Noticed it today: https://github.com/astropy/astropy/actions/runs/10554512360/job/29236483624

Most likely suspect:

• Clarify exception message for non-quantity input to ufuncs #16878 (Clarify exception message for non-quantity input to ufuncs #16878 (comment))

Affected tests:

• astropy/units/tests/test_quantity_erfa_ufuncs.py::TestPVUfuncs::test_s2p_not_all_quantity
• astropy/units/tests/test_quantity_erfa_ufuncs.py::TestGeodetic::test_unit_errors
• astropy/units/tests/test_quantity_ufuncs.py::TestQuantityTrigonometricFuncs::test_sin_with_quantity_out

Error:

  >       with pytest.raises(AttributeError, match="is treated as dimensionless"):
  E       AssertionError: Regex pattern did not match.
  E        Regex: 'is treated as dimensionless'
  E        Input: "'NoneType' object has no attribute 'get_converter'"

Does not bode well for #16879 but we need to understand why the behavior is different for these jobs only. They appear to be using Python 3.12.