diff --git a/MANIFEST.in b/MANIFEST.in
index 59aa5b001..304975404 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -10,6 +10,7 @@ exclude .mailmap
 exclude .travis.yml
 exclude pip/_vendor/Makefile
 exclude tox.ini
+exclude dev-requirements.txt
 
 recursive-include pip/_vendor *.pem
 recursive-include docs Makefile *.rst *.py *.bat
diff --git a/dev-requirements.txt b/dev-requirements.txt
new file mode 100644
index 000000000..dc578b7c3
--- /dev/null
+++ b/dev-requirements.txt
@@ -0,0 +1,10 @@
+https://github.com/spulec/freezegun/archive/master.zip#egg=freezegun
+pretend
+pytest
+pytest-capturelog
+pytest-cov
+pytest-timeout
+pytest-xdist
+mock
+scripttest>=1.3
+https://github.com/pypa/virtualenv/archive/develop.zip#egg=virtualenv
diff --git a/tox.ini b/tox.ini
index 33635e143..086f69f7a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,38 +1,22 @@
 [tox]
-envlist =
-    docs,packaging,pep8,py3pep8,py26,py27,py32,py33,py34,pypy
+envlist = docs, packaging, pep8, py3pep8, py26, py27, py32, py33, py34, pypy
 
 [testenv]
-deps =
-    https://github.com/spulec/freezegun/archive/master.zip#egg=freezegun
-    pretend
-    pytest
-    pytest-capturelog
-    pytest-cov
-    pytest-timeout
-    pytest-xdist
-    mock
-    scripttest>=1.3
-    https://github.com/pypa/virtualenv/archive/develop.zip#egg=virtualenv
-commands =
-    py.test --timeout 300 []
-install_command =
-    python -m pip install --pre {opts} {packages}
+deps = -r{toxinidir}/dev-requirements.txt
+commands = py.test --timeout 300 []
+install_command = python -m pip install --pre {opts} {packages}
 
 [testenv:py26]
-install_command =
-    pip install --pre {opts} {packages}
+install_command = pip install --pre {opts} {packages}
 
 [testenv:docs]
 deps = sphinx
 basepython = python2.7
-commands =
-    sphinx-build -W -b html -d {envtmpdir}/doctrees docs docs/_build/html
+commands = sphinx-build -W -b html -d {envtmpdir}/doctrees docs docs/_build/html
 
 [testenv:packaging]
 deps = check-manifest
-commands =
-    check-manifest
+commands = check-manifest
 
 [testenv:pep8]
 basepython = python2.7
@@ -44,7 +28,6 @@ basepython = python3.3
 deps = flake8
 commands = flake8 .
 
-
 [flake8]
 exclude = .tox,*.egg,build,_vendor,data
 select = E,W,F