diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..1ef2dea
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,9 @@
+language: python
+python:
+  - '2.7'
+  - '3.5'
+env:
+  - TOX_ENV=py2
+  - TOX_ENV=py3
+install: 'pip install tox'
+script: 'tox -e $TOX_ENV'
diff --git a/README.md b/README.md
index 4618f52..c6df1e1 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+[![Build Status](https://travis-ci.org/python-otr/pure-python-otr.svg?branch=master)](https://travis-ci.org/python-otr/pure-python-otr)
+
 Python OTR
 ==========
 This is a pure Python OTR implementation; it does not bind to libotr.
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..03917ad
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+PyCrypto >= 2.1
diff --git a/run_tests.sh b/run_tests.sh
new file mode 100755
index 0000000..49e3850
--- /dev/null
+++ b/run_tests.sh
@@ -0,0 +1,7 @@
+#!/bin/sh -eu
+
+# the directory that this script is in
+SRC_ROOT=$(cd -P $(dirname "$0") && pwd)
+export PYTHONPATH="$SRC_ROOT/src"
+
+python tests/testBasic.py
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..564b1e8
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,13 @@
+
+[tox]
+envlist = py3,py2
+
+[testenv]
+commands=./run_tests.sh
+deps= -r{toxinidir}/requirements.txt
+
+[testenv:py3]
+basepython = python3
+
+[testenv:py2]
+basepython = python2