diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3bd54e3..fd8e22f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,6 +21,7 @@ jobs:
           - ruby:3.0
           - ruby:3.1
           - ruby:3.2
+          - ruby:3.3
           - rubylang/ruby:master-nightly-bionic
         include:
           - ruby: rubylang/ruby:master-nightly-bionic