Change screenshot files name in Minitest and capybara-screenshot?

[Ju-Arrighi]

Is there a way to change the default screenshot default file name when using capybara-screenshot with minitest?

I'm using minitest and I have this file which contains spaces and colon. I should "clean" it to upload artifacts. I' ve tried to override it in my test_helper.rb with:
Capybara::Screenshot.register_filename_prefix_formatter(:rspec) do |example|
"screenshot_#{example.description.gsub(' ', '-').gsub(/^.*/spec//,'')}"
end

But nothing happens. Iḿ confused because it seems to me that capybara-screenshot is not working at all since the saved files still have /screenshots path besides /capybara path.

[Screenshot Image]: /home/julianaarrighi/code/xattering-backend/tmp/screenshots/failures_test_: when clicking the reset password email should allow to reset the AppUser's password. .png

Any ideas?