diff --git a/.gitignore b/.gitignore
index d4939536..9dbdc2de 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ __pycache__
 .DS_Store
 htmlcov/
 .cache/
+.tox/
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 00000000..33bee45e
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,5 @@
+[tox]
+envlist=py27,py33,py34,py35,pypy
+[testenv]
+deps=-rrequirements.txt
+commands=pytest tests {posargs}