diff --git a/Tools/autotest/arducopter.py b/Tools/autotest/arducopter.py
index e4acbb1b7d..289b1b6b43 100644
--- a/Tools/autotest/arducopter.py
+++ b/Tools/autotest/arducopter.py
@@ -5229,7 +5229,7 @@ class AutoTestHeli(AutoTestCopter):
             self.arm_vehicle()
             self.set_rc(8, 2000)
             self.progress("wait for rotor runup to complete")
-            self.wait_servo_channel_value(8, 1900, timeout=10)
+            self.wait_servo_channel_value(8, 1660, timeout=10)
             self.delay_sim_time(20)
             # check we are still on the ground...
             m = self.mav.recv_match(type='GLOBAL_POSITION_INT', blocking=True)
@@ -5345,7 +5345,7 @@ class AutoTestHeli(AutoTestCopter):
         self.arm_vehicle()
         self.set_rc(8, 2000)
         self.progress("wait for rotor runup to complete")
-        self.wait_servo_channel_value(8, 1900, timeout=10)
+        self.wait_servo_channel_value(8, 1660, timeout=10)
         self.delay_sim_time(20)
         self.set_rc(3, 2000)
         self.wait_altitude(start_alt - 1,