diff --git a/.gitignore b/.gitignore
index 5f9c3d7..4b57895 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 *.pyc
 build/
 dist/
+.tox/
 paramiko.egg-info/
 test.log
 docs/
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..75112a2
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+pycrypto
+tox
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..6cb8001
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,6 @@
+[tox]
+envlist = py25,py26,py27
+
+[testenv]
+commands = pip install --use-mirrors -q -r requirements.txt
+           python test.py