diff --git a/.travis.yml b/.travis.yml
index b3cb770..2094915 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,9 @@ rvm:
   - ruby-head
 matrix:
   allow_failures:
-    - rvm: ruby-head
+    - rvm:
+      - rbx-19mode
+      - ruby-head
 before_script:
   - sudo ci/install_phantomjs
   - "export PATH=phantomjs/bin:$PATH"