Modify default arguments in a plugin

[Stefanhg]

Hello,

I would like to always force the --capture=tee-sys parameter to be passed doing testing though a plugin. Is there a way to do this?
I have tried modifying it using pytest_cmdline_preparse

def pytest_cmdline_preparse(args):
    """ Forces test to always run with -s argument so output can be read while testing """
    args.expand(["--capture=tee-sys"])

I also tried to find a way to set the config.capture = "no" but it seems like it has already been loaded before the config is available:

pytest/src/_pytest/capture.py

Line 137 in 556e075

if ns.capture == "fd":

Any suggestions to an way of doing this?

[Stefanhg]

I have done some more playing around but still haven't found a solution that works.
There must be some way to interact with plugins.
I tried to use the pytest_load_initial_conftests hook and modify the config, but I just can't get it to execute before capture load it's plugin even with tryfirst=True and the capture.py hook with trylast=True it does not prioritize the hook.