diff --git a/opensearchapi/opensearchapi_response_internal_test.go b/opensearchapi/opensearchapi_response_internal_test.go
index 2be9486bd..57fd6a96b 100644
--- a/opensearchapi/opensearchapi_response_internal_test.go
+++ b/opensearchapi/opensearchapi_response_internal_test.go
@@ -147,6 +147,15 @@ func TestAPIResponse(t *testing.T) {
 		if !errors.As(err, &errTest) {
 			t.Errorf("Expected error to be of type opensearchapi.Error: %T", err)
 		}
+		if errTest.Status != 400 ||
+			errTest.Err.Reason != "index [test/HU2mN_RMRXGcS38j3yV-VQ] already exists" ||
+			errTest.Err.Type != "resource_already_exists_exception" ||
+			len(errTest.Err.RootCause) != 1 ||
+			errTest.Err.RootCause[0].Type != "resource_already_exists_exception" ||
+			errTest.Err.RootCause[0].Reason != "index [test/HU2mN_RMRXGcS38j3yV-VQ] already exists" {
+
+			t.Errorf("Reponse Error was not parsed correctly")
+		}
 	})
 
 	t.Run("Warnings", func(t *testing.T) {