unittest.patch confuses modules with base modules

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-12-02.11:14:10.667>
labels = ['3.7', 'type-bug', 'library']
title = 'unittest.patch confuses modules with base modules'
updated_at = <Date 2021-07-17.14:15:49.350>
user = 'https://github.com/twolodzko'

bugs.python.org fields:

activity = <Date 2021-07-17.14:15:49.350>
actor = 'andrei.avk'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2020-12-02.11:14:10.667>
creator = 'twolodzko'
dependencies = []
files = []
hgrepos = []
issue_num = 42535
keywords = []
message_count = 2.0
messages = ['382303', '397723']
nosy_count = 3.0
nosy_names = ['xtreak', 'twolodzko', 'andrei.avk']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue42535'
versions = ['Python 3.7']