diff --git a/builder_test.go b/builder_test.go
index 5b6bda8..3db1c17 100644
--- a/builder_test.go
+++ b/builder_test.go
@@ -27,6 +27,7 @@ func Test_dynamicStructImpl_New(t *testing.T) {
 		AddField("user.job.address", "", "", `json:"address"`, false).
 		AddField("user.job.company.name", "", "", `json:"name"`, false).
 		AddField("arr.[].item.name", "", "", `json:"name"`, false).
+		AddField("arr2.[].[].item.name", "", "", `json:"name"`, false).
 		Build()
 
 	val := instance.New()
@@ -39,7 +40,8 @@ func Test_dynamicStructImpl_New(t *testing.T) {
     "Slice": [1, 2, 3],
     "user": {"job":{"address":"beijing","company":{"name":"unknown"}}, "base":{"age": 1800, "name":"baicha"}},
     "Anonymous": "avoid to read",
-	"arr": [{"item":{"name":"item1","test":1}},{"item":{"name":"item2", "test":2}}]
+	"arr": [{"item":{"name":"item1","test":1}},{"item":{"name":"item2", "test":2}}],
+	"arr2": [[{"item":{"name":"item1","test":1}},{"item":{"name":"item2", "test":2}}]]
 }
 `)
 	tType := reflect.TypeOf(val)