Just disable force to ensure that bot_update really is running everywhere.

recipe_modules/bot_update/example.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 DEPS = [
   'bot_update',
   'gclient',
   'recipe_engine/path',
   'recipe_engine/properties',
 ]
@@ skipping 118 matching lines @@
       buildername='Experimental Builder',
       slavename='somehost',
       force=1
   )
   yield api.test('no_shallow') + api.properties(
       mastername='experimental',
       buildername='Experimental Builder',
       slavename='somehost',
       no_shallow=1
   )
-  yield api.test('off') + api.properties(
-      mastername='experimental',
-      buildername='Experimental Builder',
-      slavename='somehost',
-  )
   yield api.test('clobber') + api.properties(
       mastername='experimental',
       buildername='Experimental Builder',
       slavename='somehost',
       clobber=1
   )
   yield api.test('reset_root_solution_revision') + api.properties(
       mastername='experimental',
       buildername='Experimental Builder',
       slavename='somehost',
@@ skipping 26 matching lines @@
       patch_url='http://src.chromium.org/foo/bar',
       patch_project='v8',
       revisions={'src/v8': 'abc'}
   )
   yield api.test('tryjob_v8_head_by_default') + api.properties.tryserver(
       patch_project='v8',
   )
   yield api.test('tryjob_gerrit_angle') + api.properties.tryserver_gerrit(
       full_project_name='angle/angle',
   )