diff --git a/app.py b/app.py
index f61b5fa..225dfcb 100644
--- a/app.py
+++ b/app.py
@@ -1,92 +1,92 @@
 """
 Copyright (C) 2018 Kunal Mehta <legoktm@member.fsf.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Affero General Public License for more details.
 
 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 from collections import OrderedDict
 from debian import deb822
 from flask import Flask, render_template
 from flask_cache import Cache
 import os
 import re
 import requests
 import toolforge
 
 app = Flask(__name__)
 toolforge.set_user_agent('apt-browser')
 session = requests.Session()
 
 if os.path.exists('/etc/wmcs-instancename'):
     cache_conf = {
         'CACHE_TYPE': 'redis',
         'CACHE_KEY_PREFIX': 'apt-browser1',
         'CACHE_REDIS_HOST': 'tools-redis'
     }
 else:
     cache_conf = {}
 cache = Cache(app, config=cache_conf)
 
 
 @app.route('/')
 def index():
     distributions = dists()
     comp = {}
     for dist in distributions:
         comp[dist] = components(dist)
 
     return render_template('index.html', dists=distributions, components=comp)
 
 
 @app.route('/<dist>/<path:comp>/')
 def package_listing(dist, comp, arch='binary-amd64'):
     if dist not in dists():
         return 'Unknown distribution'
     if comp not in components(dist):
         return 'Unknown component'
     # TODO: validate arch?
     return render_template(
         'packages.html',
         dist=dist, comp=comp, arch=arch,
         packages=packages(dist, comp, arch)
     )
 
 
-@cache.cached(timeout=60*60)
+@cache.cached(timeout=60 * 60)
 def dists():
     r = session.get('https://apt.wikimedia.org/wikimedia/dists/')
     return [x[0] for x in re.findall('<a href="([a-z\-]*?)/">([a-z\-]*?)/</a>', r.text)]
 
 
-@cache.cached(timeout=60*60)
+@cache.cached(timeout=60 * 60)
 def components(dist):
     r = session.get('https://apt.wikimedia.org/wikimedia/dists/%s/Release' % dist)
     for item in deb822.Release.iter_paragraphs(r.text):
         return item['Components'].split(' ')
 
 
 @cache.cached(timeout=60)
 def packages(dist, component, arch='binary-amd64'):
     r = session.get('https://apt.wikimedia.org/wikimedia/dists/%s/%s/%s/Packages'
                     % (dist, component, arch))
 
     d = OrderedDict()
     for item in deb822.Packages.iter_paragraphs(r.text):
         d[item['Package']] = item['Version']
 
     return d
 
 
 if __name__ == '__main__':
     app.run(debug=True)
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..8065675
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,19 @@
+[tox]
+
+# Ensure 1.6+ is used to support 'skipsdist'
+minversion = 1.6
+
+# Do not run install command
+skipsdist = True
+
+# Environements to execute when invoking 'tox'
+envlist = py34,py35
+
+[testenv]
+commands = flake8
+deps = flake8
+
+[flake8]
+exclude = .tox
+max_line_length = 120
+ignore = F405