diff --git a/doc/sandbox.mdwn b/doc/sandbox.mdwn
index 6570e26fb..d3c66d211 100644
--- a/doc/sandbox.mdwn
+++ b/doc/sandbox.mdwn
@@ -45,6 +45,7 @@ Bulleted list
 * one
   * two
   * two
+    * three
 *one
 *one