diff --git a/test/subsup.html b/test/subsup.html
index f3cac4fe..6a968abc 100644
--- a/test/subsup.html
+++ b/test/subsup.html
@@ -7,5 +7,7 @@ Let's try.. 2<sup>2<sup>2<sup>2</sup></sup></sup>.. no, we don't handle this wel
 be so big problem, I think.. What about <sub>sub<sup>sup</sup>sub</sub>..? And, hmm.. this should
 do it, I hope :-).
 </p>
+<sub>sub<sub>sub<sup>sup<sup>sup</sup><sub>sub</sub></sup></sub></sub><br>
+<sub>sub<sub>sub</sub></sub><sup>sup<sup>sup</sup></sup><sub>sub</sub>
 </body>
 </html>