diff --git a/src/parser/neu_json_tag.c b/src/parser/neu_json_tag.c
index b7e2b03d..fabce99c 100644
--- a/src/parser/neu_json_tag.c
+++ b/src/parser/neu_json_tag.c
@@ -467,17 +467,11 @@ int neu_json_decode_gtag_json(void *json_obj, neu_json_gtag_t *gtag_p)
     gtag_p->n_tag    = arr.len;
     gtag_p->tags     = arr.tags;
 
-    goto decode_exit;
+    return 0;
 
 decode_fail:
     free(gtag_elems[0].v.val_str);
     return -1;
-
-decode_exit:
-    if (json_obj != NULL) {
-        neu_json_decode_free(json_obj);
-    }
-    return 0;
 }
 
 void neu_json_decode_gtag_fini(neu_json_gtag_t *gtag)
diff --git a/tests/ft/driver/test_modbus.py b/tests/ft/driver/test_modbus.py
index 5f32623b..644881b6 100644
--- a/tests/ft/driver/test_modbus.py
+++ b/tests/ft/driver/test_modbus.py
@@ -1053,7 +1053,7 @@ class TestModbus:
             node=param[0], group='group', tag=hold_string_l1[0]['name'], value='a')
         api.write_tag_check(
             node=param[0], group='group', tag=hold_string_l2[0]['name'], value='b')
-        time.sleep(0.3)
+        time.sleep(0.5)
         assert 'a' == api.read_tag(
             node=param[0], group='group', tag=hold_string_l1[0]['name'])
         assert 'b' == api.read_tag(