diff --git a/doc/sandbox.mdwn b/doc/sandbox.mdwn
index 1adbc972c..a0c20fff4 100644
--- a/doc/sandbox.mdwn
+++ b/doc/sandbox.mdwn
@@ -40,6 +40,7 @@ Numbered list
   3. baz
    4. qux
     5. quux
+     6. wibble
 
 Bulleted list