diff --git a/README.md b/README.md
index 67e3024..0602c76 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,10 @@ Run one-off tasks with (add `--key-file` or other options as necessary):
 
     ansible -m ping 'server-*'
 
-Run a playbook with:
+Run a playbook in check mode with:
+
+    ansible-playbook setup.yml -l 'server-*' -CD
+
+If everything seems OK, run:
 
     ansible-playbook setup.yml -l 'server-*'