diff --git a/.readthedocs.yml b/.readthedocs.yml
index 66d4b98f..618d642d 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -9,7 +9,8 @@ build:
       # Avoid `git` treating the directory is dirty due to RTD changes.
       # ref: https://docs.readthedocs.io/en/stable/build-customization.html#avoid-having-a-dirty-git-index
       - git update-index --assume-unchanged continuous_integration/environment-doc.yml docs/conf.py
-      - git status
+      # If we missed any, error and list the changed files.
+      - git diff --stat --exit-code
 
 sphinx:
   configuration: docs/conf.py