2.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/twisted/python/test/__init__.py
/usr/lib/python3/dist-packages/twisted/python/test/deprecatedattributes.py
/usr/lib/python3/dist-packages/twisted/python/test/modules_helpers.py
/usr/lib/python3/dist-packages/twisted/python/test/test_components.py
/usr/lib/python3/dist-packages/twisted/python/test/test_constants.py
/usr/lib/python3/dist-packages/twisted/python/test/test_deprecate.py
/usr/lib/python3/dist-packages/twisted/python/test/test_reflectpy3.py
/usr/lib/python3/dist-packages/twisted/python/test/test_runtime.py
/usr/lib/python3/dist-packages/twisted/python/test/test_util.py
/usr/lib/python3/dist-packages/twisted/python/test/test_versions.py