pyrox.dev
1diff --git a/unittest2/compatibility.py b/unittest2/compatibility.py
2index 9e5f1a5..473957c 100644
3--- a/unittest2/compatibility.py
4+++ b/unittest2/compatibility.py
5@@ -1,4 +1,5 @@
6 import collections
7+import collections.abc
8 import os
9 import sys
10
11@@ -140,7 +141,7 @@ except ImportError:
12 ### ChainMap (helper for configparser and string.Template)
13 ########################################################################
14
15-class ChainMap(collections.MutableMapping):
16+class ChainMap(collections.abc.MutableMapping):
17 ''' A ChainMap groups multiple dicts (or other mappings) together
18 to create a single, updateable view.
19