diff --git a/.travis.yml b/.travis.yml
index be3eb2f..4d4e26c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,7 @@ rvm:
 - 2.5
 - 2.6
 - 2.7
+- truffleruby-head
 script: rake travis
 install: "" # avoid running default bundler install