A few `TestZshGlobalExplicit` tests are failing after upgrade to zsh 5.9.0.3

[mgorny]

After upgrading zsh to 5.9.0.3, I'm seeing the following test failures:

$ python test/test.py TestZshGlobalExplicit
ss.......ss.FFFF..............
======================================================================
FAIL: test_python_completion (__main__.TestZshGlobalExplicit.test_python_completion)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/argcomplete/test/test.py", line 1348, in test_python_completion
    self.assertEqual(self.sh.run_command("python3 ./prog basic f\t"), "foo\r\n")
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: "usage: prog basic [-h] {foo,bar,baz}\r\nprog basic: error: argument arg: invalid choice: 'f' (choose from foo, bar, baz)\r\n" != 'foo\r\n'
+ foo
- usage: prog basic [-h] {foo,bar,baz}
- prog basic: error: argument arg: invalid choice: 'f' (choose from foo, bar, baz)


======================================================================
FAIL: test_python_filename_completion (__main__.TestZshGlobalExplicit.test_python_filename_completion)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/argcomplete/test/test.py", line 1352, in test_python_filename_completion
    self.assertEqual(self.sh.run_command("python3 ./pro\tbasic f\t"), "foo\r\n")
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: "usage: prog basic [-h] {foo,bar,baz}\r\nprog basic: error: argument arg: invalid choice: 'f' (choose from foo, bar, baz)\r\n" != 'foo\r\n'
+ foo
- usage: prog basic [-h] {foo,bar,baz}
- prog basic: error: argument arg: invalid choice: 'f' (choose from foo, bar, baz)


======================================================================
FAIL: test_python_module (__main__.TestZshGlobalExplicit.test_python_module)
Test completing a module run with python -m.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/argcomplete/test/test.py", line 1378, in test_python_module
    self.assertEqual(self.sh.run_command("python3 -m package.prog basic f\t"), "foo\r\n")
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: "usage: prog.py basic [-h] {foo,bar,baz}\r\nprog.py basic: error: argument arg: invalid choice: 'f' (choose from foo, bar, baz)\r\n" != 'foo\r\n'
+ foo
- usage: prog.py basic [-h] {foo,bar,baz}
- prog.py basic: error: argument arg: invalid choice: 'f' (choose from foo, bar, baz)


======================================================================
FAIL: test_python_not_executable (__main__.TestZshGlobalExplicit.test_python_not_executable)
Test completing a script that cannot be run directly.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/argcomplete/test/test.py", line 1368, in test_python_not_executable
    self.assertEqual(self.sh.run_command("python3 ./prog basic f\t"), "foo\r\n")
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: "usage: prog basic [-h] {foo,bar,baz}\r\nprog basic: error: argument arg: invalid choice: 'f' (choose from foo, bar, baz)\r\n" != 'foo\r\n'
+ foo
- usage: prog basic [-h] {foo,bar,baz}
- prog basic: error: argument arg: invalid choice: 'f' (choose from foo, bar, baz)


----------------------------------------------------------------------
Ran 30 tests in 37.798s

FAILED (failures=4, skipped=4)

I can reproduce atop fae5549 (3.6.3), with Python 3.13.9 and 3.11.14. The respective tests pass if I downgrade zsh to 5.9.