.travis.yml in adhearsion-2.2.1 vs .travis.yml in adhearsion-2.3.0

@@ -7,8 +7,9 @@
   - rbx-19mode
   - ruby-head
 matrix:
   allow_failures:
     - rvm: rbx-19mode
+    - rvm: ruby-head
 env: ARUBA_TIMEOUT=120 RAILS_ENV=development AHN_ENV=development
 notifications:
   irc: "irc.freenode.org#adhearsion"