diff --git a/Tools/autotest/arduplane.py b/Tools/autotest/arduplane.py
index fc8c59b02b..3b87f6b7c3 100644
--- a/Tools/autotest/arduplane.py
+++ b/Tools/autotest/arduplane.py
@@ -1482,6 +1482,9 @@ class AutoTestPlane(AutoTest):
         ret[8] = 1800
         return ret
 
+    def initial_mode_switch_mode(self):
+        return "MANUAL"
+
     def default_mode(self):
         return "MANUAL"