diff --git a/netbox/ipam/querysets.py b/netbox/ipam/querysets.py
index 771e9b3b9..77ab8194a 100644
--- a/netbox/ipam/querysets.py
+++ b/netbox/ipam/querysets.py
@@ -148,7 +148,7 @@ class VLANQuerySet(RestrictedQuerySet):
 
         # Find all relevant VLANGroups
         q = Q()
-        site = vm.site or vm.cluster.site
+        site = vm.site or vm.cluster._site
         if vm.cluster:
             # Add VLANGroups scoped to the assigned cluster (or its group)
             q |= Q(
diff --git a/netbox/ipam/tests/test_filtersets.py b/netbox/ipam/tests/test_filtersets.py
index 7bc372fbf..872a4e98a 100644
--- a/netbox/ipam/tests/test_filtersets.py
+++ b/netbox/ipam/tests/test_filtersets.py
@@ -1674,11 +1674,12 @@ class VLANTestCase(TestCase, ChangeLoggedFilterSetTests):
 
         cluster_type = ClusterType.objects.create(name='Cluster Type 1', slug='cluster-type-1')
         clusters = (
-            Cluster(name='Cluster 1', type=cluster_type, group=cluster_groups[0], site=sites[0]),
-            Cluster(name='Cluster 2', type=cluster_type, group=cluster_groups[1], site=sites[1]),
-            Cluster(name='Cluster 3', type=cluster_type, group=cluster_groups[2], site=sites[2]),
+            Cluster(name='Cluster 1', type=cluster_type, group=cluster_groups[0], scope=sites[0]),
+            Cluster(name='Cluster 2', type=cluster_type, group=cluster_groups[1], scope=sites[1]),
+            Cluster(name='Cluster 3', type=cluster_type, group=cluster_groups[2], scope=sites[2]),
         )
-        Cluster.objects.bulk_create(clusters)
+        for cluster in clusters:
+            cluster.save()
 
         virtual_machines = (
             VirtualMachine(name='Virtual Machine 1', cluster=clusters[0]),