diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index d441c7b..c611df8 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -40,6 +40,7 @@ jobs:
         run: |
           git config --global user.email "fake@email.com"
           git config --global user.name "mr fake"
+          git config --global init.defaultBranch main
       - name: Install and initialize sapling on macos
         if: matrix.os == 'macos-latest'
         run: |