diff --git a/build-requirements.txt b/build-requirements.txt
deleted file mode 100644
index b6d2452f..00000000
--- a/build-requirements.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-# NOTES(lourot):
-# * We don't install charmcraft via pip anymore because it anyway spins up a
-#   container and scp the system's charmcraft snap inside it. So the charmcraft
-#   snap is necessary on the system anyway.
-# * `tox -e build` successfully validated with charmcraft 1.2.1
-
-cffi==1.14.6; python_version < '3.6'  # cffi 1.15.0 drops support for py35.
diff --git a/charmcraft.yaml b/charmcraft.yaml
index be6ec7c5..a89bb84e 100644
--- a/charmcraft.yaml
+++ b/charmcraft.yaml
@@ -30,9 +30,3 @@ bases:
       - name: ubuntu
         channel: "22.04"
         architectures: [amd64, s390x, ppc64el, arm64]
-      - name: ubuntu
-        channel: "23.04"
-        architectures: [amd64, s390x, ppc64el, arm64]
-      - name: ubuntu
-        channel: "23.10"
-        architectures: [amd64, s390x, ppc64el, arm64]
diff --git a/hooks/charmhelpers/contrib/openstack/cert_utils.py b/hooks/charmhelpers/contrib/openstack/cert_utils.py
index a25ca995..6620f59f 100644
--- a/hooks/charmhelpers/contrib/openstack/cert_utils.py
+++ b/hooks/charmhelpers/contrib/openstack/cert_utils.py
@@ -414,18 +414,27 @@ def get_requests_for_local_unit(relation_name=None):
         is_legacy_request = set(sent).intersection(legacy_keys)
         for unit in related_units(rid):
             data = relation_get(rid=rid, unit=unit)
-            if data.get(raw_certs_key):
-                bundles.append({
-                    'ca': data['ca'],
-                    'chain': data.get('chain'),
-                    'certs': json.loads(data[raw_certs_key])})
-            elif is_legacy_request:
-                bundles.append({
-                    'ca': data['ca'],
-                    'chain': data.get('chain'),
-                    'certs': {sent['common_name']:
-                              {'cert': data.get(local_name + '.server.cert'),
-                               'key': data.get(local_name + '.server.key')}}})
+            # Note: Bug#2028683 - data may not be available if the certificates
+            # relation hasn't been populated by the providing charm. If no 'ca'
+            # in the data then don't attempt the bundle at all.
+            if data.get('ca'):
+                if data.get(raw_certs_key):
+                    bundles.append({
+                        'ca': data['ca'],
+                        'chain': data.get('chain'),
+                        'certs': json.loads(data[raw_certs_key])
+                    })
+                elif is_legacy_request:
+                    bundles.append({
+                        'ca': data['ca'],
+                        'chain': data.get('chain'),
+                        'certs': {
+                            sent['common_name']: {
+                                'cert': data.get(local_name + '.server.cert'),
+                                'key': data.get(local_name + '.server.key')
+                            }
+                        }
+                    })
 
     return bundles
 
diff --git a/hooks/charmhelpers/contrib/openstack/context.py b/hooks/charmhelpers/contrib/openstack/context.py
index 24a13d0d..1e667fb0 100644
--- a/hooks/charmhelpers/contrib/openstack/context.py
+++ b/hooks/charmhelpers/contrib/openstack/context.py
@@ -545,7 +545,7 @@ class IdentityServiceContext(OSContextGenerator):
                         'internal_auth_url': internal_auth_url,
                     })
 
-                # we keep all veriables in ctxt for compatibility and
+                # we keep all variables in ctxt for compatibility and
                 # add nested dictionary for keystone_authtoken generic
                 # templating
                 if keystonemiddleware_os_release:
@@ -557,6 +557,7 @@ class IdentityServiceContext(OSContextGenerator):
                     # NOTE(jamespage) this is required for >= icehouse
                     # so a missing value just indicates keystone needs
                     # upgrading
+                    ctxt['admin_user_id'] = _resolve('service_user_id')
                     ctxt['admin_tenant_id'] = _resolve('service_tenant_id')
                     ctxt['admin_domain_id'] = _resolve('service_domain_id')
                     return ctxt
@@ -1748,9 +1749,9 @@ class WSGIWorkerConfigContext(WorkerConfigContext):
 
     def __call__(self):
         total_processes = _calculate_workers()
-        enable_wsgi_rotation = config('wsgi-rotation')
-        if enable_wsgi_rotation is None:
-            enable_wsgi_rotation = True
+        enable_wsgi_socket_rotation = config('wsgi-socket-rotation')
+        if enable_wsgi_socket_rotation is None:
+            enable_wsgi_socket_rotation = True
         ctxt = {
             "service_name": self.service_name,
             "user": self.user,
@@ -1764,7 +1765,7 @@ class WSGIWorkerConfigContext(WorkerConfigContext):
             "public_processes": int(math.ceil(self.public_process_weight *
                                               total_processes)),
             "threads": 1,
-            "wsgi_rotation": enable_wsgi_rotation,
+            "wsgi_socket_rotation": enable_wsgi_socket_rotation,
         }
         return ctxt
 
diff --git a/hooks/charmhelpers/contrib/openstack/templates/wsgi-openstack-api.conf b/hooks/charmhelpers/contrib/openstack/templates/wsgi-openstack-api.conf
index 2cb735e9..de5f603f 100644
--- a/hooks/charmhelpers/contrib/openstack/templates/wsgi-openstack-api.conf
+++ b/hooks/charmhelpers/contrib/openstack/templates/wsgi-openstack-api.conf
@@ -12,7 +12,7 @@ Listen {{ admin_port }}
 Listen {{ public_port }}
 {% endif -%}
 
-{% if wsgi_rotation -%}
+{% if wsgi_socket_rotation -%}
 WSGISocketRotation On
 {% else -%}
 WSGISocketRotation Off
diff --git a/hooks/charmhelpers/contrib/openstack/templates/wsgi-openstack-metadata.conf b/hooks/charmhelpers/contrib/openstack/templates/wsgi-openstack-metadata.conf
index 2cb735e9..de5f603f 100644
--- a/hooks/charmhelpers/contrib/openstack/templates/wsgi-openstack-metadata.conf
+++ b/hooks/charmhelpers/contrib/openstack/templates/wsgi-openstack-metadata.conf
@@ -12,7 +12,7 @@ Listen {{ admin_port }}
 Listen {{ public_port }}
 {% endif -%}
 
-{% if wsgi_rotation -%}
+{% if wsgi_socket_rotation -%}
 WSGISocketRotation On
 {% else -%}
 WSGISocketRotation Off
diff --git a/hooks/charmhelpers/contrib/openstack/utils.py b/hooks/charmhelpers/contrib/openstack/utils.py
index e98be2c5..da711c65 100644
--- a/hooks/charmhelpers/contrib/openstack/utils.py
+++ b/hooks/charmhelpers/contrib/openstack/utils.py
@@ -161,6 +161,7 @@ OPENSTACK_CODENAMES = OrderedDict([
     ('2022.2', 'zed'),
     ('2023.1', 'antelope'),
     ('2023.2', 'bobcat'),
+    ('2024.1', 'caracal'),
 ])
 
 # The ugly duckling - must list releases oldest to newest
@@ -416,17 +417,6 @@ def get_os_version_codename(codename, version_map=OPENSTACK_CODENAMES,
     error_out(e)
 
 
-def get_os_version_codename_swift(codename):
-    '''Determine OpenStack version number of swift from codename.'''
-    # for k, v in six.iteritems(SWIFT_CODENAMES):
-    for k, v in SWIFT_CODENAMES.items():
-        if k == codename:
-            return v[-1]
-    e = 'Could not derive swift version for '\
-        'codename: %s' % codename
-    error_out(e)
-
-
 def get_swift_codename(version):
     '''Determine OpenStack codename that corresponds to swift version.'''
     codenames = [k for k, v in SWIFT_CODENAMES.items() if version in v]
@@ -585,7 +575,6 @@ def get_installed_os_version():
     return openstack_release().get('OPENSTACK_CODENAME')
 
 
-@cached
 def openstack_release():
     """Return /etc/os-release in a dict."""
     d = {}
@@ -847,14 +836,10 @@ def openstack_upgrade_available(package):
     if not cur_vers:
         # The package has not been installed yet do not attempt upgrade
         return False
-    if "swift" in package:
-        codename = get_os_codename_install_source(src)
-        avail_vers = get_os_version_codename_swift(codename)
-    else:
-        try:
-            avail_vers = get_os_version_install_source(src)
-        except Exception:
-            avail_vers = cur_vers
+    try:
+        avail_vers = get_os_version_install_source(src)
+    except Exception:
+        avail_vers = cur_vers
     apt.init()
     return apt.version_compare(avail_vers, cur_vers) >= 1
 
diff --git a/hooks/charmhelpers/contrib/storage/linux/ceph.py b/hooks/charmhelpers/contrib/storage/linux/ceph.py
index 2e1fc1b5..6ec67cba 100644
--- a/hooks/charmhelpers/contrib/storage/linux/ceph.py
+++ b/hooks/charmhelpers/contrib/storage/linux/ceph.py
@@ -158,15 +158,19 @@ def get_osd_settings(relation_name):
     return _order_dict_by_key(osd_settings)
 
 
-def send_application_name(relid=None):
+def send_application_name(relid=None, app_name=None):
     """Send the application name down the relation.
 
     :param relid: Relation id to set application name in.
     :type relid: str
+    :param app_name: Application name to send in the relation.
+    :type app_name: str
     """
+    if app_name is None:
+        app_name = application_name()
     relation_set(
         relation_id=relid,
-        relation_settings={'application-name': application_name()})
+        relation_settings={'application-name': app_name})
 
 
 def send_osd_settings():
diff --git a/hooks/charmhelpers/contrib/storage/linux/lvm.py b/hooks/charmhelpers/contrib/storage/linux/lvm.py
index d0a57211..0d294c79 100644
--- a/hooks/charmhelpers/contrib/storage/linux/lvm.py
+++ b/hooks/charmhelpers/contrib/storage/linux/lvm.py
@@ -17,8 +17,6 @@ from subprocess import (
     CalledProcessError,
     check_call,
     check_output,
-    Popen,
-    PIPE,
 )
 
 
@@ -58,9 +56,7 @@ def remove_lvm_physical_volume(block_device):
 
     :param block_device: str: Full path of block device to scrub.
     '''
-    p = Popen(['pvremove', '-ff', block_device],
-              stdin=PIPE)
-    p.communicate(input='y\n')
+    check_call(['pvremove', '-ff', '--yes', block_device])
 
 
 def list_lvm_volume_group(block_device):
diff --git a/hooks/charmhelpers/core/unitdata.py b/hooks/charmhelpers/core/unitdata.py
index 8f4bbc61..65153f1f 100644
--- a/hooks/charmhelpers/core/unitdata.py
+++ b/hooks/charmhelpers/core/unitdata.py
@@ -151,6 +151,7 @@ import contextlib
 import datetime
 import itertools
 import json
+import logging
 import os
 import pprint
 import sqlite3
@@ -521,6 +522,42 @@ _KV = None
 
 def kv():
     global _KV
+
+    # If we are running unit tests, it is useful to go into memory-backed KV store to
+    # avoid concurrency issues when running multiple tests. This is not a
+    # problem when juju is running normally.
+
+    env_var = os.environ.get("CHARM_HELPERS_TESTMODE", "auto").lower()
+    if env_var not in ["auto", "no", "yes"]:
+        logging.warning("Unknown value for CHARM_HELPERS_TESTMODE '%s'"
+                        ", assuming 'no'", env_var)
+        env_var = "no"
+
+    if env_var == "no":
+        in_memory_db = False
+    elif env_var == "yes":
+        in_memory_db = True
+    elif env_var == "auto":
+        # If UNIT_STATE_DB is set, respect this request
+        if "UNIT_STATE_DB" in os.environ:
+            in_memory_db = False
+        # Autodetect normal juju execution by looking for juju variables
+        elif "JUJU_CHARM_DIR" in os.environ or "JUJU_UNIT_NAME" in os.environ:
+            in_memory_db = False
+        else:
+            # We are probably running in unit test mode
+            logging.warning("Auto-detected unit test environment for KV store.")
+            in_memory_db = True
+    else:
+        # Help the linter realise that in_memory_db is always set
+        raise Exception("Cannot reach this line")
+
     if _KV is None:
-        _KV = Storage()
+        if in_memory_db:
+            _KV = Storage(":memory:")
+        else:
+            _KV = Storage()
+    else:
+        if in_memory_db and _KV.db_path != ":memory:":
+            logging.warning("Running with in_memory_db and KV is not set to :memory:")
     return _KV
diff --git a/hooks/charmhelpers/fetch/snap.py b/hooks/charmhelpers/fetch/snap.py
index 36d6bce9..7ab7ce3e 100644
--- a/hooks/charmhelpers/fetch/snap.py
+++ b/hooks/charmhelpers/fetch/snap.py
@@ -52,7 +52,7 @@ def _snap_exec(commands):
     :param commands: List commands
     :return: Integer exit code
     """
-    assert type(commands) == list
+    assert isinstance(commands, list)
 
     retry_count = 0
     return_code = None
diff --git a/hooks/charmhelpers/fetch/ubuntu.py b/hooks/charmhelpers/fetch/ubuntu.py
index 1be992c4..d0089eb7 100644
--- a/hooks/charmhelpers/fetch/ubuntu.py
+++ b/hooks/charmhelpers/fetch/ubuntu.py
@@ -246,6 +246,14 @@ CLOUD_ARCHIVE_POCKETS = {
     'bobcat/proposed': 'jammy-proposed/bobcat',
     'jammy-bobcat/proposed': 'jammy-proposed/bobcat',
     'jammy-proposed/bobcat': 'jammy-proposed/bobcat',
+    # caracal
+    'caracal': 'jammy-updates/caracal',
+    'jammy-caracal': 'jammy-updates/caracal',
+    'jammy-caracal/updates': 'jammy-updates/caracal',
+    'jammy-updates/caracal': 'jammy-updates/caracal',
+    'caracal/proposed': 'jammy-proposed/caracal',
+    'jammy-caracal/proposed': 'jammy-proposed/caracal',
+    'jammy-proposed/caracal': 'jammy-proposed/caracal',
 
     # OVN
     'focal-ovn-22.03': 'focal-updates/ovn-22.03',
@@ -279,6 +287,7 @@ OPENSTACK_RELEASES = (
     'zed',
     'antelope',
     'bobcat',
+    'caracal',
 )
 
 
@@ -308,6 +317,7 @@ UBUNTU_OPENSTACK_RELEASE = OrderedDict([
     ('kinetic', 'zed'),
     ('lunar', 'antelope'),
     ('mantic', 'bobcat'),
+    ('noble', 'caracal'),
 ])
 
 
diff --git a/hooks/charmhelpers/osplatform.py b/hooks/charmhelpers/osplatform.py
index 1ace468f..5d121866 100644
--- a/hooks/charmhelpers/osplatform.py
+++ b/hooks/charmhelpers/osplatform.py
@@ -9,19 +9,13 @@ def get_platform():
     will be returned (which is the name of the module).
     This string is used to decide which platform module should be imported.
     """
-    # linux_distribution is deprecated and will be removed in Python 3.7
-    # Warnings *not* disabled, as we certainly need to fix this.
-    if hasattr(platform, 'linux_distribution'):
-        tuple_platform = platform.linux_distribution()
-        current_platform = tuple_platform[0]
-    else:
-        current_platform = _get_platform_from_fs()
+    current_platform = _get_current_platform()
 
     if "Ubuntu" in current_platform:
         return "ubuntu"
     elif "CentOS" in current_platform:
         return "centos"
-    elif "debian" in current_platform:
+    elif "debian" in current_platform or "Debian" in current_platform:
         # Stock Python does not detect Ubuntu and instead returns debian.
         # Or at least it does in some build environments like Travis CI
         return "ubuntu"
@@ -36,6 +30,24 @@ def get_platform():
                            .format(current_platform))
 
 
+def _get_current_platform():
+    """Return the current platform information for the OS.
+
+    Attempts to lookup linux distribution information from the platform
+    module for releases of python < 3.7. For newer versions of python,
+    the platform is determined from the /etc/os-release file.
+    """
+    # linux_distribution is deprecated and will be removed in Python 3.7
+    # Warnings *not* disabled, as we certainly need to fix this.
+    if hasattr(platform, 'linux_distribution'):
+        tuple_platform = platform.linux_distribution()
+        current_platform = tuple_platform[0]
+    else:
+        current_platform = _get_platform_from_fs()
+
+    return current_platform
+
+
 def _get_platform_from_fs():
     """Get Platform from /etc/os-release."""
     with open(os.path.join(os.sep, 'etc', 'os-release')) as fin:
diff --git a/metadata.yaml b/metadata.yaml
index d9e56619..66e61ef6 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -16,11 +16,9 @@ description: |
   L2 connectivity on nova-compute services.
 docs: https://discourse.charmhub.io/t/neutron-openvswitch-docs-index/11001
 tags:
-- openstack
+  - openstack
 series:
-- jammy
-- lunar
-- mantic
+  - jammy
 extra-bindings:
   data:
 provides:
diff --git a/tests/bundles/jammy-antelope.yaml b/tests/bundles/jammy-antelope.yaml
index 8b279efe..81b1e68e 100644
--- a/tests/bundles/jammy-antelope.yaml
+++ b/tests/bundles/jammy-antelope.yaml
@@ -75,7 +75,7 @@ applications:
       enable-qos: True
     to:
       - '4'
-    channel: latest/edge
+    channel: 2024.1/edge
   keystone:
     charm: ch:keystone
     num_units: 1
@@ -83,7 +83,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '5'
-    channel: latest/edge
+    channel: 2024.1/edge
   glance:
     charm: ch:glance
     num_units: 1
@@ -91,7 +91,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '6'
-    channel: latest/edge
+    channel: 2024.1/edge
   neutron-openvswitch:
     charm: ../../neutron-openvswitch.charm
     options:
@@ -106,7 +106,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '7'
-    channel: latest/edge
+    channel: 2024.1/edge
   nova-compute:
     charm: ch:nova-compute
     num_units: 2
@@ -119,7 +119,7 @@ applications:
     to:
       - '8'
       - '9'
-    channel: latest/edge
+    channel: 2024.1/edge
   placement:
     charm: ch:placement
     num_units: 1
@@ -127,10 +127,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '10'
-    channel: latest/edge
-  vault-mysql-router:
-    charm: ch:mysql-router
-    channel: latest/edge
+    channel: 2024.1/edge
   vault:
     charm: ch:vault
     num_units: 1
@@ -147,7 +144,7 @@ applications:
     channel: latest/edge
   neutron-api-plugin-ovn:
     charm: ch:neutron-api-plugin-ovn
-    channel: latest/edge
+    channel: 2024.1/edge
   ovn-chassis:
     charm: ch:ovn-chassis
     options:
diff --git a/tests/bundles/jammy-bobcat.yaml b/tests/bundles/jammy-bobcat.yaml
index 2ec9e553..d0f72e00 100644
--- a/tests/bundles/jammy-bobcat.yaml
+++ b/tests/bundles/jammy-bobcat.yaml
@@ -75,7 +75,7 @@ applications:
       enable-qos: True
     to:
       - '4'
-    channel: latest/edge
+    channel: 2024.1/edge
   keystone:
     charm: ch:keystone
     num_units: 1
@@ -83,7 +83,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '5'
-    channel: latest/edge
+    channel: 2024.1/edge
   glance:
     charm: ch:glance
     num_units: 1
@@ -91,7 +91,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '6'
-    channel: latest/edge
+    channel: 2024.1/edge
   neutron-openvswitch:
     charm: ../../neutron-openvswitch.charm
     options:
@@ -106,7 +106,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '7'
-    channel: latest/edge
+    channel: 2024.1/edge
   nova-compute:
     charm: ch:nova-compute
     num_units: 2
@@ -119,7 +119,7 @@ applications:
     to:
       - '8'
       - '9'
-    channel: latest/edge
+    channel: 2024.1/edge
   placement:
     charm: ch:placement
     num_units: 1
@@ -127,10 +127,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '10'
-    channel: latest/edge
-  vault-mysql-router:
-    charm: ch:mysql-router
-    channel: latest/edge
+    channel: 2024.1/edge
   vault:
     charm: ch:vault
     num_units: 1
@@ -147,7 +144,7 @@ applications:
     channel: latest/edge
   neutron-api-plugin-ovn:
     charm: ch:neutron-api-plugin-ovn
-    channel: latest/edge
+    channel: 2024.1/edge
   ovn-chassis:
     charm: ch:ovn-chassis
     options:
diff --git a/tests/bundles/mantic-bobcat.yaml b/tests/bundles/jammy-caracal.yaml
similarity index 94%
rename from tests/bundles/mantic-bobcat.yaml
rename to tests/bundles/jammy-caracal.yaml
index 1a98ced9..554da77b 100644
--- a/tests/bundles/mantic-bobcat.yaml
+++ b/tests/bundles/jammy-caracal.yaml
@@ -1,7 +1,7 @@
 variables:
-  openstack-origin: &openstack-origin distro
+  openstack-origin: &openstack-origin cloud:jammy-caracal
 
-series: &series mantic
+series: &series jammy
 
 machines:
   0:
@@ -75,7 +75,7 @@ applications:
       enable-qos: True
     to:
       - '4'
-    channel: latest/edge
+    channel: 2024.1/edge
   keystone:
     charm: ch:keystone
     num_units: 1
@@ -83,7 +83,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '5'
-    channel: latest/edge
+    channel: 2024.1/edge
   glance:
     charm: ch:glance
     num_units: 1
@@ -91,7 +91,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '6'
-    channel: latest/edge
+    channel: 2024.1/edge
   neutron-openvswitch:
     charm: ../../neutron-openvswitch.charm
     options:
@@ -106,7 +106,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '7'
-    channel: latest/edge
+    channel: 2024.1/edge
   nova-compute:
     charm: ch:nova-compute
     num_units: 2
@@ -119,7 +119,7 @@ applications:
     to:
       - '8'
       - '9'
-    channel: latest/edge
+    channel: 2024.1/edge
   placement:
     charm: ch:placement
     num_units: 1
@@ -127,10 +127,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '10'
-    channel: latest/edge
-  vault-mysql-router:
-    charm: ch:mysql-router
-    channel: latest/edge
+    channel: 2024.1/edge
   vault:
     charm: ch:vault
     num_units: 1
@@ -147,7 +144,7 @@ applications:
     channel: latest/edge
   neutron-api-plugin-ovn:
     charm: ch:neutron-api-plugin-ovn
-    channel: latest/edge
+    channel: 2024.1/edge
   ovn-chassis:
     charm: ch:ovn-chassis
     options:
diff --git a/tests/bundles/lunar-antelope.yaml b/tests/bundles/noble-caracal.yaml
similarity index 95%
rename from tests/bundles/lunar-antelope.yaml
rename to tests/bundles/noble-caracal.yaml
index e379b0c3..046e571d 100644
--- a/tests/bundles/lunar-antelope.yaml
+++ b/tests/bundles/noble-caracal.yaml
@@ -1,7 +1,7 @@
 variables:
   openstack-origin: &openstack-origin distro
 
-series: &series lunar
+series: &series noble
 
 machines:
   0:
@@ -75,7 +75,7 @@ applications:
       enable-qos: True
     to:
       - '4'
-    channel: latest/edge
+    channel: 2024.1/edge
   keystone:
     charm: ch:keystone
     num_units: 1
@@ -83,7 +83,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '5'
-    channel: latest/edge
+    channel: 2024.1/edge
   glance:
     charm: ch:glance
     num_units: 1
@@ -91,7 +91,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '6'
-    channel: latest/edge
+    channel: 2024.1/edge
   neutron-openvswitch:
     charm: ../../neutron-openvswitch.charm
     options:
@@ -106,7 +106,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '7'
-    channel: latest/edge
+    channel: 2024.1/edge
   nova-compute:
     charm: ch:nova-compute
     num_units: 2
@@ -119,7 +119,7 @@ applications:
     to:
       - '8'
       - '9'
-    channel: latest/edge
+    channel: 2024.1/edge
   placement:
     charm: ch:placement
     num_units: 1
@@ -127,10 +127,7 @@ applications:
       openstack-origin: *openstack-origin
     to:
       - '10'
-    channel: latest/edge
-  vault-mysql-router:
-    charm: ch:mysql-router
-    channel: latest/edge
+    channel: 2024.1/edge
   vault:
     charm: ch:vault
     num_units: 1
@@ -147,7 +144,7 @@ applications:
     channel: latest/edge
   neutron-api-plugin-ovn:
     charm: ch:neutron-api-plugin-ovn
-    channel: latest/edge
+    channel: 2024.1/edge
   ovn-chassis:
     charm: ch:ovn-chassis
     options:
diff --git a/tests/tests.yaml b/tests/tests.yaml
index a446bddf..64c6afde 100644
--- a/tests/tests.yaml
+++ b/tests/tests.yaml
@@ -6,16 +6,13 @@ charm_name: neutron-openvswitch
 # OVS to OVN.
 
 smoke_bundles:
-  - jammy-antelope
-
+  - jammy-caracal
 gate_bundles:
   - jammy-antelope
-
-dev_bundles:
   - jammy-bobcat
-  - lunar-antelope
-  - mantic-bobcat
-
+  - jammy-caracal
+dev_bundles:
+  - noble-caracal
 configure:
   - zaza.openstack.charm_tests.vault.setup.auto_initialize_no_validation
   - zaza.openstack.charm_tests.glance.setup.add_lts_image
@@ -57,5 +54,4 @@ tests_options:
   # allows verifying instances survive a SDN migration.
   zaza.openstack.charm_tests.neutron.tests.NeutronNetworkingTest.test_instances_have_networking.run_resource_cleanup: false
   force_deploy:
-    - lunar-antelope-dvr-snat
-    - mantic-bobcat-dvr-snat
+    - noble-caracal
diff --git a/tox.ini b/tox.ini
index 2cb6ca16..57c2f4ec 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,11 +32,13 @@ passenv =
     CS_*
     OS_*
     TEST_*
-deps = -r{toxinidir}/test-requirements.txt
+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
 
 [testenv:build]
 basepython = python3
-deps = -r{toxinidir}/build-requirements.txt
+deps =
 # charmcraft clean is done to ensure that
 # `tox -e build` always performs a clean, repeatable build.
 # For faster rebuilds during development,
@@ -49,12 +51,16 @@ commands =
 
 [testenv:py310]
 basepython = python3.10
-deps = -r{toxinidir}/requirements.txt
+deps =
+    -c {env:TEST_CONSTRAINTS_FILE:https://raw.githubusercontent.com/openstack-charmers/zaza-openstack-tests/master/constraints/constraints-2024.1.txt}
+    -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
 [testenv:py3]
 basepython = python3
-deps = -r{toxinidir}/requirements.txt
+deps =
+    -c {env:TEST_CONSTRAINTS_FILE:https://raw.githubusercontent.com/openstack-charmers/zaza-openstack-tests/master/constraints/constraints-2024.1.txt}
+    -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
 [testenv:pep8]
@@ -68,7 +74,9 @@ commands = flake8 {posargs} hooks unit_tests tests actions lib files
 # Technique based heavily upon
 # https://github.com/openstack/nova/blob/master/tox.ini
 basepython = python3
-deps = -r{toxinidir}/requirements.txt
+deps =
+    -c {env:TEST_CONSTRAINTS_FILE:https://raw.githubusercontent.com/openstack-charmers/zaza-openstack-tests/master/constraints/constraints-2024.1.txt}
+    -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 setenv =
     {[testenv]setenv}
diff --git a/unit_tests/test_neutron_ovs_context.py b/unit_tests/test_neutron_ovs_context.py
index 86e87bc2..21788b2f 100644
--- a/unit_tests/test_neutron_ovs_context.py
+++ b/unit_tests/test_neutron_ovs_context.py
@@ -198,6 +198,7 @@ class OVSPluginContextTest(CharmTestCase):
         }
         self.assertEqual(expect, napi_ctxt())
 
+    @patch.object(context, 'is_container')
     @patch.object(charmhelpers.contrib.openstack.utils,
                   'get_os_codename_package')
     @patch.object(charmhelpers.contrib.openstack.context, 'relation_get')
@@ -218,7 +219,8 @@ class OVSPluginContextTest(CharmTestCase):
                                                         _local_address,
                                                         _config, _runits,
                                                         _rids, _rget,
-                                                        _get_os_cdnm_pkg):
+                                                        _get_os_cdnm_pkg,
+                                                        _is_container):
         def mock_npa(plugin, section, manager):
             if section == "driver":
                 return "neutron.randomdriver"
@@ -243,6 +245,7 @@ class OVSPluginContextTest(CharmTestCase):
         }
         _rget.side_effect = lambda *args, **kwargs: rdata
         self.get_host_ip.return_value = '127.0.0.15'
+        _is_container.return_value = False
         napi_ctxt = context.OVSPluginContext()
         expect = {
             'distributed_routing': False,