diff --git a/src/Demos/sgv/Makefile b/src/Demos/sgv/Makefile
index 6ad9c641e..f427274f2 100644
--- a/src/Demos/sgv/Makefile
+++ b/src/Demos/sgv/Makefile
@@ -23,5 +23,6 @@ include $(OSGHOME)/Make/makerules
 
 test :
 	sgv cow.osg
+	sgv -stereo cessna.osg
 	sgv Town.osg