Thanks @aaronjnewman. My first gut feeling is that this makes sense. I just enabled the CI to run the tests. Don't worry if the tests fail, we will work with you to fix any unrelated errors and understand why anything is failing due to the change.

I think you need to at least adjust this test:

mne_nirs/io/snirf/tests/test_snirf.py:79: in test_snirf_write_raw
    assert diffs == ""
E   assert "\n['subject_info']['first_name'] value mismatch (NIRX_Test, NIRX)" == ''
E     
E     + 
E     + ['subject_info']['first_name'] value mismatch (NIRX_Test, NIRX)

to check his_id now instead of first_name

I may have to defer to @rob-luke or others on this one - I'm not familiar with CI and not sure where this originates. I don't see any instance of first_name anywhere in the repository since my change was made.

Pushed a commit that should make sense alongside mne-tools/mne-python#12526. We should merge that then restart CIs here then things should be green 🤞

@aaronjnewman feel free to look to see if the two PRs make sense to you

@larsoner thanks - like many things, it's clear when I see it, but generating it myself would be a whole 'nother thing :) Appreciate the quick fix!

Thanks @aaronjnewman