diff --git a/designatedashboard/tests/base.py b/designatedashboard/tests/base.py
index 6c9b03a..9062a3a 100644
--- a/designatedashboard/tests/base.py
+++ b/designatedashboard/tests/base.py
@@ -31,7 +31,6 @@ _TRUE_VALUES = ('True', 'true', '1', 'yes')
 class TestCase(testtools.TestCase):
 
     """Test case base class for all unit tests."""
-    use_mox = False
 
     def setUp(self):
         """Run before each test method to initialize test environment."""
@@ -63,7 +62,6 @@ class BaseRecordFormCleanTests(test.TestCase):
 
     DOMAIN_NAME = 'foo.com.'
     HOSTNAME = 'www'
-    use_mox = False
 
     MSG_FIELD_REQUIRED = 'This field is required'
     MSG_INVALID_HOSTNAME = 'Enter a valid hostname. The '\
diff --git a/lower-constraints.txt b/lower-constraints.txt
index b1eb3d4..75907a1 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -46,7 +46,6 @@ MarkupSafe==1.0
 mccabe==0.2.1
 mock==2.0.0
 monotonic==1.4
-mox3==0.20.0
 msgpack==0.5.6
 munch==2.2.0
 netaddr==0.7.19
diff --git a/requirements.txt b/requirements.txt
index 5d08625..6a14eb1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,4 @@ pbr!=2.1.0,>=2.0.0 # Apache-2.0
 Babel!=2.4.0,>=2.3.4 # BSD
 python-designateclient>=2.7.0 # Apache-2.0
 
-horizon>=14.0.0.0b1 # Apache-2.0
+horizon>=14.0.0.0b2 # Apache-2.0