/usr/lib/systemd/tests/testdata/test-path/ is in systemd-tests 237-3ubuntu10.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/systemd/tests/testdata/test-path/basic.target
/usr/lib/systemd/tests/testdata/test-path/path-changed.path
/usr/lib/systemd/tests/testdata/test-path/path-changed.service
/usr/lib/systemd/tests/testdata/test-path/path-directorynotempty.path
/usr/lib/systemd/tests/testdata/test-path/path-directorynotempty.service
/usr/lib/systemd/tests/testdata/test-path/path-exists.path
/usr/lib/systemd/tests/testdata/test-path/path-exists.service
/usr/lib/systemd/tests/testdata/test-path/path-existsglob.path
/usr/lib/systemd/tests/testdata/test-path/path-existsglob.service
/usr/lib/systemd/tests/testdata/test-path/path-makedirectory.path
/usr/lib/systemd/tests/testdata/test-path/path-makedirectory.service
/usr/lib/systemd/tests/testdata/test-path/path-modified.path
/usr/lib/systemd/tests/testdata/test-path/path-modified.service
/usr/lib/systemd/tests/testdata/test-path/path-mycustomunit.service
/usr/lib/systemd/tests/testdata/test-path/path-service.service
/usr/lib/systemd/tests/testdata/test-path/path-unit.path
/usr/lib/systemd/tests/testdata/test-path/paths.target
/usr/lib/systemd/tests/testdata/test-path/sysinit.target