Get stuff working on py3k for real
diff --git a/tests/test_utils.py b/tests/test_utils.py
index acb36d4..2822eb1 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -45,16 +45,16 @@
         ["key", "iv", "plaintext", "ciphertext"],
     ) == [
         (
-            "00000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "f34481ec3cc627bacd5dc3fb08f273e6",
-            "0336763e966d92595a567cc9ce537f5e",
+            b"00000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"f34481ec3cc627bacd5dc3fb08f273e6",
+            b"0336763e966d92595a567cc9ce537f5e",
         ),
         (
-            "00000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "9798c4640bad75c7c3227db910174e72",
-            "a9a1631bf4996954ebc093957b234589",
+            b"00000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"9798c4640bad75c7c3227db910174e72",
+            b"a9a1631bf4996954ebc093957b234589",
         ),
     ]
 
@@ -101,16 +101,16 @@
         ["key", "iv", "ciphertext", "plaintext"],
     ) == [
         (
-            "00000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "0336763e966d92595a567cc9ce537f5e",
-            "f34481ec3cc627bacd5dc3fb08f273e6",
+            b"00000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"0336763e966d92595a567cc9ce537f5e",
+            b"f34481ec3cc627bacd5dc3fb08f273e6",
         ),
         (
-            "00000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "a9a1631bf4996954ebc093957b234589",
-            "9798c4640bad75c7c3227db910174e72",
+            b"00000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"a9a1631bf4996954ebc093957b234589",
+            b"9798c4640bad75c7c3227db910174e72",
         ),
     ]
 
@@ -122,34 +122,34 @@
         ["key", "iv", "plaintext", "ciphertext"],
     ) == [
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "014730f80ac625fe84f026c60bfd547d",
-            "5c9d844ed46f9885085e5d6a4f94c7d7",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"014730f80ac625fe84f026c60bfd547d",
+            b"5c9d844ed46f9885085e5d6a4f94c7d7",
         ),
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "0b24af36193ce4665f2825d7b4749c98",
-            "a9ff75bd7cf6613d3731c77c3b6d0c04",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"0b24af36193ce4665f2825d7b4749c98",
+            b"a9ff75bd7cf6613d3731c77c3b6d0c04",
         ),
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "761c1fe41a18acf20d241650611d90f1",
-            "623a52fcea5d443e48d9181ab32c7421",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"761c1fe41a18acf20d241650611d90f1",
+            b"623a52fcea5d443e48d9181ab32c7421",
         ),
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "8a560769d605868ad80d819bdba03771",
-            "38f2c7ae10612415d27ca190d27da8b4",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"8a560769d605868ad80d819bdba03771",
+            b"38f2c7ae10612415d27ca190d27da8b4",
         ),
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "91fbef2d15a97816060bee1feaa49afe",
-            "1bc704f1bce135ceb810341b216d7abe",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"91fbef2d15a97816060bee1feaa49afe",
+            b"1bc704f1bce135ceb810341b216d7abe",
         ),
     ]
 
@@ -161,33 +161,33 @@
         ["key", "iv", "ciphertext", "plaintext"],
     ) == [
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "5c9d844ed46f9885085e5d6a4f94c7d7",
-            "014730f80ac625fe84f026c60bfd547d",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"5c9d844ed46f9885085e5d6a4f94c7d7",
+            b"014730f80ac625fe84f026c60bfd547d",
         ),
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "a9ff75bd7cf6613d3731c77c3b6d0c04",
-            "0b24af36193ce4665f2825d7b4749c98",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"a9ff75bd7cf6613d3731c77c3b6d0c04",
+            b"0b24af36193ce4665f2825d7b4749c98",
         ),
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "623a52fcea5d443e48d9181ab32c7421",
-            "761c1fe41a18acf20d241650611d90f1",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"623a52fcea5d443e48d9181ab32c7421",
+            b"761c1fe41a18acf20d241650611d90f1",
         ),
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "38f2c7ae10612415d27ca190d27da8b4",
-            "8a560769d605868ad80d819bdba03771",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"38f2c7ae10612415d27ca190d27da8b4",
+            b"8a560769d605868ad80d819bdba03771",
         ),
         (
-            "0000000000000000000000000000000000000000000000000000000000000000",
-            "00000000000000000000000000000000",
-            "1bc704f1bce135ceb810341b216d7abe",
-            "91fbef2d15a97816060bee1feaa49afe",
+            b"0000000000000000000000000000000000000000000000000000000000000000",
+            b"00000000000000000000000000000000",
+            b"1bc704f1bce135ceb810341b216d7abe",
+            b"91fbef2d15a97816060bee1feaa49afe",
         ),
     ]