diff --git a/.zuul.yaml b/.zuul.yaml
index 67a39c4..737eaf3 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -1,7 +1,11 @@
 - project:
     check:
       jobs:
-        - openstack-tox-lower-constraints
+        - openstack-tox-lower-constraints:
+            required-projects:
+              - openstack/horizon
     gate:
       jobs:
-        - openstack-tox-lower-constraints
+        - openstack-tox-lower-constraints:
+            required-projects:
+              - openstack/horizon
diff --git a/test-requirements.txt b/test-requirements.txt
index 6c79524..c1f00c5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -12,7 +12,6 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 django-nose>=1.4.4 # BSD
 mock>=2.0.0 # BSD
-mox3>=0.20.0 # Apache-2.0
 nodeenv>=0.9.4 # BSD
 nose>=1.3.7 # LGPL
 nose-exclude>=0.3.0 # LGPL
diff --git a/zaqar_ui/test/helpers.py b/zaqar_ui/test/helpers.py
index efe3b99..eb899c0 100644
--- a/zaqar_ui/test/helpers.py
+++ b/zaqar_ui/test/helpers.py
@@ -21,7 +21,6 @@ from zaqar_ui.test import test_data
 
 class APITestCase(helpers.APITestCase):
     """Extends the base Horizon APITestCase for zaqarclient"""
-
     def setUp(self):
         super(APITestCase, self).setUp()
         self._original_magnumclient = api.zaqar.zaqarclient