/usr/lib/python3/dist-packages/postgresql/test/ is in python3-postgresql 1.0.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/postgresql/test/__init__.py
/usr/lib/python3/dist-packages/postgresql/test/cursor_integrity.py
/usr/lib/python3/dist-packages/postgresql/test/perf_copy_io.py
/usr/lib/python3/dist-packages/postgresql/test/perf_query_io.py
/usr/lib/python3/dist-packages/postgresql/test/support.py
/usr/lib/python3/dist-packages/postgresql/test/test_alock.py
/usr/lib/python3/dist-packages/postgresql/test/test_bytea_codec.py
/usr/lib/python3/dist-packages/postgresql/test/test_cluster.py
/usr/lib/python3/dist-packages/postgresql/test/test_configfile.py
/usr/lib/python3/dist-packages/postgresql/test/test_connect.py
/usr/lib/python3/dist-packages/postgresql/test/test_copyman.py
/usr/lib/python3/dist-packages/postgresql/test/test_dbapi20.py
/usr/lib/python3/dist-packages/postgresql/test/test_driver.py
/usr/lib/python3/dist-packages/postgresql/test/test_exceptions.py
/usr/lib/python3/dist-packages/postgresql/test/test_installation.py
/usr/lib/python3/dist-packages/postgresql/test/test_iri.py
/usr/lib/python3/dist-packages/postgresql/test/test_lib.py
/usr/lib/python3/dist-packages/postgresql/test/test_notifyman.py
/usr/lib/python3/dist-packages/postgresql/test/test_optimized.py
/usr/lib/python3/dist-packages/postgresql/test/test_pgpassfile.py
/usr/lib/python3/dist-packages/postgresql/test/test_protocol.py
/usr/lib/python3/dist-packages/postgresql/test/test_python.py
/usr/lib/python3/dist-packages/postgresql/test/test_ssl_connect.py
/usr/lib/python3/dist-packages/postgresql/test/test_string.py
/usr/lib/python3/dist-packages/postgresql/test/test_types.py
/usr/lib/python3/dist-packages/postgresql/test/testall.py