diff --git a/.github/workflows/on_pull_request.yml b/.github/workflows/on_pull_request.yml
index a02d1289a5..b749feaa55 100644
--- a/.github/workflows/on_pull_request.yml
+++ b/.github/workflows/on_pull_request.yml
@@ -305,7 +305,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        shard: [1/3, 2/3, 3/3]
+        shard: [1/4, 2/4, 3/4, 4/4]
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v3