diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e9eb660..98a3583 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -53,7 +53,13 @@ jobs:
         run: tox -e unit
 
   integration-test:
-    name: Integration tests (LXD)
+    strategy:
+      fail-fast: true
+      matrix:
+        bases:
+          - ubuntu@20.04
+          - ubuntu@22.04
+    name: Integration tests (LXD) | ${{ matrix.bases }}
     runs-on: ubuntu-latest
     needs:
       - inclusive-naming-check
@@ -68,4 +74,4 @@ jobs:
           provider: lxd
           juju-channel: 3.1/stable
       - name: Run tests
-        run: tox -e integration
+        run: tox run -e integration -- --charm-base=${{ matrix.bases }}
diff --git a/tests/integration/conftest.py b/tests/integration/conftest.py
index a67a827..da6ce4e 100644
--- a/tests/integration/conftest.py
+++ b/tests/integration/conftest.py
@@ -17,12 +17,25 @@
 
 import pathlib
 
+import pytest
+from _pytest.config.argparsing import Parser
 from helpers import ETCD, NHC, VERSION
-from pytest import fixture
 from pytest_operator.plugin import OpsTest
 
 
-@fixture(scope="module")
+def pytest_addoption(parser: Parser) -> None:
+    parser.addoption(
+        "--charm-base", action="store", default="ubuntu@22.04", help="Charm base to test."
+    )
+
+
+@pytest.fixture(scope="module")
+def charm_base(request) -> str:
+    """Get slurmdbd charm base to use."""
+    return request.config.getoption("--charm-base")
+
+
+@pytest.fixture(scope="module")
 async def slurmrestd_charm(ops_test: OpsTest):
     """Slurmrestd charm used for integration testing."""
     charm = await ops_test.build_charm(".")
diff --git a/tests/integration/helpers.py b/tests/integration/helpers.py
index 9b21ee6..07beddd 100644
--- a/tests/integration/helpers.py
+++ b/tests/integration/helpers.py
@@ -36,10 +36,10 @@
 def get_slurmctld_res() -> Dict[str, pathlib.Path]:
     """Get slurmctld resources needed for charm deployment."""
     if not (version := pathlib.Path(VERSION)).exists():
-        logger.info(f"Setting resource {VERSION} to value {VERSION_NUM}...")
+        logger.info(f"Setting resource {VERSION} to value {VERSION_NUM}")
         version.write_text(VERSION_NUM)
     if not (etcd := pathlib.Path(ETCD)).exists():
-        logger.info(f"Getting resource {ETCD} from {ETCD_URL}...")
+        logger.info(f"Getting resource {ETCD} from {ETCD_URL}")
         request.urlretrieve(ETCD_URL, etcd)
 
     return {"etcd": etcd}
@@ -48,7 +48,7 @@ def get_slurmctld_res() -> Dict[str, pathlib.Path]:
 def get_slurmd_res() -> Dict[str, pathlib.Path]:
     """Get slurmd resources needed for charm deployment."""
     if not (nhc := pathlib.Path(NHC)).exists():
-        logger.info(f"Getting resource {NHC} from {NHC_URL}...")
+        logger.info(f"Getting resource {NHC} from {NHC_URL}")
         request.urlretrieve(NHC_URL, nhc)
 
     return {"nhc": nhc}
diff --git a/tests/integration/test_charm.py b/tests/integration/test_charm.py
index 06e1a8c..71b536b 100644
--- a/tests/integration/test_charm.py
+++ b/tests/integration/test_charm.py
@@ -27,7 +27,6 @@
 
 logger = logging.getLogger(__name__)
 
-SERIES = ["focal"]
 SLURMCTLD = "slurmctld"
 SLURMD = "slurmd"
 SLURMDBD = "slurmdbd"
@@ -38,14 +37,13 @@
 
 @pytest.mark.abort_on_fail
 @pytest.mark.skip_if_deployed
-@pytest.mark.parametrize("series", SERIES)
+@pytest.mark.order(1)
 async def test_build_and_deploy(
-    ops_test: OpsTest, slurmrestd_charm: Coroutine[Any, Any, pathlib.Path], series: str
+    ops_test: OpsTest, slurmrestd_charm: Coroutine[Any, Any, pathlib.Path], charm_base: str
 ) -> None:
     """Deploy minimal working slurmrestd charm."""
     res_slurmd = get_slurmd_res()
     res_slurmctld = get_slurmctld_res()
-
     await asyncio.gather(
         # Fetch from charmhub slurmctld
         ops_test.model.deploy(
@@ -54,7 +52,7 @@ async def test_build_and_deploy(
             channel="edge",
             num_units=1,
             resources=res_slurmctld,
-            series=series,
+            base=charm_base,
         ),
         ops_test.model.deploy(
             SLURMD,
@@ -62,45 +60,45 @@ async def test_build_and_deploy(
             channel="edge",
             num_units=1,
             resources=res_slurmd,
-            series=series,
+            base=charm_base,
         ),
         ops_test.model.deploy(
             SLURMDBD,
             application_name=SLURMDBD,
             channel="edge",
             num_units=1,
-            series=series,
+            base=charm_base,
         ),
         ops_test.model.deploy(
             str(await slurmrestd_charm),
             application_name=SLURMRESTD,
             num_units=1,
-            series=series,
+            base=charm_base,
         ),
         ops_test.model.deploy(
             ROUTER,
             application_name=f"{SLURMDBD}-{ROUTER}",
             channel="dpe/edge",
-            num_units=1,
-            series=series,
+            num_units=0,
+            base=charm_base,
         ),
         ops_test.model.deploy(
             DATABASE,
             application_name=DATABASE,
-            channel="edge",
+            channel="8.0/edge",
             num_units=1,
-            series="jammy",
+            base="ubuntu@22.04",
         ),
     )
     # Attach resources to charms.
     await ops_test.juju("attach-resource", SLURMCTLD, f"etcd={res_slurmctld['etcd']}")
     await ops_test.juju("attach-resource", SLURMD, f"nhc={res_slurmd['nhc']}")
     # Set relations for charmed applications.
-    await ops_test.model.relate(f"{SLURMCTLD}:{SLURMDBD}", f"{SLURMDBD}:{SLURMDBD}")
-    await ops_test.model.relate(f"{SLURMDBD}-{ROUTER}:backend-database", f"{DATABASE}:database")
-    await ops_test.model.relate(f"{SLURMDBD}:database", f"{SLURMDBD}-{ROUTER}:database")
-    await ops_test.model.relate(f"{SLURMRESTD}:slurmrestd", f"{SLURMCTLD}:slurmrestd")
-    await ops_test.model.add_relation(f"{SLURMD}:{SLURMD}", f"{SLURMCTLD}:{SLURMD}")
+    await ops_test.model.integrate(f"{SLURMCTLD}:{SLURMDBD}", f"{SLURMDBD}:{SLURMDBD}")
+    await ops_test.model.integrate(f"{SLURMDBD}-{ROUTER}:backend-database", f"{DATABASE}:database")
+    await ops_test.model.integrate(f"{SLURMDBD}:database", f"{SLURMDBD}-{ROUTER}:database")
+    await ops_test.model.integrate(f"{SLURMRESTD}:slurmrestd", f"{SLURMCTLD}:slurmrestd")
+    await ops_test.model.integrate(f"{SLURMD}:{SLURMD}", f"{SLURMCTLD}:{SLURMD}")
     # Reduce the update status frequency to accelerate the triggering of deferred events.
     async with ops_test.fast_forward():
         await ops_test.model.wait_for_idle(apps=[SLURMRESTD], status="active", timeout=1000)
@@ -108,6 +106,7 @@ async def test_build_and_deploy(
 
 
 @pytest.mark.abort_on_fail
+@pytest.mark.order(2)
 @tenacity.retry(
     wait=tenacity.wait.wait_exponential(multiplier=2, min=1, max=30),
     stop=tenacity.stop_after_attempt(3),
@@ -115,7 +114,7 @@ async def test_build_and_deploy(
 )
 async def test_munge_is_active(ops_test: OpsTest) -> None:
     """Test that munge is active."""
-    logger.info("Checking that munge is active inside Juju unit...")
+    logger.info("Checking that munge is active inside Juju unit")
     slurmctld_unit = ops_test.model.applications[SLURMCTLD].units[0]
     res = (await slurmctld_unit.ssh("systemctl is-active munge")).strip("\n")
     assert res == "active"
@@ -125,6 +124,7 @@ async def test_munge_is_active(ops_test: OpsTest) -> None:
 # systemd service failing. Error is "unable to get address" and "Temporary failure in
 # name resolution".
 @pytest.mark.xfail
+@pytest.mark.order(3)
 @tenacity.retry(
     wait=tenacity.wait.wait_exponential(multiplier=2, min=1, max=30),
     stop=tenacity.stop_after_attempt(3),
@@ -132,7 +132,7 @@ async def test_munge_is_active(ops_test: OpsTest) -> None:
 )
 async def test_slurmrestd_is_active(ops_test: OpsTest) -> None:
     """Test that slurmrestd is active."""
-    logger.info("Checking that slurmrestd is active inside Juju unit...")
+    logger.info("Checking that slurmrestd is active inside Juju unit")
     unit = ops_test.model.applications[SLURMRESTD].units[0]
     cmd_res = (await unit.ssh("systemctl is-active slurmrestd")).strip("\n")
     assert cmd_res == "active"
diff --git a/tox.ini b/tox.ini
index fee5cf1..7bee544 100644
--- a/tox.ini
+++ b/tox.ini
@@ -58,14 +58,14 @@ description = Run integration tests
 deps =
     juju==3.1.0.1
     pytest==7.2.0
-    pytest-operator==0.22.0
-    tenacity==8.1.0
+    pytest-operator==0.26.0
+    pytest-order==1.1.0
+    tenacity==8.2.2
+    -r{toxinidir}/requirements.txt
 commands =
     pytest -v \
-           -s \
-           --tb native \
-           --ignore={[vars]tst_path}unit \
-           --log-cli-level=INFO \
-           --model controller \
-           --keep-models \
-           {posargs}
+        -s \
+        --tb native \
+        --log-cli-level=INFO \
+        {[vars]tst_path}integration \
+        {posargs}