diff --git a/Python3.md b/Python3.md
index d871e62..5b3911e 100644
--- a/Python3.md
+++ b/Python3.md
@@ -10,7 +10,7 @@
 
 We use [tox](https://tox.readthedocs.io/en/latest/) to standardize environments across developers and CI.
 
-1. Install tox (globally, probably).
+1. Install tox (globally, probably; consider [pipx](https://pipxproject.github.io/pipx/)).
 2. In your Tahoe-LAFS working copy, run `tox -e py36 --notest` to bootstrap the `py36` virtualenv.
 3. Activate the environment with `source .tox/py36/bin/activate` or equivalent and run `trial allmydata.test.test_python3` as a smoke test.
 4. `deactivate` the virtualenv (or switch shells) and run `tox -e py36` to exercise the whole suite.