diff --git a/README.md b/README.md
index ee584d8..059bcf1 100644
--- a/README.md
+++ b/README.md
@@ -161,8 +161,7 @@ def print_server_stats(stats):
 class StaticHandler(BaseHandler):
     def __init__(self, server_addr, peer, path, options, root, stats_callback):
         self._root = root
-        BaseHandler.__init__(
-            self, server_addr, peer, path, options, stats_callback)
+        super().__init__(server_addr, peer, path, options, stats_callback)
 
     def get_response_data(self):
         return FileResponseData(os.path.join(self._root, self._path))
@@ -172,8 +171,7 @@ class StaticServer(BaseServer):
                  handler_stats_callback, server_stats_callback=None):
         self._root = root
         self._handler_stats_callback = handler_stats_callback
-        BaseServer.__init__(
-            self, address, port, retries, timeout, server_stats_callback)
+        super().__init__(address, port, retries, timeout, server_stats_callback)
 
     def get_handler(self, server_addr, peer, path, options):
         return StaticHandler(
diff --git a/examples/server.py b/examples/server.py
index 9dc6758..7cd2757 100644
--- a/examples/server.py
+++ b/examples/server.py
@@ -61,9 +61,7 @@ def print_server_stats(stats):
 class StaticHandler(BaseHandler):
     def __init__(self, server_addr, peer, path, options, root, stats_callback):
         self._root = root
-        super(self.__class__, self).__init__(
-            server_addr, peer, path, options, stats_callback
-        )
+        super().__init__(server_addr, peer, path, options, stats_callback)
 
     def get_response_data(self):
         return FileResponseData(os.path.join(self._root, self._path))
@@ -82,9 +80,7 @@ def __init__(
     ):
         self._root = root
         self._handler_stats_callback = handler_stats_callback
-        super(self.__class__, self).__init__(
-            address, port, retries, timeout, server_stats_callback
-        )
+        super().__init__(address, port, retries, timeout, server_stats_callback)
 
     def get_handler(self, server_addr, peer, path, options):
         return StaticHandler(
diff --git a/fbtftp/__init__.py b/fbtftp/__init__.py
index 7c8b872..7e4cf67 100644
--- a/fbtftp/__init__.py
+++ b/fbtftp/__init__.py
@@ -9,4 +9,4 @@
 from .base_handler import BaseHandler, ResponseData, SessionStats
 from .base_server import BaseServer
 
-__all__ = [BaseHandler, BaseServer, ResponseData, SessionStats]
+__all__ = ['BaseHandler', 'BaseServer', 'ResponseData', 'SessionStats']
diff --git a/fbtftp/base_handler.py b/fbtftp/base_handler.py
index 94d3886..bb967cb 100644
--- a/fbtftp/base_handler.py
+++ b/fbtftp/base_handler.py
@@ -19,8 +19,8 @@
 from .netascii import NetasciiReader
 
 
-class ResponseData(object):
-    """A base class reprenting a file-like object"""
+class ResponseData:
+    """A base class representing a file-like object"""
 
     def read(self, n):
         raise NotImplementedError()
@@ -52,7 +52,7 @@ def close(self):
         pass
 
 
-class SessionStats(object):
+class SessionStats:
     """
     SessionStats represents a digest of what happened during a session.
     Data inside the object gets populated at the end of a session.
@@ -149,7 +149,7 @@ def __init__(self, server_addr, peer, path, options, stats_callback):
         self._listener = socket.socket(family, socket.SOCK_DGRAM)
 
         self._listener.bind((str(server_addr[0]), 0))
-        multiprocessing.Process.__init__(self)
+        super().__init__()
 
     def _on_close(self):
         """
diff --git a/fbtftp/base_server.py b/fbtftp/base_server.py
index bcdbdad..6897286 100644
--- a/fbtftp/base_server.py
+++ b/fbtftp/base_server.py
@@ -6,11 +6,6 @@
 # LICENSE file in the root directory of this source tree. An additional grant
 # of patent rights can be found in the PATENTS file in the same directory.
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import collections
 import logging
 import select
@@ -23,7 +18,7 @@
 from . import constants
 
 
-class ServerStats(object):
+class ServerStats:
     def __init__(self, server_addr=None, interval=None):
         """
         `ServerStats` represents a digest of what happened during the server's
@@ -156,7 +151,7 @@ def duration(self):
         return time.time() - self.start_time
 
 
-class BaseServer(object):
+class BaseServer:
     def __init__(
         self,
         address,
@@ -296,7 +291,7 @@ def on_new_data(self):
         data, peer = self._listener.recvfrom(constants.DEFAULT_BLKSIZE)
         code = struct.unpack('!H', data[:2])[0]
         if code != constants.OPCODE_RRQ:
-            logging.warn(
+            logging.warning(
                 'unexpected TFTP opcode %d, expected %d' %
                 (code, constants.OPCODE_RRQ)
             )
diff --git a/fbtftp/netascii.py b/fbtftp/netascii.py
index ca083b7..65175f3 100644
--- a/fbtftp/netascii.py
+++ b/fbtftp/netascii.py
@@ -9,7 +9,7 @@
 import io
 
 
-class NetasciiReader(object):
+class NetasciiReader:
     """
     NetasciiReader encodes data coming from a reader into NetASCII.
 
diff --git a/setup.py b/setup.py
index 8ff027f..43b395e 100644
--- a/setup.py
+++ b/setup.py
@@ -1,9 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
-from codecs import open
 from os import path
 from setuptools import setup, find_packages
 from setuptools.command.test import test as TestCommand
diff --git a/tests/base_handler_test.py b/tests/base_handler_test.py
index 6f5ac35..17caa5b 100644
--- a/tests/base_handler_test.py
+++ b/tests/base_handler_test.py
@@ -16,7 +16,7 @@
 from fbtftp import constants
 
 
-class MockSocketListener(object):
+class MockSocketListener:
     def __init__(self, network_queue, peer):
         self._network_queue = network_queue
         self._peer = peer
@@ -36,9 +36,7 @@ def __init__(
         network_queue=[]
     ):
         self.response = StringResponseData("foo")
-        super(self.__class__, self).__init__(
-            server_addr, peer, path, options, stats_callback
-        )
+        super().__init__(server_addr, peer, path, options, stats_callback)
         self._listener = MockSocketListener(network_queue, peer)
         self._listener.sendto = Mock()
         self._listener.close = Mock()
@@ -362,7 +360,7 @@ def testHandleTimeout(self):
         self.assertTrue(self.handler._should_stop)
 
     def testNextBlock(self):
-        class MockResponse(object):
+        class MockResponse:
             def __init__(self, dataiter):
                 self._dataiter = dataiter
 
diff --git a/tests/base_server_test.py b/tests/base_server_test.py
index a440cb8..b7fd616 100644
--- a/tests/base_server_test.py
+++ b/tests/base_server_test.py
@@ -15,7 +15,7 @@
 SELECT_EPOLLIN = 1
 
 
-class MockSocketListener(object):
+class MockSocketListener:
     def __init__(self, network_queue):
         self._network_queue = network_queue
 
@@ -39,9 +39,8 @@ def __init__(
         self, address, port, retries, timeout, root, stats_callback,
         stats_interval, network_queue
     ):
-        super(self.__class__, self).__init__(
-            address, port, retries, timeout, stats_callback,
-            stats_interval
+        super().__init__(
+            address, port, retries, timeout, stats_callback, stats_interval
         )
         self._root = root
         # mock the network
diff --git a/tests/integration_test.py b/tests/integration_test.py
index 9224774..f43694e 100644
--- a/tests/integration_test.py
+++ b/tests/integration_test.py
@@ -36,9 +36,7 @@ def close(self):
 class StaticHandler(BaseHandler):
     def __init__(self, server_addr, peer, path, options, root, stats_callback):
         self._root = root
-        super(self.__class__, self).__init__(
-            server_addr, peer, path, options, stats_callback
-        )
+        super().__init__(server_addr, peer, path, options, stats_callback)
 
     def get_response_data(self):
         return FileResponseData(os.path.join(self._root, self._path))
@@ -48,7 +46,7 @@ class StaticServer(BaseServer):
     def __init__(self, address, port, retries, timeout, root, stats_callback):
         self._root = root
         self._stats_callback = stats_callback
-        super(self.__class__, self).__init__(address, port, retries, timeout)
+        super().__init__(address, port, retries, timeout)
 
     def get_handler(self, server_addr, peer, path, options):
         return StaticHandler(
@@ -79,16 +77,14 @@ def busyboxClient(filename, blksize=1400, port=1069):
     return (stdout, stderr, p.returncode)
 
 
+@unittest.skipUnless(
+    find_executable('busybox'),
+    'busybox binary not present, install it if you want to run '
+    'integration tests'
+)
 class integrationTest(unittest.TestCase):
     def setUp(self):
         logging.getLogger().setLevel(logging.DEBUG)
-        # search for busybox on PATH, if not present we skip this integration
-        # test.
-        if not find_executable('busybox'):
-            self.skipTest(
-                'busybox binary not present, install it if you want to run '
-                'integration tests'
-            )
 
         self.tmpdirname = tempfile.TemporaryDirectory()
         logging.info("Created temporary directory %s" % self.tmpdirname)
diff --git a/tests/malformed_request_test.py b/tests/malformed_request_test.py
index 5e3446e..195c32c 100644
--- a/tests/malformed_request_test.py
+++ b/tests/malformed_request_test.py
@@ -32,7 +32,7 @@
 )
 
 
-class MockSocketListener(object):
+class MockSocketListener:
     def __init__(self, network_queue):
         self._network_queue = network_queue
 
@@ -50,7 +50,7 @@ def __init__(
         self, address, port, retries, timeout, root, stats_callback,
         network_queue
     ):
-        super(self.__class__, self).__init__(address, port, retries, timeout)
+        super().__init__(address, port, retries, timeout)
         self._root = root
         # mock the network
         self._listener = MockSocketListener(network_queue)