diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 20dc0f3..41ad425 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -10,9 +10,9 @@ jobs:
         python: [3.8, 3.9, "3.10"]
     steps:
     - name: Check out code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
     - name: Install Dependencies
@@ -28,9 +28,9 @@ jobs:
         python: [3.5, 3.6, 3.7]
     steps:
     - name: Check out code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
     - name: Install Dependencies
@@ -41,19 +41,28 @@ jobs:
   functional-test:
     name: Functional test with LXD
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        juju: ["3", "2.9"]
     timeout-minutes: 360
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.8
+      - name: Constrain Tox Environment for juju 2.9
+        if: ${{ matrix.juju == '2.9' }}
+        run: |
+          echo "TEST_CONSTRAINTS_FILE=constraints-juju29.txt" >> $GITHUB_ENV
       - name: Install Dependencies
         run: |
           pip install tox
       - name: Setup operator environment
         uses: charmed-kubernetes/actions-operator@main
+        with:
+          juju-channel: ${{ matrix.juju }}/stable
       - name: Run test
         run: tox -e func
       - name: Show Status
@@ -65,4 +74,14 @@ jobs:
         if: ${{ always() }}
         run: |
           model=$(juju models --format yaml|grep "^- name:.*zaza"|cut -f2 -d/);
-          juju debug-log -m "$model" --replay --no-tail --level ERROR
+          mkdir tmp
+          juju debug-log -m "$model" --replay --no-tail --level ERROR | tee tmp/juju-debug-log.txt
+          juju status 2>&1 | tee tmp/juju-status.txt
+          juju-crashdump -s -m controller -a debug-layer -a config -o tmp/
+          juju-crashdump -s -m $model -a debug-layer -a config -o tmp/
+      - name: Upload debug artifacts
+        if: ${{ always() }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-run-artifacts-juju-${{ matrix.juju }}
+          path: tmp
diff --git a/.gitignore b/.gitignore
index 56e95aa..95a5086 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 .ropeproject
 .settings
 .tox
+*.charm
\ No newline at end of file
diff --git a/constraints-juju29.txt b/constraints-juju29.txt
new file mode 100644
index 0000000..8555898
--- /dev/null
+++ b/constraints-juju29.txt
@@ -0,0 +1 @@
+juju < 3.0
\ No newline at end of file
diff --git a/constraints-juju3.txt b/constraints-juju3.txt
new file mode 100644
index 0000000..ddd7961
--- /dev/null
+++ b/constraints-juju3.txt
@@ -0,0 +1 @@
+juju>3.0.0,<4.0.0
\ No newline at end of file
diff --git a/tests/bundles/minimal.yaml b/tests/bundles/minimal.yaml
index 4d6dd2b..4c9d941 100644
--- a/tests/bundles/minimal.yaml
+++ b/tests/bundles/minimal.yaml
@@ -15,11 +15,11 @@ applications:
     #num_units: 1
   minimal-focal:
     series: focal
-    charm: /tmp/charm-builds/minimal
+    charm: ../../minimal.charm
     num_units: 1
   minimal-binary-wheels-focal:
     series: focal
-    charm: /tmp/charm-builds/minimal-binary-wheels
+    charm: ../../minimal-binary-wheels.charm
     num_units: 1
   #minimal-no-venv-trusty:
     #series: trusty
@@ -35,5 +35,5 @@ applications:
     #num_units: 1
   minimal-no-venv-focal:
     series: focal
-    charm: /tmp/charm-builds/minimal-no-venv
+    charm: ../../minimal-no-venv.charm
     num_units: 1
diff --git a/tox.ini b/tox.ini
index b4057ae..fabb2f4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,9 @@ commands = flake8 reactive lib tests unit_tests
 
 [testenv:func]
 basepython = python3
-deps = -r{toxinidir}/test-requirements.txt
+deps = 
+  -c {env:TEST_CONSTRAINTS_FILE:constraints-juju3.txt}
+  -r{toxinidir}/test-requirements.txt
 allowlist_externals =
   /bin/bash
   /bin/ln
@@ -34,9 +36,9 @@ commands =
     /bin/mkdir -p /tmp/charm-builds/_tmp/layers
     /bin/bash -c '/bin/ln -sf $(readlink --canonicalize {toxinidir}) /tmp/charm-builds/_tmp/layers/layer-basic'
     /bin/bash -c '/bin/ln -sf $(readlink --canonicalize {toxinidir}/tests/charm-minimal) /tmp/charm-builds/_tmp/layers/charm-minimal'
-    charm-build --log-level DEBUG tests/charm-minimal
-    charm-build --log-level DEBUG --binary-wheels -n minimal-binary-wheels tests/charm-minimal
-    charm-build --log-level DEBUG tests/charm-minimal-no-venv
+    charm-build -F --log-level DEBUG tests/charm-minimal
+    charm-build -F --log-level DEBUG --binary-wheels -n minimal-binary-wheels tests/charm-minimal
+    charm-build -F --log-level DEBUG tests/charm-minimal-no-venv
     functest-run-suite --keep-model
 
 
diff --git a/wheelhouse.txt b/wheelhouse.txt
index 20a694f..ed3f9cf 100644
--- a/wheelhouse.txt
+++ b/wheelhouse.txt
@@ -32,10 +32,13 @@ setuptools-scm<=1.17.0;python_version < '3.8'
 setuptools-scm<7;python_version >= '3.8'
 flit_core<4.0.0;python_version >= '3.8'
 flit_scm<=1.7.0;python_version >= '3.8'
-anyio<3.7.0;python_version >= '3.8'
 charmhelpers>=0.4.0,<2.0.0
 charms.reactive>=0.1.0,<2.0.0
 wheel<0.34;python_version < '3.8'
 wheel<1.0;python_version >= '3.8'
 # pin netaddr to avoid pulling importlib-resources
 netaddr<=0.7.19
+
+# https://github.com/python-trio/sniffio/pull/49
+anyio<3.7.0;python_version >= '3.8'
+sniffio<1.3.1  # 1.3.1 requires setuptools>=64
\ No newline at end of file