README.md in highline-3.1.0 vs README.md in highline-3.1.1

@@ -204,9 +204,12 @@
 7. Hack the source code, run the tests and __pronto__
   - ```rake test```
   - ```rake acceptance```
   - ```pronto run```
 
+  Alternatively, if you're in a [Docker](https://www.docker.com)ised environment,
+  don't care about installing anything locally -- just run `bin/test` instead.
+
 8. Commit your changes
   - ```git commit -am "Your commit message"```
 
 9. Push it
   - ```git push```