What is the type hint for the pytest fixture "capsys"?

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When writing pytest tests for a function that is supposed to print something to the console, to verify the output string I am using the capsys fixture and capsys.readouterr().
capsys
capsys.readouterr()
This is the code I am currently using:
@pytest.mark.parametrize(
"values,expected",
[
([], "guessed so far: \n"),
(["single one"], "guessed so far: single one\n"),
(["one", "two", "three", "4"], "guessed so far: 4, three, two, one\n"),
],
)
def test_print_guesses(capsys, values: list, expected: str) - None:
hm.print_guesses(values)
assert capsys.readouterr().out == expected

@pytest.mark.parametrize(
"values,expected",
[
([], "guessed so far: \n"),
(["single one"], "guessed so far: single one\n"),
(["one", "two", "three", "4"], "guessed so far: 4, three, two, one\n"),
],
)
def test_print_guesses(capsys, values: list, expected: str) - None:
hm.print_guesses(values)
assert capsys.readouterr().out == expected

I am also using the mypy extension in VS Code, so for now I am getting the warning:
Function is missing a type annotation for one or more arguments

Function is missing a type annotation for one or more arguments

I'd like to get rid of that. What is the appropriate type annotation for the capsys argument?
capsys


Tags: python,pytest,python-typing,mypySource of the question:
https://stackoverflow.com/questions/7...

Question and source license information:
https://meta.stackexchange.com/help/l...
https://stackoverflow.com/