diff --git a/lower-constraints.txt b/lower-constraints.txt
index 34d62119..3fef2eb6 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -25,7 +25,6 @@ MarkupSafe==1.0
 mccabe==0.2.1
 mock==2.0.0
 monotonic==0.6
-mox3==0.20.0
 netaddr==0.7.18
 netifaces==0.10.4
 os-client-config==1.28.0
diff --git a/oslo_db/tests/sqlalchemy/test_utils.py b/oslo_db/tests/sqlalchemy/test_utils.py
index ab468f74..f193dfd5 100644
--- a/oslo_db/tests/sqlalchemy/test_utils.py
+++ b/oslo_db/tests/sqlalchemy/test_utils.py
@@ -77,8 +77,6 @@ class FakeTable(Base):
     updated_at = Column(DateTime, nullable=True)
     enabled = Column(Boolean, default=True)
 
-    # mox is comparing in some awkward way that
-    # in this case requires the same identity of object
     _expr_to_appease_mox = project_id + snapshot_id
 
     @hybrid_property
diff --git a/oslo_db/tests/utils.py b/oslo_db/tests/utils.py
index 00eb468b..bbf1fa81 100644
--- a/oslo_db/tests/utils.py
+++ b/oslo_db/tests/utils.py
@@ -17,7 +17,6 @@ import contextlib
 
 from oslo_config import cfg
 from oslotest import base as test_base
-from oslotest import moxstubout
 import six
 
 
@@ -33,8 +32,5 @@ else:
 class BaseTestCase(test_base.BaseTestCase):
     def setUp(self, conf=cfg.CONF):
         super(BaseTestCase, self).setUp()
-        moxfixture = self.useFixture(moxstubout.MoxStubout())
-        self.mox = moxfixture.mox
-        self.stubs = moxfixture.stubs
         self.conf = conf
         self.addCleanup(self.conf.reset)