Mention wwtd for testing against multiple Rubies

Closes thoughtbot#73
gregors · Dec 31, 2014 · f5d799d · f5d799d
1 parent dfe5955
commit f5d799d
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diff --git a/README.md b/README.md
@@ -139,6 +139,8 @@ all versions of its dependency, you might have to set a `script` setting:
 That will make sure that each of the test sub-job are not getting run more than
 one time.
 
+To run on all rubies / gemfiles, see [WWTD](https://github.com/grosser/wwtd)
+
 Credits
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