diff -up ecdsa-0.13/ecdsa/test_pyecdsa.py.noweak ecdsa-0.13/ecdsa/test_pyecdsa.py

--- ecdsa-0.13/ecdsa/test_pyecdsa.py.noweak	2015-02-07 11:16:22.000000000 -0700

+++ ecdsa-0.13/ecdsa/test_pyecdsa.py	2015-12-14 09:56:23.085656270 -0700

@@ -8,7 +8,7 @@ import subprocess

 from binascii import hexlify, unhexlify

 from hashlib import sha1, sha256, sha512

-from .six import b, print_, binary_type

+from six import b, print_, binary_type

 from .keys import SigningKey, VerifyingKey

 from .keys import BadSignatureError

 from . import util

@@ -331,10 +331,6 @@ class OpenSSL(unittest.TestCase):

     # vk: 3:OpenSSL->python  4:python->OpenSSL

     # sig: 5:OpenSSL->python 6:python->OpenSSL

-    def test_from_openssl_nist192p(self):

-        return self.do_test_from_openssl(NIST192p)

-    def test_from_openssl_nist224p(self):

-        return self.do_test_from_openssl(NIST224p)

     def test_from_openssl_nist256p(self):

         return self.do_test_from_openssl(NIST256p)

     def test_from_openssl_nist384p(self):

@@ -370,10 +366,6 @@ class OpenSSL(unittest.TestCase):

         sig = sk.sign(data)

         self.assertTrue(vk.verify(sig, data))

-    def test_to_openssl_nist192p(self):

-        self.do_test_to_openssl(NIST192p)

-    def test_to_openssl_nist224p(self):

-        self.do_test_to_openssl(NIST224p)

     def test_to_openssl_nist256p(self):

         self.do_test_to_openssl(NIST256p)

     def test_to_openssl_nist384p(self):