Code review comment for lp://staging/~brendan-donegan/messaging-app/new_helpers_tests

102 + address_book = get_proxy_object_for_existing_process(
103 + pid=helpers.get_pid_by_name('address-book-app'))
104 + self.assertNotEqual(address_book, None)

we shouldn't add address book as a dependency to those tests.
what we should do is to check that url-dispatcher has received the right message.