diff --git a/doc/sandbox.mdwn b/doc/sandbox.mdwn
index a9d72086e..84175d68c 100644
--- a/doc/sandbox.mdwn
+++ b/doc/sandbox.mdwn
@@ -42,6 +42,8 @@ Exactly my point!
 
 Test..
 
+A [[nonexistingpage]]
+
 There are Polish diacritical characters: ą, ć, ę, ł, ń, ó, ś, ż, ź.
 
 # Header