diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 361b517..9db8f9d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,12 +6,16 @@ on:
     pull_request:
         branches: [master]
 
+concurrency:
+    group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+    cancel-in-progress: true
+
 jobs:
     test:
         strategy:
             matrix:
                 # TODO: return windows-latest, ubuntu-latest
-                os: [macos-latest]
+                os: [self-hosted-arc]
                 node-version: [20.x]
                 vscodeVersion:
                     - 1.93.0