diff --git a/README.md b/README.md
index 7f008f2..629179d 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@ Make sure to verify (using `pwhois` or otherwise) that the WHOIS data for the do
 
 	./test.py update thedomain.com
 	
-### Running the full test suite
+### Running all tests
 
 	./test.py run all
 	
@@ -77,6 +77,10 @@ Make sure to verify (using `pwhois` or otherwise) that the WHOIS data for the do
 
 	./test.py run thedomain.com
 
+### Running the full test suite including support for multiple python versions
+
+    tox
+
 ### Generating documentation
 
 You need [ZippyDoc](http://cryto.net/zippydoc) (which can be installed through `pip install zippydoc`).
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..cd1c703
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,7 @@
+[tox]
+envlist = py26,py27,py33
+
+[testenv]
+usedevelop = True
+setenv = VIRTUAL_ENV={envdir}
+commands = python test.py run all