Address pep8 concerns
diff --git a/tests/test_fernet.py b/tests/test_fernet.py
index f7c06b9..27d2418 100644
--- a/tests/test_fernet.py
+++ b/tests/test_fernet.py
@@ -1,5 +1,7 @@
 import base64
 
+import six
+
 from cryptography.fernet import Fernet
 
 
@@ -11,10 +13,10 @@
         token = f._encrypt_from_parts(
             b"hello",
             499162800,
-            b"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F",
+            b"".join(map(six.int2byte, range(16))),
         )
         assert token == (b"gAAAAAAdwJ6wAAECAwQFBgcICQoLDA0ODy021cpGVWKZ_eEwCGM"
-                          "4BLLF_5CV9dOPmrhuVUPgJobwOz7JcbmrR64jVmpU4IwqDA==")
+                         "4BLLF_5CV9dOPmrhuVUPgJobwOz7JcbmrR64jVmpU4IwqDA==")
 
     def test_verify(self):
         f = Fernet(base64.urlsafe_b64decode(
@@ -22,7 +24,7 @@
         ))
         payload = f.decrypt(
             (b"gAAAAAAdwJ6wAAECAwQFBgcICQoLDA0ODy021cpGVWKZ_eEwCGM4BLLF_5CV9dO"
-              "PmrhuVUPgJobwOz7JcbmrR64jVmpU4IwqDA=="),
+             "PmrhuVUPgJobwOz7JcbmrR64jVmpU4IwqDA=="),
             ttl=60,
             current_time=499162801
         )