--- a/tests/test-newbranch	Sat Mar 10 17:36:27 2007 -0800
+++ b/tests/test-newbranch	Sat Mar 10 17:36:29 2007 -0800
@@ -63,3 +63,11 @@
     else:
         print "ValueError: %s" % inst
 EOF
+
+echo % update with no arguments: tipmost revision of the current branch
+hg up -q -C 0
+hg up -q
+hg id
+hg up -q 1
+hg up -q
+hg id