diff --git a/.github/workflows/acceptance.yml b/.github/workflows/acceptance.yml
index f63cd5edb..a2d2e1330 100644
--- a/.github/workflows/acceptance.yml
+++ b/.github/workflows/acceptance.yml
@@ -16,6 +16,11 @@ on:
   pull_request:
     branches: [ main, v*.x ]
 
+concurrency:
+    group: acceptance-${{ github.ref }}
+    cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
+
 jobs:
 
   build:
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index ff5e04e2a..2bd657f1e 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -2,6 +2,10 @@ name: Testing
 
 on: [push, pull_request]
 
+concurrency:
+    group: testing-${{ github.ref }}
+    cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
 jobs:
   test: