diff --git a/app/notify_client/service_api_client.py b/app/notify_client/service_api_client.py
index ecf7befe2..abc31446b 100644
--- a/app/notify_client/service_api_client.py
+++ b/app/notify_client/service_api_client.py
@@ -10,7 +10,7 @@ class ServiceAPIClient(NotifyAdminAPIClient):
         templates_for_service = self.get_service_templates(service_id)['data']
         if templates_for_service:
             redis_client.delete(*[
-                f"template-{x['id']}-version-None"
+                f"service-{service_id}-template-{x['id']}-version-None"
                 for x in templates_for_service
             ])
 
diff --git a/tests/app/notify_client/test_service_api_client.py b/tests/app/notify_client/test_service_api_client.py
index e21ae2dac..4a2ef83b8 100644
--- a/tests/app/notify_client/test_service_api_client.py
+++ b/tests/app/notify_client/test_service_api_client.py
@@ -550,5 +550,5 @@ def test_client_deletes_service_template_cache_when_service_is_updated(
     templates_to_delete = mock_redis_delete.call_args_list[0][0]
     assert len(templates_to_delete) == 6
     for template_key in templates_to_delete:
-        assert template_key.startswith('template-')
+        assert template_key.startswith(f'service-{SERVICE_ONE_ID}-template')
         assert template_key.endswith('version-None')