diff --git a/Tools/autotest/quadplane.py b/Tools/autotest/quadplane.py
index 0ebd60008b..2464c2a5fa 100644
--- a/Tools/autotest/quadplane.py
+++ b/Tools/autotest/quadplane.py
@@ -40,7 +40,7 @@ def fly_mission(mavproxy, mav, filename, fence, height_accuracy=-1):
     return True
 
 
-def fly_QuadPlane(viewerip=None, map=False):
+def fly_QuadPlane(viewerip=None, map=False, valgrind=False):
     '''fly QuadPlane in SIL
 
     you can pass viewerip as an IP address to optionally send fg and
@@ -55,7 +55,7 @@ def fly_QuadPlane(viewerip=None, map=False):
         options += ' --map'
 
     sil = util.start_SIL('ArduPlane', model='quadplane', wipe=True, home=HOME_LOCATION, speedup=10,
-                         defaults_file=os.path.join(testdir, 'quadplane.parm'))
+                         defaults_file=os.path.join(testdir, 'quadplane.parm'), valgrind=valgrind)
     mavproxy = util.start_MAVProxy_SIL('QuadPlane', options=options)
     mavproxy.expect('Telemetry log: (\S+)')
     logfile = mavproxy.match.group(1)