diff --git a/.travis.yml b/.travis.yml
index 487c663..08dbbdf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,4 +8,5 @@ rvm:
   - 2.5.0
   - 2.6.0
   - 2.7.0
+  - truffleruby-head
 script: bundle exec rake