Tests fail on python 3.7
Due to https://bugs.python.org/issue16285, the assumption at https://gitlab.com/sashahart/cookies/blob/ab8185e06f221eaf65305f15e05852393723ac95/test_cookies.py#L2228 is no longer true.
Due to https://bugs.python.org/issue16285, the assumption at https://gitlab.com/sashahart/cookies/blob/ab8185e06f221eaf65305f15e05852393723ac95/test_cookies.py#L2228 is no longer true.