diff --git a/src/test_workflow/integ_test/integ_test_suite_opensearch_dashboards.py b/src/test_workflow/integ_test/integ_test_suite_opensearch_dashboards.py
index 9252ee37ba..006e1f9f14 100644
--- a/src/test_workflow/integ_test/integ_test_suite_opensearch_dashboards.py
+++ b/src/test_workflow/integ_test/integ_test_suite_opensearch_dashboards.py
@@ -84,6 +84,9 @@ def __setup_cluster_and_execute_test_config(self, config: str) -> int:
             self.additional_cluster_config = self.test_config.integ_test.get("additional-cluster-configs")
             logging.info(f"Additional config found: {self.additional_cluster_config}")
 
+        if self.additional_cluster_config is None:
+            self.additional_cluster_config = {}
+
         with LocalTestClusterOpenSearchDashboards.create(
             self.dependency_installer,
             self.dependency_installer_opensearch_dashboards,
diff --git a/tests/tests_test_workflow/test_integ_workflow/integ_test/.test_integ_test_suite_opensearch_dashboards.py.swp b/tests/tests_test_workflow/test_integ_workflow/integ_test/.test_integ_test_suite_opensearch_dashboards.py.swp
new file mode 100644
index 0000000000..717721711c
Binary files /dev/null and b/tests/tests_test_workflow/test_integ_workflow/integ_test/.test_integ_test_suite_opensearch_dashboards.py.swp differ
diff --git a/tests/tests_test_workflow/test_integ_workflow/integ_test/test_integ_test_suite_opensearch_dashboards.py b/tests/tests_test_workflow/test_integ_workflow/integ_test/test_integ_test_suite_opensearch_dashboards.py
index d6853e8ffd..f36b7b55c1 100644
--- a/tests/tests_test_workflow/test_integ_workflow/integ_test/test_integ_test_suite_opensearch_dashboards.py
+++ b/tests/tests_test_workflow/test_integ_workflow/integ_test/test_integ_test_suite_opensearch_dashboards.py
@@ -29,7 +29,11 @@ def setUp(self) -> None:
 
         self.test_config = MagicMock()
         self.test_config.working_directory = "test_working_directory"
-        self.test_config.integ_test = {"test-configs": ['with-security', 'without-security'], "additional-cluster-configs": {'server.host': '0.0.0.0'}}
+        self.test_config.integ_test = {"test-configs": ['with-security', 'without-security']}
+
+        self.test_config_additional_config = MagicMock()
+        self.test_config_additional_config.working_directory = "test_working_directory"
+        self.test_config_additional_config.integ_test = {"test-configs": ['with-security', 'without-security'], "additional-cluster-configs": {'server.host': '0.0.0.0'}}
 
         self.bundle_manifest_opensearch = MagicMock()
         self.bundle_manifest_opensearch.build.version = "1.2.0"
@@ -93,6 +97,58 @@ def test_execute_tests(self, mock_execute: Mock, mock_git: Mock, mock_test_resul
             call("test_endpoint", 1234, False, "without-security")
         ])
 
+        self.assertEqual(str(suite.additional_cluster_config), "{}")
+
+    @patch("os.chdir")
+    @patch("os.path.exists")
+    @patch("test_workflow.integ_test.integ_test_suite_opensearch_dashboards.TestResultData")
+    @patch("test_workflow.integ_test.integ_test_suite_opensearch_dashboards.GitRepository")
+    @patch("test_workflow.integ_test.integ_test_suite_opensearch_dashboards.execute", return_value=True)
+    def test_execute_tests_additional_config(self, mock_execute: Mock, mock_git: Mock, mock_test_result_data: Mock, mock_localTestClusterOSD: Mock, mock_path_exists: Mock, *mock: Any) -> None:
+        mock_find = MagicMock()
+        mock_find.return_value = "./integtest.sh"
+
+        ScriptFinder.find_integ_test_script = mock_find  # type: ignore
+
+        mock_git_object = MagicMock()
+        mock_git_object.dir = "https://test.github.com"
+        mock_git.return_value = mock_git_object
+
+        mock_execute.return_value = ("test_status", "test_stdout", "")
+
+        mock_test_result_data_object = MagicMock()
+        mock_test_result_data.return_value = mock_test_result_data_object
+
+        mock_path_exists.return_value = True
+
+        mock_create = MagicMock()
+        mock_create.return_value.__enter__.return_value = ("test_endpoint", 1234)
+        LocalTestClusterOpenSearchDashboards.create = mock_create  # type: ignore
+
+        suite = IntegTestSuiteOpenSearchDashboards(
+            self.dependency_installer_opensearch,
+            self.dependency_installer_opensearch_dashboards,
+            self.component,
+            self.test_config_additional_config,
+            self.bundle_manifest_opensearch,
+            self.bundle_manifest_opensearch_dashboards,
+            self.build_manifest_opensearch,
+            self.build_manifest_opensearch_dashboards,
+            self.work_dir,
+            self.test_recorder
+        )
+
+        mock_execute_integtest_sh = MagicMock()
+        suite.execute_integtest_sh = mock_execute_integtest_sh  # type: ignore
+
+        # call the test target
+        suite.execute_tests()
+
+        mock_execute_integtest_sh.assert_has_calls([
+            call("test_endpoint", 1234, True, "with-security"),
+            call("test_endpoint", 1234, False, "without-security")
+        ])
+
         self.assertEqual(str(suite.additional_cluster_config), "{'server.host': '0.0.0.0'}")
 
     # test base class