diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
index 5df4f72..e018c57 100644
--- a/.github/workflows/check.yaml
+++ b/.github/workflows/check.yaml
@@ -9,6 +9,10 @@ on:
       - "**.md"
       - "**.rst"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   lint-unit:
     uses: canonical/bootstack-actions/.github/workflows/lint-unit.yaml@v2
@@ -18,7 +22,6 @@ jobs:
         python-version: ["3.8", "3.10"]
     with:
       python-version: ${{ matrix.python-version }}
-      tox-version: "<4"
       working-directory: ./src
 
   func:
@@ -28,8 +31,8 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - juju-channel: "3.1/stable"
-            command: "make functional"
+          - juju-channel: "3.4/stable"
+            command: "TEST_JUJU3=1 make functional"  # using TEST_JUJU3 due https://github.com/openstack-charmers/zaza/commit/af7eea953dd5d74d3d074fe67b5765dca3911ca6
     with:
       command: ${{ matrix.command }}
       juju-channel: ${{ matrix.juju-channel }}
@@ -37,4 +40,3 @@ jobs:
       provider: "lxd"
       python-version: "3.10"
       timeout-minutes: 120
-      tox-version: "<4"
diff --git a/Makefile b/Makefile
index cb4081c..d053e19 100644
--- a/Makefile
+++ b/Makefile
@@ -27,18 +27,15 @@ help:
 	@echo " make release - run clean, submodules, and build targets"
 	@echo " make lint - run flake8 and black --check"
 	@echo " make black - run black and reformat files"
-	@echo " make proof - run charm proof"
 	@echo " make unittests - run the tests defined in the unittest subdirectory"
 	@echo " make functional - run the tests defined in the functional subdirectory"
 	@echo " make test - run lint, proof, unittests and functional targets"
 	@echo ""
 
 clean:
-	@echo "Cleaning files"
-	@git clean -ffXd -e '!.idea'
-	@echo "Cleaning existing build"
-	@rm -rf ${CHARM_BUILD_DIR}/${CHARM_NAME}
+	@echo "Cleaning charmcraft"
 	@charmcraft clean
+	@echo "Cleaning existing chamr files"
 	@rm -rf ${PROJECTPATH}/${CHARM_NAME}.charm
 
 submodules:
@@ -48,15 +45,13 @@ submodules-update:
 	@git submodule update --init --recursive --remote --merge
 
 build: clean submodules-update
-	@echo "Building charm to directory ${CHARM_BUILD_DIR}/${CHARM_NAME}"
+	@echo "Building charm ${PROJECTPATH}/${CHARM_NAME}.charm"
 	@-git rev-parse --abbrev-ref HEAD > ./src/repo-info
 	@charmcraft -v pack ${BUILD_ARGS}
 	@bash -c ./rename.sh
-	@mkdir -p ${CHARM_BUILD_DIR}/${CHARM_NAME}
-	@unzip ${PROJECTPATH}/${CHARM_NAME}.charm -d ${CHARM_BUILD_DIR}/${CHARM_NAME}
 
 release: clean build
-	@echo "Charm is built at ${CHARM_BUILD_DIR}/${CHARM_NAME}"
+	@echo "Charm is built at ${PROJECTPATH}/${CHARM_NAME}.charm"
 
 lint:
 	@echo "Running lint checks"
@@ -66,17 +61,13 @@ black:
 	@echo "Reformat files with black"
 	@cd src && tox -e black
 
-proof: build
-	@echo "Running charm proof"
-	@charm proof ${CHARM_BUILD_DIR}/${CHARM_NAME}
-
 unittests:
 	@echo "Running unit tests"
 	@cd src && tox -e unit
 
 functional: build
-	@echo "Executing functional tests in ${CHARM_BUILD_DIR}"
-	@cd src && CHARM_LOCATION=${PROJECTPATH} tox -e func
+	@echo "Executing functional tests with ${PROJECTPATH}/${CHARM_NAME}.charm"
+	@cd src && CHARM_LOCATION=${PROJECTPATH} tox -e func -- ${FUNC_ARGS}
 
 test: lint proof unittests functional
 	@echo "Tests completed for charm ${CHARM_NAME}."
diff --git a/src/CONTRIB.md b/src/CONTRIB.md
index 842df2d..51ca9a3 100644
--- a/src/CONTRIB.md
+++ b/src/CONTRIB.md
@@ -49,9 +49,6 @@ make build
 charm build
 ```
 
-You can set various environment variables (e.g. JUJU_REPOSITORY, CHARM_BUILD_DIR) to build into 
-your desired directory. By default, the project will build into /tmp/charm-builds/duplicity. 
-
 ## Running Tests
 
 The following section will review running automated tests in the project.
diff --git a/src/metadata.yaml b/src/metadata.yaml
index f419771..425f00d 100644
--- a/src/metadata.yaml
+++ b/src/metadata.yaml
@@ -14,7 +14,6 @@ tags:
   # https://jujucharms.com/docs/stable/authors-charm-metadata
   - backup
 subordinate: true
-series: []
 provides:
   nrpe-external-master:
     interface: nrpe-external-master
diff --git a/src/requirements.txt b/src/requirements.txt
index 47e3c05..5d35e6e 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -2,3 +2,7 @@
 croniter
 pidfile
 fabric
+# NOTE(rgildein): The contextvars could not be installed without this requirement to be specified.
+setuptools>=42
+# NOTE(rgildein): The typing-extensions could not be installed without this requirement to be specified.
+flit-core>=3
diff --git a/src/tests/functional/requirements.txt b/src/tests/functional/requirements.txt
index f0a09b0..fc3c00a 100644
--- a/src/tests/functional/requirements.txt
+++ b/src/tests/functional/requirements.txt
@@ -1,4 +1,4 @@
 flake8
 mock
-git+https://github.com/openstack-charmers/zaza.git@libjuju-3.1#egg=zaza
+git+https://github.com/openstack-charmers/zaza.git@master#egg=zaza
 python-openstackclient
diff --git a/src/tests/functional/tests/bundles/base.yaml b/src/tests/functional/tests/bundles/base.yaml
index b84d3cd..0700e61 100644
--- a/src/tests/functional/tests/bundles/base.yaml
+++ b/src/tests/functional/tests/bundles/base.yaml
@@ -11,7 +11,7 @@ applications:
     charm: nrpe
 
   duplicity:
-    charm: /tmp/charm-builds/duplicity
+    charm: duplicity
     options:
       backend: file
       remote_backup_url: 'file:///home/ubuntu/somedir'
diff --git a/src/tests/functional/tests/configure.py b/src/tests/functional/tests/configure.py
index 1bbb104..419452b 100644
--- a/src/tests/functional/tests/configure.py
+++ b/src/tests/functional/tests/configure.py
@@ -22,9 +22,8 @@ def set_ssh_password_access_on_backup_host():
     """Configure ssh access with password on backup host."""
     backup_host_unit = _get_unit("backup-host")
     command = (
-        "sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/' "
-        "/etc/ssh/sshd_config && "
-        "service sshd reload"
+        'echo "PasswordAuthentication yes" > '
+        "/etc/ssh/sshd_config.d/01-test-settings.conf && service sshd reload"
     )
     result = zaza.model.run_on_unit(backup_host_unit.name, command, timeout=15)
     _check_run_result(result)
diff --git a/src/tox.ini b/src/tox.ini
index 226d06d..fd42aa5 100644
--- a/src/tox.ini
+++ b/src/tox.ini
@@ -21,16 +21,8 @@ passenv =
   NO_PROXY
   SNAP_HTTP_PROXY
   SNAP_HTTPS_PROXY
-  OS_REGION_NAME
-  OS_AUTH_VERSION
-  OS_AUTH_URL
-  OS_PROJECT_DOMAIN_NAME
-  OS_USERNAME
-  OS_PASSWORD
-  OS_PROJECT_ID
-  OS_USER_DOMAIN_NAME
-  OS_PROJECT_NAME
-  OS_IDENTITY_API_VERSION
+  OS_*
+  TEST_*
 
 [testenv:lint]
 commands =
@@ -84,5 +76,6 @@ deps = -r{toxinidir}/tests/unit/requirements.txt
 
 [testenv:func]
 changedir = {toxinidir}/tests/functional
-commands = functest-run-suite --keep-faulty-model {posargs}
-deps = -r{toxinidir}/tests/functional/requirements.txt
+commands = functest-run-suite {posargs:--keep-faulty-model}
+deps =
+  -r {toxinidir}/tests/functional/requirements.txt
diff --git a/src/wheelhouse.txt b/src/wheelhouse.txt
index e7a5072..c411668 100644
--- a/src/wheelhouse.txt
+++ b/src/wheelhouse.txt
@@ -1,3 +1,7 @@
 distro<1.7.0
 croniter
 pidfile
+# NOTE(rgildein): The contextvars could not be installed without this requirement to be specified.
+setuptools>=42
+# NOTE(rgildein): The typing-extensions could not be installed without this requirement to be specified.
+flit-core>=3