patrys/httmock — pull request #11 by larryweya (2013-10-14 09:02:32+00:00)
Title: Allow real requests if return value from intercept is not a Response object

Seems like the _real_session_send will never be reached since intercept always returns a valid Response object. Our use-case is that we want to be able to run the same test against the actual target server in which case we just modify the net-loc.