1 files changed, 6 insertions, 0 deletions
diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index dbb05d780e..2ec14e555a 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -238,6 +238,9 @@ class _SentinelObject(object):
     def __repr__(self):
         return 'sentinel.%s' % self.name
 
+    def __reduce__(self):
+        return 'sentinel.%s' % self.name
+
 
 class _Sentinel(object):
     """Access attributes to return a named object, usable as a sentinel."""
@@ -250,6 +253,9 @@ class _Sentinel(object):
             raise AttributeError
         return self._sentinels.setdefault(name, _SentinelObject(name))
 
+    def __reduce__(self):
+        return 'sentinel'
+
 
 sentinel = _Sentinel()