diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 22d6603..3802e5e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,6 +9,11 @@ on:
   pull_request:
     branches: [ "main" ]
 
+# Allow one concurrent deployment
+concurrency:
+  group: "testing"
+  cancel-in-progress: true
+
 jobs:
   build: