When executing 
./python -m test -v test_hashlib
on Python 3.7, the test fails.

This is the complete traceback:

CPython 3.7.0a0 (default, Feb 8 2017, 03:10:42) [GCC 5.4.0 20160609]
==   Linux-4.4.0-62-generic-x86_64-with-debian-stretch-sid little-endian
==   hash algorithm: siphash24 64bit
==  cwd: /XXX/build/test_python_14437
==  encodings: locale=UTF-8, FS=utf-8
Testing with flags: sys.flags(debug=0, inspect=0, interactive=0, optimize=0, dont_write_bytecode=0, no_user_site=0, no_site=0, ignore_environment=0, verbose=0, bytes_warning=0, quiet=0, hash_randomization=1, isolated=0)
Run tests sequentially
0:00:00 [1/1] test_hashlib
test_algorithms_available (test.test_hashlib.HashLibTestCase) ... ok
test_algorithms_guaranteed (test.test_hashlib.HashLibTestCase) ... ok
test_blake2b (test.test_hashlib.HashLibTestCase) ... ok
test_blake2b_vectors (test.test_hashlib.HashLibTestCase) ... ERROR
test_blake2s (test.test_hashlib.HashLibTestCase) ... ok
test_blake2s_vectors (test.test_hashlib.HashLibTestCase) ... ERROR
test_blocksize_name (test.test_hashlib.HashLibTestCase) ... ok
test_blocksize_name_blake2 (test.test_hashlib.HashLibTestCase) ... ok
test_blocksize_name_sha3 (test.test_hashlib.HashLibTestCase) ... ok
test_case_blake2b_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_blake2b_1 (test.test_hashlib.HashLibTestCase) ... ok
test_case_blake2s_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_blake2s_1 (test.test_hashlib.HashLibTestCase) ... ok
test_case_md5_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_md5_1 (test.test_hashlib.HashLibTestCase) ... ok
test_case_md5_2 (test.test_hashlib.HashLibTestCase) ... ok
test_case_md5_huge (test.test_hashlib.HashLibTestCase) ... skipped 'not enough memory: 4.0G minimum needed'
test_case_md5_uintmax (test.test_hashlib.HashLibTestCase) ... skipped 'not enough memory: 4.0G minimum needed'
test_case_sha1_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha1_1 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha1_2 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha1_3 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha224_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha224_1 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha224_2 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha224_3 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha256_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha256_1 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha256_2 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha256_3 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha384_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha384_1 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha384_2 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha384_3 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha3_224_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha3_224_vector (test.test_hashlib.HashLibTestCase) ... ERROR
test_case_sha3_256_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha3_256_vector (test.test_hashlib.HashLibTestCase) ... ERROR
test_case_sha3_384_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha3_384_vector (test.test_hashlib.HashLibTestCase) ... ERROR
test_case_sha3_512_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha3_512_vector (test.test_hashlib.HashLibTestCase) ... ERROR
test_case_sha512_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha512_1 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha512_2 (test.test_hashlib.HashLibTestCase) ... ok
test_case_sha512_3 (test.test_hashlib.HashLibTestCase) ... ok
test_case_shake128_vector (test.test_hashlib.HashLibTestCase) ... ERROR
test_case_shake256_vector (test.test_hashlib.HashLibTestCase) ... ERROR
test_case_shake_128_0 (test.test_hashlib.HashLibTestCase) ... ok
test_case_shake_256_0 (test.test_hashlib.HashLibTestCase) ... ok
test_extra_sha3 (test.test_hashlib.HashLibTestCase) ... ok
test_get_builtin_constructor (test.test_hashlib.HashLibTestCase) ... ok
test_gil (test.test_hashlib.HashLibTestCase) ... ok
test_hash_array (test.test_hashlib.HashLibTestCase) ... ok
test_hexdigest (test.test_hashlib.HashLibTestCase) ... ok
test_large_update (test.test_hashlib.HashLibTestCase) ... ok
test_name_attribute (test.test_hashlib.HashLibTestCase) ... ok
test_no_unicode (test.test_hashlib.HashLibTestCase) ... ok
test_no_unicode_blake2 (test.test_hashlib.HashLibTestCase) ... ok
test_no_unicode_sha3 (test.test_hashlib.HashLibTestCase) ... ok
test_threaded_hashing (test.test_hashlib.HashLibTestCase) ... ok
test_unknown_hash (test.test_hashlib.HashLibTestCase) ... ok
test_pbkdf2_hmac_c (test.test_hashlib.KDFTests) ... ok
test_pbkdf2_hmac_py (test.test_hashlib.KDFTests) ... ok
test_scrypt (test.test_hashlib.KDFTests) ... skipped '   test requires OpenSSL > 1.1'

======================================================================
ERROR: test_blake2b_vectors (test.test_hashlib.HashLibTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/XXX/Lib/test/test_hashlib.py", line 623, in test_blake2b_vectors
    for msg, key, md in read_vectors('blake2b'):
  File "/XXX/Lib/test/test_hashlib.py", line 69, in read_vectors
    parts[0] = bytes.fromhex(parts[0])
ValueError: non-hexadecimal number found in fromhex() arg at position 0

======================================================================
ERROR: test_blake2s_vectors (test.test_hashlib.HashLibTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/XXX/Lib/test/test_hashlib.py", line 648, in test_blake2s_vectors
    for msg, key, md in read_vectors('blake2s'):
  File "/XXX/Lib/test/test_hashlib.py", line 69, in read_vectors
    parts[0] = bytes.fromhex(parts[0])
ValueError: non-hexadecimal number found in fromhex() arg at position 0

======================================================================
ERROR: test_case_sha3_224_vector (test.test_hashlib.HashLibTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/XXX/Lib/test/test_hashlib.py", line 659, in test_case_sha3_224_vector
    for msg, md in read_vectors('sha3_224'):
  File "/XXX/Lib/test/test_hashlib.py", line 69, in read_vectors
    parts[0] = bytes.fromhex(parts[0])
ValueError: non-hexadecimal number found in fromhex() arg at position 0

======================================================================
ERROR: test_case_sha3_256_vector (test.test_hashlib.HashLibTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/XXX/Lib/test/test_hashlib.py", line 669, in test_case_sha3_256_vector
    for msg, md in read_vectors('sha3_256'):
  File "/XXX/Lib/test/test_hashlib.py", line 69, in read_vectors
    parts[0] = bytes.fromhex(parts[0])
ValueError: non-hexadecimal number found in fromhex() arg at position 0

======================================================================
ERROR: test_case_sha3_384_vector (test.test_hashlib.HashLibTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/XXX/Lib/test/test_hashlib.py", line 680, in test_case_sha3_384_vector
    for msg, md in read_vectors('sha3_384'):
  File "/XXX/Lib/test/test_hashlib.py", line 69, in read_vectors
    parts[0] = bytes.fromhex(parts[0])
ValueError: non-hexadecimal number found in fromhex() arg at position 0

======================================================================
ERROR: test_case_sha3_512_vector (test.test_hashlib.HashLibTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/XXX/Lib/test/test_hashlib.py", line 691, in test_case_sha3_512_vector
    for msg, md in read_vectors('sha3_512'):
  File "/XXX/Lib/test/test_hashlib.py", line 69, in read_vectors
    parts[0] = bytes.fromhex(parts[0])
ValueError: non-hexadecimal number found in fromhex() arg at position 0

======================================================================
ERROR: test_case_shake128_vector (test.test_hashlib.HashLibTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/XXX/Lib/test/test_hashlib.py", line 703, in test_case_shake128_vector
    for msg, md in read_vectors('shake_128'):
  File "/XXX/Lib/test/test_hashlib.py", line 69, in read_vectors
    parts[0] = bytes.fromhex(parts[0])
ValueError: non-hexadecimal number found in fromhex() arg at position 0

======================================================================
ERROR: test_case_shake256_vector (test.test_hashlib.HashLibTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/XXX/Lib/test/test_hashlib.py", line 715, in test_case_shake256_vector
    for msg, md in read_vectors('shake_256'):
  File "/XXX/Lib/test/test_hashlib.py", line 69, in read_vectors
    parts[0] = bytes.fromhex(parts[0])
ValueError: non-hexadecimal number found in fromhex() arg at position 0

----------------------------------------------------------------------
Ran 65 tests in 0.877s

FAILED (errors=8, skipped=3)
test test_hashlib failed
test_hashlib failed

1 test failed:
    test_hashlib

Total duration: 1 sec
Tests result: FAILURE