deleted file mode 100644
--- a/taskcluster/comm_taskgraph/test/__init__.py
+++ /dev/null
@@ -1,5 +0,0 @@
-#  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

new file mode 100644
--- /dev/null
+++ b/taskcluster/comm_taskgraph/test/conftest.py
@@ -0,0 +1,7 @@
+import sys
+import os
+
+HERE = os.path.dirname(__file__)
+EXT_PATH = os.path.abspath(os.path.join(HERE, "..", ".."))
+
+sys.path.insert(0, EXT_PATH)

--- a/taskcluster/comm_taskgraph/test/test_optimization_strategies.py
+++ b/taskcluster/comm_taskgraph/test/test_optimization_strategies.py
@@ -6,17 +6,17 @@ from __future__ import absolute_import
 import hashlib
 from datetime import datetime
 from time import mktime
 
 import responses
 import pytest
 from mozunit import main
 
-# from responses import RequestsMock
+import conftest  # noqa: F401
 
 from comm_taskgraph.optimize import SkipSuiteOnly
 from gecko_taskgraph.optimize import registry
 from gecko_taskgraph.task import Task
 
 
 def generate_task():
     task = {}

--- a/taskcluster/comm_taskgraph/test/test_parameters.py
+++ b/taskcluster/comm_taskgraph/test/test_parameters.py
@@ -1,15 +1,16 @@
 #  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 unittest
+import conftest  # noqa: F401
 
 import comm_taskgraph.parameters  # noqa: F401
 from gecko_taskgraph.parameters import Parameters
 from mozunit import main
 
 
 class TestCommParameters(unittest.TestCase):