In Lib/test/test_argparse.py:

class TestHelpVersionOptional(HelpTestCase):
    """Test that the --version argument can be suppressed help messages"""

Assuming that the docstring means something like “. . . can be suppressed _in_ help messages”, the test is wrong, because the --version option is present in the expected output. Maybe it is missing a help=SUPPRESS option? Otherwise it seems this test class would be largely redundant with TestHelpVersionAction.

It also looks like the “version” attribute of the test classes is not used.

I think that your analysis is correct. Also, looks like the original test is problematic: https://code.google.com/p/argparse/source/browse/test/test_argparse.py#3710

Here is a patch to fix the test.

Patch looks sensible enough to me

Why the test class is moved?

> Why the test class is moved?

Just wanted to group all TestHelp* tests together.

But it already was between two help tests: TestHelpNoHelpOptional and TestHelpNone.

I think that original test tested that the help attribute is optional for the --version argument and default description is printed in help output. This test shouldn't be removed.

Serhiy, there is already a test for that:

class TestHelpVersionAction(HelpTestCase):
    """Test the default help for the version action"""

So I still think the test is redundant, unless it is made to exercise help=SUPPRESS, as Berker’s patch does.

I should agree with you. Then the patch LGTM.

New changeset 5b728310edac by Berker Peksag in branch '3.4':
Issue #23062: Add a test for suppressing --version with argparse.SUPPRESS.
https://hg.python.org/cpython/rev/5b728310edac

New changeset 157b59609cbd by Berker Peksag in branch 'default':
Issue #23062: Add a test for suppressing --version with argparse.SUPPRESS.
https://hg.python.org/cpython/rev/157b59609cbd