Index: Lib/test/test_mailbox.py
===================================================================
--- Lib/test/test_mailbox.py	(revision 63867)
+++ Lib/test/test_mailbox.py	(working copy)
@@ -848,6 +848,17 @@
         self.assert_(new_folder._factory is self._box._factory)
         self.assert_(folder0._factory is self._box._factory)
 
+    def test_get_message_with_sequences(self):
+        # Get a message that includes a list of sequence names
+        msg0 = mailbox.MHMessage(self._template % 0)
+        msg0.add_sequence('foo')
+        key0 = self._box.add(msg0)
+        msg = self._box.get_message(key0)
+        self.assert_(len(msg.get_sequences()) == 1)
+        self.assert_(msg.get_sequences()[0] == 'foo')
+        self.assert_(msg['from'] == 'foo')
+        self.assert_(msg.get_payload() == '0')
+
     def test_add_and_remove_folders(self):
         # Delete folders
         self._box.add_folder('one')