diff --git a/editions/tw5.com/tiddlers/demonstrations/SampleTabFour.tid b/editions/tw5.com/tiddlers/demonstrations/SampleTabFour.tid
index fe57544f4..87c01e931 100644
--- a/editions/tw5.com/tiddlers/demonstrations/SampleTabFour.tid
+++ b/editions/tw5.com/tiddlers/demonstrations/SampleTabFour.tid
@@ -3,6 +3,7 @@ modified: 20150221211613000
 title: SampleTabFour
 tags: sampletab
 caption: Four
+tooltip: This tab specifies both a caption and a tooltip
 order: 4
 
 This is the fourth of our sample tabs.