jsonpickle fails autopkgtests with pandas 3.0 (in experimental):

https://ci.debian.net/packages/j/jsonpickle/unstable/amd64/73190624/

It looks like it's checking dtypes (pandas assert_frame_equal etc do
that by default), and not expecting the new string dtype.
Upstream release notes: https://pandas.pydata.org/docs/whatsnew/v3.0.0.html

  86s =================================== FAILURES
===================================
  86s ___________________________ test_dataframe_roundtrip