After upgrading ecdsa to 0.19.0 we are seeing failing tests on python-jose 3.3.0. FAILED tests/algorithms/test_EC_compat.py::TestBackendEcdsaCompatibility::test ...
My impression is that, although this test could have been useful in the past (mainly for debugging purposes), at this point we can comment it out if it is creating issues with PyPy and recent versions ...