'Set up VCR.
We use the VCR library to freeze API calls. Frozen calls are stored in
tests/fixtures/ for your convenience (otherwise your first test run
would take fooooorrr eeeevvveeerrrr). If you find that an API call has
drifted from our frozen version of it, simply remove that fixture file
and rerun. The VCR library should recreate the fixture with the new
information, and you can commit that with your updated tests.'

@classmethod
def setUpVCR(cls):

    cls.vcr_cassette = use_cassette(cls.__name__)
    cls.vcr_cassette.__enter__()
