diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a15c74a6..ac0ff69e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -31,6 +31,7 @@ env:
 jobs:
   test:
     strategy:
+      # https://blog.jaraco.com/efficient-use-of-ci-resources/
       matrix:
         python:
         - "3.8"