diff --git a/TESTING.rst b/TESTING.rst
index c5a4d69f0be..fdffebe0b11 100644
--- a/TESTING.rst
+++ b/TESTING.rst
@@ -449,9 +449,9 @@ To run only the unit tests::
 
 Many changes span across both the neutron and neutron-lib repos, and tox
 will always build the test environment using the published module versions
-specified in requirements.txt and lower-constraints.txt. To run tox tests
-against a different version of neutron-lib, use the TOX_ENV_SRC_MODULES
-environment variable to point at a local package repo.
+specified in requirements.txt. To run tox tests against a different version
+of neutron-lib, use the TOX_ENV_SRC_MODULES environment variable to point
+at a local package repo.
 
 For example, to run against the 'master' branch of neutron-lib::
 
diff --git a/lower-constraints.txt b/lower-constraints.txt
deleted file mode 100644
index 044f49d66af..00000000000
--- a/lower-constraints.txt
+++ /dev/null
@@ -1,139 +0,0 @@
-alabaster==0.7.10
-alembic==1.6.5
-amqp==2.5.0
-appdirs==1.4.3
-Babel==2.3.4
-beautifulsoup4==4.6.0
-cachetools==2.0.0
-cryptography<3.3
-cffi==1.13.2
-cliff==3.4.0
-cmd2==0.8.0
-contextlib2==0.4.0
-coverage==4.0
-ddt==1.0.1
-debtcollector==1.19.0
-decorator==4.1.0
-deprecation==1.0
-doc8==0.8.1
-docutils==0.11
-dogpile.cache==0.6.5
-dulwich==0.15.0
-eventlet==0.26.1
-extras==1.0.0
-fasteners==0.7.0
-fixtures==3.0.0
-future==0.16.0
-futurist==1.2.0
-gitdb==0.6.4
-GitPython==1.0.1
-greenlet==0.4.16
-httplib2==0.9.1
-imagesize==0.7.1
-iso8601==0.1.11
-Jinja2==2.10
-jmespath==0.9.0
-jsonpatch==1.16
-jsonpointer==1.13
-jsonschema==2.6.0
-keystoneauth1==3.14.0
-keystonemiddleware==5.1.0
-kombu==4.6.1
-linecache2==1.0.0
-logilab-common==1.4.1
-logutils==0.3.5
-Mako==1.0.7
-MarkupSafe==1.1.1
-monotonic==0.6;python_version<'3.3'
-mox3==0.20.0
-msgpack-python==0.4.0
-munch==2.1.0
-netaddr==0.7.18
-netifaces==0.10.4
-neutron-lib==2.20.0
-openstacksdk==0.31.2
-os-client-config==1.28.0
-os-ken==2.2.0
-os-resource-classes==1.1.0
-os-service-types==1.7.0
-os-vif==1.15.1
-osc-lib==1.12.0
-oslo.cache==1.26.0
-oslo.concurrency==3.26.0
-oslo.config==8.0.0
-oslo.context==2.22.0
-oslo.db==4.44.0
-oslo.i18n==3.20.0
-oslo.log==4.5.0
-oslo.messaging==7.0.0
-oslo.middleware==3.31.0
-oslo.policy==3.12.0
-oslo.privsep==2.3.0
-oslo.reports==1.18.0
-oslo.rootwrap==5.15.0
-oslo.serialization==2.25.0
-oslo.service==2.8.0
-oslo.upgradecheck==1.3.0
-oslo.utils==4.8.0
-oslo.versionedobjects==1.35.1
-oslotest==3.2.0
-osprofiler==2.3.0
-ovs==2.10.0
-ovsdbapp==1.16.0
-packaging==20.4
-Paste==2.0.2
-PasteDeploy==1.5.0
-pbr==4.0.0
-pecan==1.3.2
-pika-pool==0.1.3
-pika==0.10.0
-positional==1.2.1
-prettytable==0.7.2
-psutil==5.3.0
-pycadf==1.1.0
-pycparser==2.18
-Pygments==2.2.0
-pyinotify==0.9.6
-PyMySQL==0.7.6
-pyOpenSSL==17.1.0
-pyparsing==2.1.0
-pyperclip==1.5.27
-pyroute2==0.6.6
-python-dateutil==2.7.0
-python-designateclient==2.7.0
-python-editor==1.0.3
-python-keystoneclient==3.8.0
-python-mimeparse==1.6.0
-python-neutronclient==7.8.0
-python-novaclient==9.1.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==5.3.1
-repoze.lru==0.7
-requests==2.18.0
-requestsexceptions==1.2.0
-Routes==2.3.1
-simplejson==3.5.1
-smmap==0.9.0
-snowballstemmer==1.2.1
-sqlalchemy-migrate==0.11.0
-SQLAlchemy==1.4.23
-sqlparse==0.2.2
-statsd==3.2.1
-stestr==1.0.0
-stevedore==2.0.1
-Tempita==0.5.2
-tenacity==6.0.0
-testrepository==0.0.18
-testresources==2.0.0
-testscenarios==0.4
-testtools==2.2.0
-tooz==1.58.0
-tinyrpc==0.6
-traceback2==1.4.0
-vine==1.1.4
-waitress==1.1.0
-WebOb==1.8.2
-WebTest==2.0.27
-wmi==1.4.9
-wrapt==1.12.0
diff --git a/requirements.txt b/requirements.txt
index 74bb8995291..e42009cf9d6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,7 @@
+# Requirements lower bounds listed here are our best effort to keep them up to
+# date but we do not test them so no guarantee of having them all correct. If
+# you find any incorrect lower bounds, let us know or propose a fix.
+
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
diff --git a/tox.ini b/tox.ini
index 5c8702934ac..5fa04d79289 100644
--- a/tox.ini
+++ b/tox.ini
@@ -253,14 +253,6 @@ commands = oslopolicy-sample-generator --config-file=etc/oslo-policy-generator/p
 deps = bindep
 commands = bindep test
 
-[testenv:lower-constraints]
-setenv = OS_TEST_TIMEOUT={env:OS_TEST_TIMEOUT:60}
-deps =
-  -c{toxinidir}/lower-constraints.txt
-  -r{toxinidir}/test-requirements.txt
-  -r{toxinidir}/requirements.txt
-  hacking>=3.0.1,<3.1.0 # Apache-2.0
-
 [testenv:requirements]
 deps =
   -egit+https://opendev.org/openstack/requirements#egg=openstack-requirements
diff --git a/zuul.d/job-templates.yaml b/zuul.d/job-templates.yaml
index 7c69ee4983f..a8900d59a6b 100644
--- a/zuul.d/job-templates.yaml
+++ b/zuul.d/job-templates.yaml
@@ -26,9 +26,6 @@
         - openstack-tox-py310: # from openstack-python3-zed-jobs template
             timeout: 3600
             irrelevant-files:  *irrelevant-files
-        - openstack-tox-lower-constraints:  # from openstack-tox-lower-constraints template
-            timeout: 3600
-            irrelevant-files:  *irrelevant-files
         - openstack-tox-cover:  # from openstack-cover-jobs template
             timeout: 4800
             irrelevant-files:  *irrelevant-files
@@ -48,9 +45,6 @@
         - openstack-tox-py39: # from openstack-python3-zed-jobs template
             timeout: 3600
             irrelevant-files:  *irrelevant-files
-        - openstack-tox-lower-constraints:  # from openstack-tox-lower-constraints template
-            timeout: 3600
-            irrelevant-files:  *irrelevant-files
 
 - project-template:
     name: neutron-experimental-jobs
diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index 981f26abde9..10d53722064 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -6,7 +6,6 @@
     templates:
       - neutron-tempest-plugin-jobs
       - openstack-cover-jobs
-      - openstack-lower-constraints-jobs
       - openstack-python3-zed-jobs
       - openstack-python3-zed-jobs-arm64
       - publish-openstack-docs-pti