diff --git a/fastreid/evaluation/testing.py b/fastreid/evaluation/testing.py
index cf4abc3..5fe82c9 100644
--- a/fastreid/evaluation/testing.py
+++ b/fastreid/evaluation/testing.py
@@ -2,7 +2,8 @@
 import logging
 import pprint
 import sys
-from collections import Mapping, OrderedDict
+from collections import OrderedDict
+from collections.abc import Mapping
 
 import numpy as np
 from tabulate import tabulate