diff -r 8ec2df32bd39 -r 542c891274b2 tests/test-manifest.py
--- a/tests/test-manifest.py	Mon Nov 17 00:00:25 2014 -0500
+++ b/tests/test-manifest.py	Fri Jan 30 21:30:40 2015 -0800
@@ -133,6 +133,10 @@
         self.assertRaises(KeyError, lambda : m['foo'])
         self.assertEqual(1, len(m))
         self.assertEqual(1, len(list(m)))
+        # now restore and make sure everything works right
+        m['foo'] = 'a' * 20, ''
+        self.assertEqual(2, len(m))
+        self.assertEqual(2, len(list(m)))
 
     def testManifestDiff(self):
         MISSING = (None, '')