diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9452cc1..3c538d9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,6 +19,8 @@ jobs:
         include:
           - ruby: "ruby-head"
             experimental: true
+          - ruby: "truffleruby-head"
+            experimental: true
           - ruby: "jruby-head"
             experimental: true
           - ruby: "jruby-9.1.17.0"