Unittest incorrect result with argparse.ArgumentError in self asserRaises context

[piscvau]

BPO	44923
Nosy	@serhiy-storchaka, @iritkatriel
Files	bug_unittest_exception.py: reproduces the error

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2021-08-19.17:24:09.740>
created_at = <Date 2021-08-16.09:52:33.738>
labels = ['3.8', 'type-bug', 'tests', 'invalid']
title = 'Unittest incorrect result with argparse.ArgumentError in self asserRaises context'
updated_at = <Date 2021-08-19.17:24:09.739>
user = 'https://bugs.python.org/piscvau'

bugs.python.org fields:

activity = <Date 2021-08-19.17:24:09.739>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2021-08-19.17:24:09.740>
closer = 'serhiy.storchaka'
components = ['Tests']
creation = <Date 2021-08-16.09:52:33.738>
creator = 'piscvau'
dependencies = []
files = ['50222']
hgrepos = []
issue_num = 44923
keywords = []
message_count = 3.0
messages = ['399640', '399644', '399645']
nosy_count = 3.0
nosy_names = ['serhiy.storchaka', 'piscvau', 'iritkatriel']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44923'
versions = ['Python 3.8']

[piscvau]

When passed an Argparse.ArgumentError in the self.assertRaises context uniittest does not recognize the exception and raises an exception.
As a consequence the test fails whereas it should pass

[iritkatriel]

What is the output of the failed test?

[serhiy-storchaka]

You raise ArgumentTypeError, but expect ArgumentError. ArgumentTypeError is not a subclass of ArgumentError.