diff --git a/ops-sunbeam/ops_sunbeam/charm.py b/ops-sunbeam/ops_sunbeam/charm.py
index 6ed70932..b636113e 100644
--- a/ops-sunbeam/ops_sunbeam/charm.py
+++ b/ops-sunbeam/ops_sunbeam/charm.py
@@ -203,7 +203,6 @@ class OSBaseOperatorCharm(ops.charm.CharmBase):
                 self.service_name,
                 self.container_configs,
                 self.template_dir,
-                self.openstack_release,
                 self.configure_charm,
             )
         ]
@@ -619,7 +618,6 @@ class OSBaseOperatorAPICharm(OSBaseOperatorCharm):
                 self.service_name,
                 self.container_configs,
                 self.template_dir,
-                self.openstack_release,
                 self.configure_charm,
                 f"wsgi-{self.service_name}",
             )
diff --git a/ops-sunbeam/ops_sunbeam/container_handlers.py b/ops-sunbeam/ops_sunbeam/container_handlers.py
index b830412e..5d18124f 100644
--- a/ops-sunbeam/ops_sunbeam/container_handlers.py
+++ b/ops-sunbeam/ops_sunbeam/container_handlers.py
@@ -60,7 +60,6 @@ class PebbleHandler(ops.charm.Object):
         service_name: str,
         container_configs: List[sunbeam_core.ContainerConfigFile],
         template_dir: str,
-        openstack_release: str,
         callback_f: Callable,
     ) -> None:
         """Run constructor."""
@@ -73,7 +72,6 @@ class PebbleHandler(ops.charm.Object):
         self.container_configs = container_configs
         self.container_configs.extend(self.default_container_configs())
         self.template_dir = template_dir
-        self.openstack_release = openstack_release
         self.callback_f = callback_f
         self.setup_pebble_handler()
 
@@ -120,7 +118,6 @@ class PebbleHandler(ops.charm.Object):
                     container,
                     config,
                     self.template_dir,
-                    self.openstack_release,
                     context,
                 )
                 if changed:
@@ -348,7 +345,6 @@ class WSGIPebbleHandler(PebbleHandler):
         service_name: str,
         container_configs: List[sunbeam_core.ContainerConfigFile],
         template_dir: str,
-        openstack_release: str,
         callback_f: Callable,
         wsgi_service_name: str,
     ) -> None:
@@ -359,7 +355,6 @@ class WSGIPebbleHandler(PebbleHandler):
             service_name,
             container_configs,
             template_dir,
-            openstack_release,
             callback_f,
         )
         self.wsgi_service_name = wsgi_service_name
diff --git a/ops-sunbeam/ops_sunbeam/templating.py b/ops-sunbeam/ops_sunbeam/templating.py
index cb7b651c..bc9a228b 100644
--- a/ops-sunbeam/ops_sunbeam/templating.py
+++ b/ops-sunbeam/ops_sunbeam/templating.py
@@ -50,7 +50,6 @@ def sidecar_config_render(
     container: "ops.model.Container",
     config: "sunbeam_core.ContainerConfigFile",
     template_dir: str,
-    openstack_release: str,
     context: "sunbeam_core.OPSCharmContexts",
 ) -> bool:
     """Render templates inside containers.
diff --git a/ops-sunbeam/unit_tests/test_charms.py b/ops-sunbeam/unit_tests/test_charms.py
index bcf69a34..21d6467d 100644
--- a/ops-sunbeam/unit_tests/test_charms.py
+++ b/ops-sunbeam/unit_tests/test_charms.py
@@ -138,7 +138,6 @@ resources:
 class MyCharm(sunbeam_charm.OSBaseOperatorCharm):
     """Test charm for testing OSBaseOperatorCharm."""
 
-    openstack_release = "diablo"
     service_name = "my-service"
 
     def __init__(self, framework: "ops.framework.Framework") -> None:
@@ -203,7 +202,6 @@ TEMPLATE_CONTENTS = """
 class MyAPICharm(sunbeam_charm.OSBaseOperatorAPICharm):
     """Test charm for testing OSBaseOperatorAPICharm."""
 
-    openstack_release = "diablo"
     service_name = "my-service"
     wsgi_admin_script = "/bin/wsgi_admin"
     wsgi_public_script = "/bin/wsgi_public"
@@ -304,7 +302,6 @@ class TestMultiSvcCharm(MyAPICharm):
                 self.service_name,
                 self.container_configs,
                 self.template_dir,
-                self.openstack_release,
                 self.configure_charm,
             )
         ]
diff --git a/ops-sunbeam/unit_tests/test_templating.py b/ops-sunbeam/unit_tests/test_templating.py
index 6551fce4..983af2fe 100644
--- a/ops-sunbeam/unit_tests/test_templating.py
+++ b/ops-sunbeam/unit_tests/test_templating.py
@@ -51,7 +51,7 @@ class TestTemplating(test_utils.CharmTestCase):
             {"testfile.txt": "debug = {{ debug }}"}
         )
         sunbeam_templating.sidecar_config_render(
-            container_mock, config, "/tmp/templates", "essex", {"debug": True}
+            container_mock, config, "/tmp/templates", {"debug": True}
         )
         container_mock.push.assert_called_once_with(
             "/tmp/testfile.txt",
@@ -77,6 +77,6 @@ class TestTemplating(test_utils.CharmTestCase):
             {"testfile.txt": "debug = {{ debug }}"}
         )
         sunbeam_templating.sidecar_config_render(
-            container_mock, config, "/tmp/templates", "essex", {"debug": True}
+            container_mock, config, "/tmp/templates", {"debug": True}
         )
         self.assertFalse(container_mock.push.called)