diff --git a/dives/test15.xml b/dives/test15.xml
index 999e81083..a95dc28c1 100644
--- a/dives/test15.xml
+++ b/dives/test15.xml
@@ -5,8 +5,11 @@
   <temperature air='2.0 C' water='6.0 C' />
   <location>15th test dive - trimix</location>
   <notes>Nothing of value, just getting something for the divelist</notes>
+  <cylinder size='15.0 l' workpressure='232.009 bar' description='15L 232 bar' start='227.527 bar' end='96.527 bar' />
   <cylinder size='15.0 l' workpressure='232.009 bar' description='15L 232 bar' o2='15.0%' he='50.0%' start='227.527 bar' end='75.842 bar' />
   <cylinder size='6.9 l' workpressure='206.843 bar' description='AL50' o2='70.0%' start='206.843 bar' end='68.948 bar' />
-  <cylinder size='15.0 l' workpressure='232.009 bar' description='15L 232 bar' start='227.527 bar' end='96.527 bar' />
+  <event time='10:00 min' name='gaschange' value='15' />
+  <event time='20:30 min' name='gaschange' value='70' />
+  <event time='25:59 min' name='gaschange' value='21' />
 </dive>
 </dives>