diff --git a/Tools/autotest/arducopter.py b/Tools/autotest/arducopter.py
index e87bea954d..855f572e8d 100644
--- a/Tools/autotest/arducopter.py
+++ b/Tools/autotest/arducopter.py
@@ -2609,7 +2609,7 @@ class AutoTestCopter(AutoTest):
         last_seq = None
         while self.armed(): # we RTL at end of mission
             now = self.get_sim_time_cached()
-            if now - tstart > 120:
+            if now - tstart > 200:
                 raise AutoTestTimeoutException("Did not disarm as expected")
             m = self.mav.recv_match(type='MISSION_CURRENT', blocking=True)
             at_delay_item = ""