diff --git a/tox.ini b/tox.ini
index 09f0d9f99..c53bd2a44 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,8 @@
 # test suite on all supported python versions. To use it, "pip install tox"
 # and then run "tox" from this directory.
 
-# Map Python versions in GitHub Actions to tox environments to run.
+# Map Python versions in GitHub Actions to tox environments to run, for use by
+# the tox-gh-actions package.
 [gh-actions]
 python =
     2.7: py27-coverage,codechecks