diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3d961e5..9c13f9b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby: ['3.0', '3.1', '3.2']
-        redis-version: [5, 6, 7]
+        redis-version: [4, 5, 6, 7]
 
     steps:
       - name: Checkout code