diff --git a/doc/installation.rst b/doc/installation.rst
index a9f779c..0880d6f 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -48,6 +48,7 @@
     - sphinx
     - pyasn1
     - tox
+    - unittest2 (Python 2.x) or unittest2py3k (Python 3.x)
 
 Once these are installed, use Mercurial_ to get a copy of the source::
 
diff --git a/setup.cfg b/setup.cfg
index 510bfb6..fa9a7f6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,4 +1,3 @@
 [nosetests]
 verbosity=2
-with-doctest=1
 
diff --git a/tests/test__version200.py b/tests/test__version200.py
deleted file mode 100644
index 2a179a8..0000000
--- a/tests/test__version200.py
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-import unittest2
-from rsa._compat import b
-
-from rsa._version200 import int2bytes, bytes2int
-
-class Test_int2bytes(unittest2.TestCase):
-    def test_values(self):
-        self.assertEqual(int2bytes(123456789), b('\x07[\xcd\x15'))
-        self.assertEqual(bytes2int(int2bytes(123456789)), 123456789)