Note that simple tox works [ci skip]

tkf · tkf · commit 4e2c677011c2 · 2018-10-28T21:15:44.000-07:00
diff --git a/README.md b/README.md
@@ -366,6 +366,12 @@ parallel.
 Testing
 -------
 
+PyJulia can be tested by simply running [`tox`](http://tox.readthedocs.io):
+
+```console
+$ tox
+```
+
 The full syntax for invoking `tox` is
 
 ```shell
