diff --git a/Tools/autotest/sim_arducopter.sh b/Tools/autotest/sim_arducopter.sh
index f6129ccd77..37e3421d38 100755
--- a/Tools/autotest/sim_arducopter.sh
+++ b/Tools/autotest/sim_arducopter.sh
@@ -29,6 +29,7 @@ make clean $target
 tfile=$(tempfile)
 echo r > $tfile
 gnome-terminal -e "gdb -x $tfile --args /tmp/ArduCopter.build/ArduCopter.elf"
+#gnome-terminal -e "valgrind -q /tmp/ArduCopter.build/ArduCopter.elf"
 sleep 2
 rm -f $tfile
 gnome-terminal -e "../Tools/autotest/pysim/sim_multicopter.py --frame=$frame --home=-35.362938,149.165085,584,270"
diff --git a/Tools/autotest/sim_arduplane.sh b/Tools/autotest/sim_arduplane.sh
index 1494272b24..c1085386c1 100755
--- a/Tools/autotest/sim_arduplane.sh
+++ b/Tools/autotest/sim_arduplane.sh
@@ -10,6 +10,7 @@ make clean sitl
 tfile=$(tempfile)
 echo r > $tfile
 gnome-terminal -e "gdb -x $tfile --args /tmp/ArduPlane.build/ArduPlane.elf"
+#gnome-terminal -e "valgrind -q /tmp/ArduPlane.build/ArduPlane.elf"
 sleep 2
 rm -f $tfile
 gnome-terminal -e '../Tools/autotest/jsbsim/runsim.py --home=-35.362938,149.165085,584,270 --wind=5,180,0.2'