--- a/testing/marionette/client/marionette_driver/marionette.py
+++ b/testing/marionette/client/marionette_driver/marionette.py
@@ -1054,17 +1054,17 @@ class Marionette(object):
             if canceled:
                 raise errors.MarionetteException(
                     "Something cancelled the quit application request")
 
         body = None
         if len(flags) > 0:
             body = {"flags": list(flags)}
 
-        self._send_message("quit", body)
+        self._send_message("quitApplication", body)
 
     @do_process_check
     def quit(self, clean=False, in_app=False, callback=None):
         """Terminate the currently running instance.
 
         This command will delete the active marionette session. It also allows
         manipulation of eg. the profile data while the application is not running.
         To start the application again, :func:`start_session` has to be called.