diff --git a/.github/workflows/ruby-core.yml b/.github/workflows/ruby-core.yml
index 92f0213f7fd8..942c9dd8d085 100644
--- a/.github/workflows/ruby-core.yml
+++ b/.github/workflows/ruby-core.yml
@@ -23,21 +23,11 @@ jobs:
       matrix:
         target: [Rubygems, Bundler]
     steps:
-      - name: Set up latest ruby head
-        uses: ruby/setup-ruby@28c4deda893d5a96a6b2d958c5b47fc18d65c9d3 # v1.213.0
-        with:
-          ruby-version: head
-          bundler: none
-      - name: Save latest buildable revision to environment
-        run: echo "REF=$(ruby -v | cut -d')' -f1 | cut -d' ' -f5)" >> $GITHUB_ENV
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           repository: ruby/ruby
           path: ruby/ruby
-          fetch-depth: 10
-      - name: Checkout the latest buildable revision
-        run: git switch -c ${{ env.REF }}
-        working-directory: ruby/ruby
+          ref: v3_4_1
       - name: Install libraries
         run: |
           set -x