diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 44789c19..daf661ef 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -140,20 +140,24 @@ jobs:
           EVENT_NAME: ${{ github.event_name }}
           HEAD_SHA: ${{ github.sha }}
           PR_BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
           PUSH_BEFORE_SHA: ${{ github.event.before }}
         run: |
           set -euo pipefail
           zero_sha="0000000000000000000000000000000000000000"
           if [[ "$EVENT_NAME" == "pull_request" && -n "$PR_BASE_SHA" ]]; then
             base_ref="$PR_BASE_SHA"
+            head_ref="$PR_HEAD_SHA"
           elif [[ -z "$PUSH_BEFORE_SHA" || "$PUSH_BEFORE_SHA" == "$zero_sha" ]]; then
             git fetch --no-tags --prune origin "$DEFAULT_BRANCH"
             base_ref="origin/$DEFAULT_BRANCH"
+            head_ref="$HEAD_SHA"
           else
             base_ref="$PUSH_BEFORE_SHA"
+            head_ref="$HEAD_SHA"
           fi
           echo "base=$base_ref" >> "$GITHUB_OUTPUT"
-          echo "head=$HEAD_SHA" >> "$GITHUB_OUTPUT"
+          echo "head=$head_ref" >> "$GITHUB_OUTPUT"
 
       - name: Setup Node.js
         uses: actions/setup-node@v5