diff --git a/Tools/autotest/arducopter.py b/Tools/autotest/arducopter.py
index 155bfdb991..a29aa2832e 100644
--- a/Tools/autotest/arducopter.py
+++ b/Tools/autotest/arducopter.py
@@ -301,7 +301,7 @@ def fly_ArduCopter():
     util.expect_setup_callback(mavproxy, expect_callback)
 
     # start hil_quad.py
-    hquad = pexpect.spawn(util.reltopdir('../HILTest/hil_quad.py') + ' --fgout=192.168.2.15:9123 --home=%s' % HOME_LOCATION,
+    hquad = pexpect.spawn(util.reltopdir('../HILTest/hil_quad.py') + ' --fgout=192.168.2.15:9123 --fgrate=200 --home=%s' % HOME_LOCATION,
                         logfile=sys.stdout, timeout=10)
     util.pexpect_autoclose(hquad)
     hquad.expect('Starting at')
diff --git a/Tools/autotest/util.py b/Tools/autotest/util.py
index df721ae68e..e9e4ff99d6 100644
--- a/Tools/autotest/util.py
+++ b/Tools/autotest/util.py
@@ -106,11 +106,12 @@ def start_SIL(atype, valgrind=False, wipe=False, CLI=False):
     return ret
 
 def start_MAVProxy_SIL(atype, aircraft=None, setup=False, master='tcp:127.0.0.1:5760',
+                       fgrate=200,
                        options=None, logfile=sys.stdout):
     '''launch mavproxy connected to a SIL instance'''
     global close_list
     MAVPROXY = reltopdir('../MAVProxy/mavproxy.py')
-    cmd = MAVPROXY + ' --master=%s' % master
+    cmd = MAVPROXY + ' --master=%s --fgrate=%u' % (master, fgrate)
     if setup:
         cmd += ' --setup'
     if aircraft is None: