/usr/lib/python3/dist-packages/setuptools/tests/ is in python3-setuptools 3.3-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/setuptools/tests/__init__.py
/usr/lib/python3/dist-packages/setuptools/tests/doctest.py
/usr/lib/python3/dist-packages/setuptools/tests/environment.py
/usr/lib/python3/dist-packages/setuptools/tests/py26compat.py
/usr/lib/python3/dist-packages/setuptools/tests/script-with-bom.py
/usr/lib/python3/dist-packages/setuptools/tests/server.py
/usr/lib/python3/dist-packages/setuptools/tests/test_bdist_egg.py
/usr/lib/python3/dist-packages/setuptools/tests/test_build_ext.py
/usr/lib/python3/dist-packages/setuptools/tests/test_develop.py
/usr/lib/python3/dist-packages/setuptools/tests/test_dist_info.py
/usr/lib/python3/dist-packages/setuptools/tests/test_easy_install.py
/usr/lib/python3/dist-packages/setuptools/tests/test_egg_info.py
/usr/lib/python3/dist-packages/setuptools/tests/test_find_packages.py
/usr/lib/python3/dist-packages/setuptools/tests/test_markerlib.py
/usr/lib/python3/dist-packages/setuptools/tests/test_packageindex.py
/usr/lib/python3/dist-packages/setuptools/tests/test_resources.py
/usr/lib/python3/dist-packages/setuptools/tests/test_sandbox.py
/usr/lib/python3/dist-packages/setuptools/tests/test_sdist.py
/usr/lib/python3/dist-packages/setuptools/tests/test_svn.py
/usr/lib/python3/dist-packages/setuptools/tests/test_test.py
/usr/lib/python3/dist-packages/setuptools/tests/test_upload_docs.py