diff --git a/Tools/autotest/arducopter.py b/Tools/autotest/arducopter.py
index 2e0807a088..92ec25adc5 100644
--- a/Tools/autotest/arducopter.py
+++ b/Tools/autotest/arducopter.py
@@ -319,6 +319,8 @@ def fly_ArduCopter():
     hquad.close()
 
     shutil.copy(logfile, util.reltopdir("../buildlogs/ArduCopter-test.mavlog"))
+    if os.path.exists('ArduCopter-valgrind.log'):
+        shutil.copy("ArduCopter-valgrind.log", util.reltopdir("../buildlogs/ArduCopter-valgrind.log"))
     util.run_cmd(util.reltopdir("../pymavlink/examples/mavtogpx.py") + " " + util.reltopdir("../buildlogs/ArduCopter-test.mavlog"))
     util.run_cmd(util.reltopdir("../bin/gpxtokml") + " " + util.reltopdir("../buildlogs/ArduCopter-test.mavlog.gpx"))
 
diff --git a/Tools/autotest/util.py b/Tools/autotest/util.py
index f08421044f..dbd8873322 100644
--- a/Tools/autotest/util.py
+++ b/Tools/autotest/util.py
@@ -50,7 +50,7 @@ def build_SIL(atype):
 
 def start_SIL(atype):
     '''launch a SIL instance'''
-    ret = pexpect.spawn(reltopdir('tmp/%s.build/%s.elf' % (atype, atype)),
+    ret = pexpect.spawn(('valgrind -q --log-file=%s-valgrind.log ' % atype) + reltopdir('tmp/%s.build/%s.elf' % (atype, atype)),
                         logfile=sys.stdout, timeout=5)
     ret.expect('Waiting for connection')
     return ret