diff --git a/.gitignore b/.gitignore
index 73d3e4e..87590aa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,7 @@ lib
 lib64
 __pycache__
 /MANIFEST
+.tox
 
 # Installer logs.
 pip-log.txt
diff --git a/setup.py b/setup.py
index 5661d10..2debb3a 100644
--- a/setup.py
+++ b/setup.py
@@ -33,4 +33,5 @@
 	],
 	license=__license__,
 	packages=find_packages(),
+	test_suite='pathspec.tests.test_gitignore.GitIgnoreTest',
 )
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..3132be9
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,5 @@
+[tox]
+envlist = py27, py33, py34, pypy
+
+[testenv]
+commands = python setup.py test