diff --git a/tox.ini b/tox.ini
index b02e491fb..055f1e572 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ envlist =
     py38-{test,cov,flake8}
     docs
 
-# exhaustive list
+# The exhaustive list of environments is:
 # py{27,35,36,37,38}-{test,cov,flake8}, docs
 
 [gh-actions:env]