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Python 3.12 Test Summary

cf_xarray/tests/test_accessor.py::test_wrapped_classes[groupby_bins-xrkwargs4-cfkwargs4-obj3]: ValueError: Index string (0, 1, 2) does not match array dimension 2
cf_xarray/tests/test_accessor.py::test_wrapped_classes[groupby_bins-xrkwargs4-cfkwargs4-obj1]: ValueError: Index string (0, 1, 2) does not match array dimension 2
cf_xarray/tests/test_units.py::test_integer_units: AssertionError: assert '' == 'dimensionless'
  
  - dimensionless
cf_xarray/tests/test_units.py::test_udunits_format[kg ** 2-kg2]: AttributeError: 'NoneType' object has no attribute 'Unit'
cf_xarray/tests/test_units.py::test_udunits_format[m ** -1-m-1]: AttributeError: 'NoneType' object has no attribute 'Unit'
cf_xarray/tests/test_units.py::test_udunits_format[m ** 2 / s ** 2-m2 s-2]: AttributeError: 'NoneType' object has no attribute 'Unit'
cf_xarray/tests/test_units.py::test_udunits_format[m ** 3 / (kg * s ** 2)-m3 kg-1 s-2]: AttributeError: 'NoneType' object has no attribute 'Unit'