diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 21ecace3..25f42113 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.0", "3.1", "3.2", "3.3"]
+        ruby: ["3.0", "3.1", "3.2", "3.3", "head"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4