diff --git a/.travis.yml b/.travis.yml
index 23a0bd0..ae060c3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -43,6 +43,7 @@ matrix:
       gemfile: gemfiles/mongoid_40.gemfile
   allow_failures:
     - rvm: ruby-head
+    - rvm: rbx
     - gemfile: gemfiles/mongoid_40.gemfile
     - gemfile: gemfiles/active_record_edge.gemfile
   fast_finish: true