diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..ffe2fce
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+six
diff --git a/test-requirements.txt b/test-requirements.txt
index 3217365..d4f01f6 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,7 +2,6 @@ coverage>=3.6
 discover
 hacking>=0.5.6,<0.8
 mock
-six
 #unittest2
 python-subunit
 sphinx>=1.1.2,<1.2
diff --git a/tox.ini b/tox.ini
index 00ac095..37901b7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,8 @@ envlist = pep8, py26, py27, pypy, py33, py34
 setenv VIRTUAL_ENV={envdir}
 usedevelop = True
 install_command = pip install {opts} {packages}
-deps = -r{toxinidir}/test-requirements.txt
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
 commands = python setup.py testr --slowest --testr-args='{posargs}'
 
 [testenv:cover]
@@ -16,7 +17,8 @@ commands =
     coverage report --show-missing
 
 [testenv:py26]
-deps = -r{toxinidir}/test-requirements.txt
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
        unittest2
 
 [tox:jenkins]