diff --git a/.github/workflows/pr-checks.yaml b/.github/workflows/pr-checks.yaml
index 636f27f..1313bcb 100644
--- a/.github/workflows/pr-checks.yaml
+++ b/.github/workflows/pr-checks.yaml
@@ -60,7 +60,7 @@ jobs:
       - name: Run chart-testing (list-changed)
         id: list-changed
         run: |
-          changed=$(ct list-changed --target-branch ${{ github.event.repository.default_branch }} --config ct.yaml)
+          changed=$(ct list-changed --target-branch master --config ct.yaml)
           if [[ -n "$changed" ]]; then
             echo "changed=true" >> $GITHUB_OUTPUT
           fi