diff -r 3a7d9c0c57a5 -r c6cd4b8b76f8 tests/test-ancestor.py
--- a/tests/test-ancestor.py	Fri Nov 14 14:36:25 2014 -0800
+++ b/tests/test-ancestor.py	Fri Nov 14 14:50:03 2014 -0800
@@ -77,7 +77,8 @@
                                   inclusive=inclusive)
 
 def printlazyancestors(s, l):
-    print [n for n in l if n in s]
+    print 'membership: %r' % [n for n in l if n in s]
+    print 'iteration:  %r' % list(s)
 
 def test_lazyancestors():
     # Empty revs