Unable to log/capture pytest header in a file

[tilusnet]

pytest is nicely outputting a header like

==================================================================================== test session starts =====================================================================================
platform linux -- Python 3.9.13, pytest-7.1.2, pluggy-1.0.0
rootdir: ..., configfile: pytest.ini
plugins: timeout-2.1.0, cov-2.12.1

<header ends>
collected 5 items 
....

I find it impossible to get this header into a file.

pytest 2>&1 > my_file.txt doesn't work either.
Why?

[nicoddemus]

Hi @tilusnet,

Can't reproduce this on Windows:

λ pytest .tmp\test_foo.py 2>&1 > out.txt
λ cat out.txt
======================== test session starts ========================
platform win32 -- Python 3.9.8, pytest-7.2.0.dev91+g1689b3886.d20220613, pluggy-1.0.0
rootdir: e:\projects\pytest\.tmp, configfile: pytest.ini
plugins: hypothesis-6.34.1, flake8-1.0.7, flakes-4.0.5
collected 1 item

.tmp\test_foo.py .                                             [100%]

========================= 1 passed in 0.00s =========================

Also not sure why this wouldn't work on Linux.