diff --git a/tox.ini b/tox.ini
index f0574ef94b0b..ed9a1544f012 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,9 +1,9 @@
 [tox]
 minversion = 3.1.1
 envlist = py{27,36,37},functional,pep8
-# Automatic envs (pyXX) will use the python version appropriate to that
-# env and ignore basepython inherited from [testenv]. That's what we
-# want, and we don't need to be warned about it.
+# Automatic envs (pyXX) will only use the python version appropriate to that
+# env and ignore basepython inherited from [testenv] if we set
+# ignore_basepython_conflict.
 ignore_basepython_conflict = True
 
 [testenv]