diff --git a/ocw/lib/aks.py b/ocw/lib/aks.py
index 18de9c00..38a9b4a7 100644
--- a/ocw/lib/aks.py
+++ b/ocw/lib/aks.py
@@ -53,4 +53,4 @@ def cleanup_k8s_namespaces(self):
         for cluster in clusters:
             self.log_info(f"Cleaning namespaces in AKS cluster {cluster['cluster_name']}")
             client = self.kubectl_client(cluster["resource_group"], cluster["cluster_name"]).CoreV1Api()
-            clean_namespaces(self, client, cluster["cluster_name"])
+            clean_namespaces(self, client)
diff --git a/ocw/lib/eks.py b/ocw/lib/eks.py
index 5feb8d62..6f7b6d46 100644
--- a/ocw/lib/eks.py
+++ b/ocw/lib/eks.py
@@ -172,4 +172,4 @@ def cleanup_k8s_namespaces(self):
             for cluster_name in clusters:
                 self.log_info(f"Cleaning namespaces in EKS cluster {cluster_name} in region {region}")
                 client = self.kubectl_client(region, cluster_name).CoreV1Api()
-                clean_namespaces(self, client, cluster_name)
+                clean_namespaces(self, client)
diff --git a/ocw/lib/gke.py b/ocw/lib/gke.py
index 97ca0dca..f3d2ccdc 100644
--- a/ocw/lib/gke.py
+++ b/ocw/lib/gke.py
@@ -74,4 +74,4 @@ def cleanup_k8s_namespaces(self):
                     cluster_name = cluster["name"]
                     self.log_info(f"Cleaning namespaces in GKE cluster {cluster_name} in zone {zone}")
                     client = self.kubectl_client(zone, cluster).CoreV1Api()
-                    clean_namespaces(self, client, cluster_name)
+                    clean_namespaces(self, client)
diff --git a/ocw/lib/k8s.py b/ocw/lib/k8s.py
index dfed0e8d..5bdc3f15 100644
--- a/ocw/lib/k8s.py
+++ b/ocw/lib/k8s.py
@@ -18,19 +18,19 @@ def clean_jobs(provider: Provider, client: BatchV1Api, cluster_name: str):
                                   f"with age {age} (days)")
 
 
-def clean_namespaces(provider: Provider, client: CoreV1Api, cluster_name: str):
+def clean_namespaces(provider: Provider, client: CoreV1Api):
     now = datetime.now(timezone.utc)
     # Retrieve the list of all namespaces
     namespaces = client.list_namespace(watch=False)
 
-    for ns in namespaces.items:
-        age = (now - ns.metadata.creation_timestamp).days
-        if ns.metadata.name.startswith('helm-test') and age > 7:
+    for namespace in namespaces.items:
+        age = (now - namespace.metadata.creation_timestamp).days
+        if namespace.metadata.name.startswith('helm-test') and age > 7:
             # Delete the namespace
             if provider.dry_run:
-                provider.log_info(f"Skip deleting namespace {ns.metadata.name} created {ns.metadata.creation_timestamp}")
+                provider.log_info(f"Skip deleting namespace {namespace.metadata.name} created {namespace.metadata.creation_timestamp}.")
             else:
-                provider.log_info(f"Deleting namespace {ns.metadata.name} created {ns.metadata.creation_timestamp}")
-                client.delete_namespace(ns.metadata.name)
+                provider.log_info(f"Deleting namespace {namespace.metadata.name} created {namespace.metadata.creation_timestamp}.")
+                client.delete_namespace(namespace.metadata.name)
         else:
-            provider.log_dbg(f"Namespace {ns.metadata.name} will be kept.")
+            provider.log_dbg(f"Namespace {namespace.metadata.name} will be kept.")