1 files changed, 3 insertions, 1 deletions
diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index 0e77f0e489..1636073ff0 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -29,7 +29,7 @@ import inspect
 import pprint
 import sys
 import builtins
-from types import ModuleType
+from types import ModuleType, MethodType
 from unittest.util import safe_repr
 from functools import wraps, partial
 
@@ -122,6 +122,8 @@ def _copy_func_details(func, funcopy):
 def _callable(obj):
     if isinstance(obj, type):
         return True
+    if isinstance(obj, (staticmethod, classmethod, MethodType)):
+        return _callable(obj.__func__)
     if getattr(obj, '__call__', None) is not None:
         return True
     return False