.travis.yml in hexx-suit-2.2.1 vs .travis.yml in hexx-suit-2.2.2

@@ -5,5 +5,8 @@
   - '1.9.3'
   - '2.0'
   - '2.1'
   - '2.2'
   - ruby-head
+matrix:
+  allow_failures:
+    - rvm: ruby-head