diff --git a/.travis.yml b/.travis.yml
index b6c864e..1477872 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@ rvm:
   - 2.2.3
   - ruby-head
   - rbx-2
+  - truffleruby-head
 matrix:
   include: []
   allow_failures: