diff --git a/tool/gabs_test.go b/tool/gabs_test.go
index b297837..5b2aa41 100644
--- a/tool/gabs_test.go
+++ b/tool/gabs_test.go
@@ -35,6 +35,7 @@ func TestDataFilter_FilterNormalData(t *testing.T) {
 			{SourceKey: "extra.age", MapKey: "user_age", DefaultValue: "18", WithDefault: true},
 			{SourceKey: "slice", MapKey: "user_index", DefaultValue: "[4,5,6]", WithDefault: true},
 			{SourceKey: "none", MapKey: "none_default", DefaultValue: map[string]interface{}{"a": "a"}, WithDefault: true},
+			{SourceKey: "extra", MapKey: "extra_object", DefaultValue: map[string]interface{}{"a": "a"}, WithDefault: true},
 		},
 	}
 	fmt.Println(df.Filter())