diff --git a/localstack-core/localstack/services/stores.py b/localstack-core/localstack/services/stores.py
index 2f42e8606dab4..8558746eec0c6 100644
--- a/localstack-core/localstack/services/stores.py
+++ b/localstack-core/localstack/services/stores.py
@@ -238,7 +238,7 @@ def __getitem__(self, region_name) -> BaseStoreType:
 
                 store_obj._global = self._global
                 store_obj._universal = self._universal
-                store_obj.service_name = self.service_name
+                store_obj._service_name = self.service_name
                 store_obj._account_id = self.account_id
                 store_obj._region_name = region_name
 
diff --git a/tests/unit/test_stores.py b/tests/unit/test_stores.py
index 307c4f3b70f52..b94b13439cc89 100644
--- a/tests/unit/test_stores.py
+++ b/tests/unit/test_stores.py
@@ -86,10 +86,12 @@ def test_store_namespacing(self, sample_stores):
         backend1_eu = sample_stores[account1][eu_region]
         assert backend1_eu._account_id == account1
         assert backend1_eu._region_name == eu_region
+        assert backend1_eu._service_name == "zzz"
 
         backend1_ap = sample_stores[account1][ap_region]
         assert backend1_ap._account_id == account1
         assert backend1_ap._region_name == ap_region
+        assert backend1_ap._service_name == "zzz"
 
         # Ensure region-specific data isolation
         backend1_eu.region_specific_attr.extend([1, 2, 3])