diff --git a/dao/persondao.test.js b/dao/persondao.test.js
index 843c720299e3dcefe3918be65b859ea50f198ccc..333d4c1f67eafdc8ec41f3f7ef351a9de57a3ca0 100644
--- a/dao/persondao.test.js
+++ b/dao/persondao.test.js
@@ -112,3 +112,14 @@ test("get all persons from db", done => {
 
   personDao.getAll(callback);
 });
+
+test("fail this should", done => {
+    function callback(status, data) {
+        console.log(
+            "Test callback: status=" + status + ", data=" + JSON.stringify(data)
+        );
+        expect(data).toBe(1);
+        done();
+    }
+    callback(100, 2)
+});