diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 279ebc48..c945bb88 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        ruby: ['3.0', '3.1', '3.2', '3.3']
+        ruby: ['3.1', '3.2', '3.3', '3.4.0-rc1'']
         include:
           - os: ubuntu-20.04
             ruby: '3.1'