diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 61d78702ded..e1165c4349f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,10 +18,10 @@ jobs:
     steps:
       - name: Set branch name
         id: vars
-        run: echo "branch=${{ github.repository_owner == 'Guovin' && 'gd' || 'master' }}" >> $GITHUB_ENV
+        run: echo "BRANCH_NAME=${{ github.repository_owner == 'Guovin' && 'gd' || 'master' }}" >> $GITHUB_ENV
       - uses: actions/checkout@v3
         with:
-          ref: ${{ steps.vars.outputs.branch }}
+          ref: ${{ env.BRANCH_NAME }}
       - name: Run with setup-python 3.11
         uses: actions/setup-python@v4
         with: