diff --git a/src/steps/common.py b/src/steps/common.py
index d7ba494..2af620e 100644
--- a/src/steps/common.py
+++ b/src/steps/common.py
@@ -118,3 +118,7 @@ class StepsCommon:
             default_target = [f"http://{self.main_nodes[1 + i % 2].name()}:18080"]
             proxy_client.run(input_values=default_target)
             self.client_nodes.append(proxy_client)
+
+    @pytest.fixture(params=["setup_2_node_cluster", "setup_4_node_cluster"])
+    def setup_cluster_variant(self, request):
+        return request.getfixturevalue(request.param)
diff --git a/tests/data_confidentiality/test_data_confidentiality.py b/tests/data_confidentiality/test_data_confidentiality.py
index fe57153..f3453ca 100644
--- a/tests/data_confidentiality/test_data_confidentiality.py
+++ b/tests/data_confidentiality/test_data_confidentiality.py
@@ -45,7 +45,7 @@ def modify_key_value(file_path, yaml_key_path):
 class TestDataConfidentiality(StepsDataAvailability):
     main_nodes = []
 
-    @pytest.mark.usefixtures("setup_2_node_cluster")
+    @pytest.mark.usefixtures("setup_cluster_variant")
     def test_unauthorized_node_cannot_receive_dispersed_data(self):
         self.disperse_data(DATA_TO_DISPERSE[1], to_app_id(1), to_index(0))
         delay(CONSENSUS_SLOT_TIME)