More changes needed to make things work once bytes and str are truly divorced.
diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index 089323a..56f4600 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -41,9 +41,9 @@
 
 
     def test_large_update(self):
-        aas = 'a' * 128
-        bees = 'b' * 127
-        cees = 'c' * 126
+        aas = b'a' * 128
+        bees = b'b' * 127
+        cees = b'c' * 126
 
         for name in self.supported_hash_names:
             m1 = hashlib.new(name)
@@ -104,83 +104,83 @@
     # http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
 
     def test_case_sha224_0(self):
-        self.check('sha224', "",
+        self.check('sha224', b"",
           "d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f")
 
     def test_case_sha224_1(self):
-        self.check('sha224', "abc",
+        self.check('sha224', b"abc",
           "23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7")
 
     def test_case_sha224_2(self):
         self.check('sha224',
-          "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+          b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
           "75388b16512776cc5dba5da1fd890150b0c6455cb4f58b1952522525")
 
     def test_case_sha224_3(self):
-        self.check('sha224', "a" * 1000000,
+        self.check('sha224', b"a" * 1000000,
           "20794655980c91d8bbb4c1ea97618a4bf03f42581948b2ee4ee7ad67")
 
 
     def test_case_sha256_0(self):
-        self.check('sha256', "",
+        self.check('sha256', b"",
           "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
 
     def test_case_sha256_1(self):
-        self.check('sha256', "abc",
+        self.check('sha256', b"abc",
           "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")
 
     def test_case_sha256_2(self):
         self.check('sha256',
-          "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+          b"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
           "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1")
 
     def test_case_sha256_3(self):
-        self.check('sha256', "a" * 1000000,
+        self.check('sha256', b"a" * 1000000,
           "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0")
 
 
     def test_case_sha384_0(self):
-        self.check('sha384', "",
+        self.check('sha384', b"",
           "38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da"+
           "274edebfe76f65fbd51ad2f14898b95b")
 
     def test_case_sha384_1(self):
-        self.check('sha384', "abc",
+        self.check('sha384', b"abc",
           "cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed"+
           "8086072ba1e7cc2358baeca134c825a7")
 
     def test_case_sha384_2(self):
         self.check('sha384',
-                   "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+
-                   "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+                   b"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+
+                   b"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
           "09330c33f71147e83d192fc782cd1b4753111b173b3b05d22fa08086e3b0f712"+
           "fcc7c71a557e2db966c3e9fa91746039")
 
     def test_case_sha384_3(self):
-        self.check('sha384', "a" * 1000000,
+        self.check('sha384', b"a" * 1000000,
           "9d0e1809716474cb086e834e310a4a1ced149e9c00f248527972cec5704c2a5b"+
           "07b8b3dc38ecc4ebae97ddd87f3d8985")
 
 
     def test_case_sha512_0(self):
-        self.check('sha512', "",
+        self.check('sha512', b"",
           "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce"+
           "47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e")
 
     def test_case_sha512_1(self):
-        self.check('sha512', "abc",
+        self.check('sha512', b"abc",
           "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a"+
           "2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f")
 
     def test_case_sha512_2(self):
         self.check('sha512',
-                   "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+
-                   "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
+                   b"abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"+
+                   b"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu",
           "8e959b75dae313da8cf4f72814fc143f8f7779c6eb9f7fa17299aeadb6889018"+
           "501d289e4900f7e4331b99dec4b5433ac7d329eeb6dd26545e96e55b874be909")
 
     def test_case_sha512_3(self):
-        self.check('sha512', "a" * 1000000,
+        self.check('sha512', b"a" * 1000000,
           "e718483d0ce769644e2e42c7bc15b4638e1f98b13b2044285632a803afa973eb"+
           "de0ff244877ea60a4cb0432ce577c31beb009c5c2c49aa2e4eadb217ad8cc09b")