--- a/testing/mozharness/scripts/l10n_bumper.py
+++ b/testing/mozharness/scripts/l10n_bumper.py
@@ -186,17 +186,17 @@ class L10nBumper(VCSScript):
             for k, v in platform_dict.items():
                 v['revision'] = 'default'
                 revision_dict[k] = v
         self.info("revision_dict:\n%s" % pprint.pformat(revision_dict))
         return revision_dict
 
     def build_commit_message(self, name, locale_map):
         comments = ''
-        approval_str = 'r=release a=l10n-bump'
+        approval_str = 'DONTBUILD r=release a=l10n-bump'
         for locale, revision in sorted(locale_map.items()):
             comments += "%s -> %s\n" % (locale, revision)
         if self.config['ignore_closed_tree']:
             approval_str += " CLOSED TREE"
         message = 'no bug - Bumping %s %s\n\n' % (name, approval_str)
         message += comments
         message = message.encode("utf-8")
         return message