With 8.8.b5:
less than 1 : 22
less than 2 : 30
less than 4 : 48
less than 8 : 52
less than 16 : 55
less than 64 : 56
In the 15 worst files, 102 broken doctests:
['src/sage/combinat/root_system/integrable_representations.py # 4 doctests failed',
'src/sage/combinat/set_partition.py # 4 doctests failed',
'src/sage/doctest/test.py # 4 doctests failed',
'src/sage/matroids/graphic_matroid.py # 4 doctests failed',
'src/sage/misc/functional.py # 4 doctests failed',
'src/sage/repl/attach.py # 4 doctests failed',
'src/sage/rings/polynomial/toy_buchberger.py # 4 doctests failed',
'src/sage/groups/perm_gps/permgroup.py # 6 doctests failed',
'src/sage/combinat/cluster_algebra_quiver/cluster_seed.py # 7 doctests failed',
'src/sage/combinat/root_system/weyl_group.py # 7 doctests failed',
'src/sage/graphs/generic_graph.py # 8 doctests failed',
'src/sage/misc/nested_class.pyx # 9 doctests failed',
'src/sage/rings/integer.pyx # 9 doctests failed',
'src/sage/symbolic/expression.pyx # 10 doctests failed',
'src/sage/matroids/matroid.pyx # 18 doctests failed']