Typically, on debian openssl has a stricter set of algorithms and hashes.
Some fixtures will make the test fail, like ec.dsa.
It might be a good idea to not test them, or to catch the error and not fail here:
https://github.com/crypto-browserify/browserify-sign/blob/44a10f6edf5df9dade14cf5600392417da6f966b/test/index.js#L66