diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0cb80a0..afa11e4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,7 +17,6 @@ jobs:
           - macos
           - windows
         ruby:
-          - "2.5"
           - "2.6"
           - "2.7"
           - "3.0"
@@ -25,12 +24,12 @@ jobs:
           - "3.2"
           - "3.3"
           - "3.4"
+          - "4.0"
           - head
         include:
           - { os: windows , ruby: mingw }
           - { os: windows , ruby: mswin }
         exclude:
-          - { os: macos   , ruby: "2.5" }
           - { os: windows , ruby: head }
     steps:
       - uses: actions/checkout@v6