test_bitfields.py # bitfields not supported
test_byteswap.py  # __ctype_be__ and __ctypes_le__ not implemented
test_errcheck.py  # empty
test_init.py      # obscure
test_internals.py # uses gc.getrefcounts
test_keeprefs.py  # implementation details: ._objects
test_macholib.py  # OS X specific
test_objects.py   # implementation details: ._objects
test_python_api.py # CPython specific
test_refcounts.py  # CPython specific
test_repr.py       # not implemented
test_unaligned_structures.py # _pack_ not implemented
test_values.py     # some strange stuff
test_varsize_struct.py # resize not implemented
test_win32.py # Windows specific