diff --git a/CLAUDE.md b/CLAUDE.md
index 1fd2527..ab66f22 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -236,5 +236,6 @@ The project uses strict mypy configuration with `disallow_untyped_defs=true`. Ru
 - Do not include unrelated files
 - Use descriptive commit messages
 - Group related files together (e.g., tests with the code they test)
+- **Always run tests before committing**: `docker compose exec -T app pytest tests/ -v --tb=short`. If Docker is not running or not available, warn the user that tests could not be verified before committing.
 - **After each meaningful change, ask the user if they want to commit and push the changes**