diff --git a/.travis.yml b/.travis.yml
index 510cf45..9f3a3e0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ rvm:
   - 2.3.3
   - 2.4.0
   - jruby-9.1.12.0
+  - truffleruby-head
 matrix:
   allow_failures:
     - rvm: 1.8.7