diff --git a/.github/workflows/dev_pull_request.yml b/.github/workflows/dev_pull_request.yml
index 4239eb9d..293d60a0 100644
--- a/.github/workflows/dev_pull_request.yml
+++ b/.github/workflows/dev_pull_request.yml
@@ -49,6 +49,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: ror-community/validation-suite
+          ref: schema-2-1
           path: validation-suite
       - name: Validate files
         id: validatefiles