diff --git a/lower-constraints.txt b/lower-constraints.txt
new file mode 100644
index 0000000000..7d79ecf356
--- /dev/null
+++ b/lower-constraints.txt
@@ -0,0 +1,57 @@
+alembic==1.4.2
+automaton==1.9.0
+bandit==1.1.0
+coverage==4.0
+ddt==1.2.1
+eventlet==0.18.2
+fixtures==3.0.0
+futurist==1.2.0
+ironic-lib==4.6.1
+iso8601==0.1.11
+Jinja2==2.10
+jsonpatch==1.16
+jsonschema==3.2.0
+keystoneauth1==4.2.0
+keystonemiddleware==4.17.0
+openstacksdk==0.48.0
+oslo.concurrency==4.2.0
+oslo.config==6.8.0
+oslo.context==2.22.0
+oslo.db==9.1.0
+oslo.i18n==3.20.0
+oslo.log==4.3.0
+oslo.messaging==5.29.0
+oslo.middleware==3.31.0
+oslo.policy==3.7.0
+oslo.reports==1.18.0
+oslo.rootwrap==5.8.0
+oslo.serialization==2.25.0
+oslo.service==1.24.0
+oslotest==3.2.0
+oslo.upgradecheck==1.3.0
+oslo.utils==4.5.0
+oslo.versionedobjects==1.31.2
+osprofiler==1.5.0
+os-traits==0.4.0
+pbr==3.1.1
+pecan==1.0.0
+psutil==3.2.2
+psycopg2==2.8.5
+pycdlib==1.11.0
+PyMySQL==0.8.0
+pysnmp==4.4.12
+python-cinderclient==3.3.0
+python-glanceclient==2.8.0
+python-swiftclient==3.2.0
+pytz==2013.6
+requests==2.18.0
+rfc3986==1.2.0
+SQLAlchemy==1.2.19
+stestr==2.0.0
+stevedore==1.20.0
+tenacity==6.2.0
+testtools==2.2.0
+tooz==2.7.0
+virtualbmc==1.4.0
+WebOb==1.7.1
+WebTest==2.0.27
diff --git a/setup.cfg b/setup.cfg
index 8dc5b4e9ee..1656b920b1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -197,6 +197,6 @@ tag_svn_revision = 0
 guru_meditation_reports =
   oslo.reports>=1.18.0 # Apache-2.0
 i18n =
-  oslo.i18n>=3.15.3 # Apache-2.0
+  oslo.i18n>=3.20.0 # Apache-2.0
 devstack =
   virtualbmc>=1.4.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 59d5f71c9e..04497af16e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -153,3 +153,9 @@ paths = ./ironic/hacking/
 usedevelop = False
 deps = -r{toxinidir}/test-requirements.txt
 commands = bandit -r ironic -x tests -n5 -ll -c tools/bandit.yml
+
+[testenv:lower-constraints]
+deps =
+  -c{toxinidir}/lower-constraints.txt
+  -r{toxinidir}/test-requirements.txt
+  -r{toxinidir}/requirements.txt
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index 23aa568fba..2fcec138c8 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -2,6 +2,7 @@
     templates:
       - check-requirements
       - openstack-cover-jobs
+      - openstack-lower-constraints-master-branch-jobs
       - openstack-python3-xena-jobs
       - openstack-python3-xena-jobs-arm64
       - periodic-stable-jobs