diff --git a/easywebdav/__version__.py b/easywebdav/__version__.py
index c68196d..bc86c94 100644
--- a/easywebdav/__version__.py
+++ b/easywebdav/__version__.py
@@ -1 +1 @@
-__version__ = "1.2.0"
+__version__ = "1.2.2"
diff --git a/easywebdav/client.py b/easywebdav/client.py
index 4003198..c6e4b81 100644
--- a/easywebdav/client.py
+++ b/easywebdav/client.py
@@ -1,17 +1,12 @@
+import six
 import requests
-import platform
 from numbers import Number
 import xml.etree.cElementTree as xml
 from collections import namedtuple
 
-py_majversion, py_minversion, py_revversion = platform.python_version_tuple()
+from six.moves.urllib_parse import urlparse
+from six.moves.http_client import responses as HTTP_CODES
 
-if py_majversion == '2':
-    from httplib import responses as HTTP_CODES
-    from urlparse import urlparse
-else:
-    from http.client import responses as HTTP_CODES
-    from urllib.parse import urlparse
 
 DOWNLOAD_CHUNK_SIZE_BYTES = 1 * 1024 * 1024
 
@@ -150,7 +145,7 @@ def delete(self, path):
         self._send('DELETE', path, 204)
 
     def upload(self, local_path_or_fileobj, remote_path):
-        if isinstance(local_path_or_fileobj, basestring):
+        if isinstance(local_path_or_fileobj, six.string_types):
             with open(local_path_or_fileobj, 'rb') as f:
                 self._upload(f, remote_path)
         else:
@@ -161,7 +156,7 @@ def _upload(self, fileobj, remote_path):
 
     def download(self, remote_path, local_path_or_fileobj):
         response = self._send('GET', remote_path, 200, stream=True)
-        if isinstance(local_path_or_fileobj, basestring):
+        if isinstance(local_path_or_fileobj, six.string_types):
             with open(local_path_or_fileobj, 'wb') as f:
                 self._download(f, response)
         else:
diff --git a/setup.py b/setup.py
index a2c8a3c..9233c7b 100644
--- a/setup.py
+++ b/setup.py
@@ -24,6 +24,7 @@
     data_files = [],
     install_requires=[
         "requests",
+        "six",
         ],
     entry_points=dict(
         console_scripts=[],
@@ -36,6 +37,7 @@
         "nose",
         "yanc",
         "PyWebDAV",
+        "unittest2",
         ))
 
 setup(**properties)
\ No newline at end of file
diff --git a/tests/__init__.py b/tests/__init__.py
index 44dad4c..7b9ec3d 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,5 +1,5 @@
 import os
-import unittest
+import unittest2
 import atexit
 import subprocess
 import inspect
@@ -14,7 +14,7 @@
 SERVER_USERNAME = 'testuser'
 SERVER_PASSWORD = SERVER_USERNAME
 SERVER_PORT = 28080
-SERVER_URL = 'http://localhost:{}'.format(SERVER_PORT)
+SERVER_URL = 'http://localhost:{0}'.format(SERVER_PORT)
 
 _initialized = False
 _init_failed = False
@@ -24,7 +24,7 @@
 def init():
     global _initialized, _init_failed, _server_process, _server_path, _client
     if _init_failed:
-        raise unittest.SkipTest('Test session initialization failed')
+        raise unittest2.SkipTest('Test session initialization failed')
     try:
         if _initialized:
             return
@@ -51,6 +51,7 @@ def init():
                 stdin=subprocess.PIPE,
                 )
         _server_process = subprocess.Popen(**process_props)
+        output('Start WebDAV with {0}...'.format(process_props))
         atexit.register(terminate_server)
 
         # Ensure server is running
@@ -96,7 +97,7 @@ def output(msg, *args, **kwargs):
         msg = msg.format(args, kwargs)
     print(msg)
 
-class TestCase(unittest.TestCase):
+class TestCase(unittest2.TestCase):
     def setUp(self):
         init()
         self.client = ClientProxy(self, _client)
@@ -174,6 +175,6 @@ def __call__(self, *args, **kwargs):
         result = self.__method__(*args, **kwargs)
         cwd_after = self.__client__.cwd
         self.__test__.assertEqual(cwd_before, cwd_after,
-            'CWD has changed during method "{}":\n  Before: {}\n  After:  {}'
+            'CWD has changed during method "{0}":\n  Before: {1}\n  After:  {2}'
             .format(self.__method__.__name__, cwd_before, cwd_after))
         return result
diff --git a/tests/tests.py b/tests/tests.py
index 173f9a6..ced6322 100644
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -1,11 +1,4 @@
-import platform
-
-python_version, _, __ = platform.python_version_tuple()
-if python_version == '2':
-    from StringIO import StringIO
-else:
-    from io import StringIO
-
+import six
 from . import TestCase
 
 class Tests(TestCase):
@@ -126,9 +119,9 @@ def test__download_absolute(self):
         self._assert_local_file(path, self.content)
     def test__download_stream(self):
         self._create_file('file', self.content)
-        sio = StringIO()
+        sio = six.BytesIO()
         self.client.download('file', sio)
-        self.assertEqual(self.content, sio.getvalue())
+        self.assertEqual(six.b(self.content), sio.getvalue())
 
     def test__upload(self):
         path = self._local_file(self.content)
@@ -146,8 +139,8 @@ def test__upload_nested_absolute(self):
         self.client.upload(path, '/two/file')
         self._assert_file('two/file', self.content)
     def test__upload_stream(self):
-        sio = StringIO()
-        sio.write(self.content)
+        sio = six.BytesIO()
+        sio.write(six.b(self.content))
         sio.seek(0)
         self.client.upload(sio, 'file')
         self._assert_file('file', self.content)
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..403ca29
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,13 @@
+# Tox (http://tox.testrun.org/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = py26, py27, py32, py33, py34, py35
+
+[testenv]
+commands = nosetests --nologcapture --nocapture tests
+deps = nose
+       PyWebDAV
+       unittest2