--- a/taskcluster/mach_commands.py
+++ b/taskcluster/mach_commands.py
@@ -1,14 +1,15 @@
 # -*- coding: utf-8 -*-
 
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+
 from __future__ import absolute_import, print_function, unicode_literals
 
 import json
 import logging
 import sys
 import traceback
 
 from mach.decorators import (

--- a/taskcluster/taskgraph/test/test_target_tasks.py
+++ b/taskcluster/taskgraph/test/test_target_tasks.py
@@ -12,17 +12,17 @@ from ..graph import Graph
 from ..taskgraph import TaskGraph
 from .util import TestTask
 from mozunit import main
 
 
 class FakeTryOptionSyntax(object):
 
     def __init__(self, message, task_graph):
-        pass
+        self.trigger_tests = 0
 
     def task_matches(self, attributes):
         return 'at-at' in attributes
 
 
 class TestTargetTasks(unittest.TestCase):
 
     def test_from_parameters(self):