diff --git a/Tools/autotest/quadplane.py b/Tools/autotest/quadplane.py
index 0e6ef03d3f6c2..3a6aff9163843 100644
--- a/Tools/autotest/quadplane.py
+++ b/Tools/autotest/quadplane.py
@@ -1220,6 +1220,7 @@ def MAV_CMD_DO_ENGINE_CONTROL(self):
             self.start_subtest("Check start chan control disable")
             old_start_channel_value = self.get_rc_channel_value(rc_engine_start_chan)
             self.set_rc(rc_engine_start_chan, 1000)
+            self.delay_sim_time(1) # Make sure the RC change has registered
             self.context_collect('STATUSTEXT')
             method(mavutil.mavlink.MAV_CMD_DO_ENGINE_CONTROL, p1=1, want_result=mavutil.mavlink.MAV_RESULT_FAILED)
             self.wait_statustext("start control disabled", check_context=True)