diff --git a/.github/workflows/build-and-test-on-pr-open.yml b/.github/workflows/build-and-test-on-pr-open.yml
index dbf54c7..e5e892d 100644
--- a/.github/workflows/build-and-test-on-pr-open.yml
+++ b/.github/workflows/build-and-test-on-pr-open.yml
@@ -5,9 +5,12 @@ name: Build and Test on PR Open
 
 on:
   pull_request:
-    types: [ opened, reopened ]
+#    types: [ opened, reopened ]
     branches: [ "main" ]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
 
 jobs:
   build: