diff --git a/requirements.txt b/requirements.txt
index b3dc23f..244688f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,11 +2,6 @@
 # within individual charm repos.  See the 'global' dir contents for available
 # choices of *requirements.txt files for OpenStack Charms:
 #     https://github.com/openstack-charmers/release-tools
-#
-# NOTE(lourot): This might look like a duplication of test-requirements.txt but
-# some tox targets use only test-requirements.txt whereas charm-build uses only
-# requirements.txt
-setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
 
 # NOTE: newer versions of cryptography require a Rust compiler to build,
 # see
diff --git a/test-requirements.txt b/test-requirements.txt
index a7936e6..3fd5feb 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,7 +4,6 @@
 #     https://github.com/openstack-charmers/release-tools
 #
 pyparsing<3.0.0  # aodhclient is pinned in zaza and needs pyparsing < 3.0.0, but cffi also needs it, so pin here.
-setuptools<50.0.0  # https://github.com/pypa/setuptools/commit/04e3df22df840c6bb244e9b27bc56750c44b7c85
 
 stestr>=2.2.0
 
diff --git a/tox.ini b/tox.ini
index 3e44bd9..c2178fb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -73,9 +73,16 @@ deps =
     -r{toxinidir}/test-requirements.txt
 commands = stestr run --slowest {posargs}
 
+[testenv:py312]
+basepython = python3.12
+deps =
+    -c {env:TEST_CONSTRAINTS_FILE:https://raw.githubusercontent.com/openstack-charmers/zaza-openstack-tests/master/constraints/constraints-2024.1.txt}
+    -r{toxinidir}/test-requirements.txt
+commands = stestr run --slowest {posargs}
+
 [testenv:pep8]
 basepython = python3
-deps = flake8==3.9.2
+deps = flake8==7.1.1
        git+https://github.com/juju/charm-tools.git
 commands = flake8 {posargs} src unit_tests