diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 02039b3..f3dd730 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -33,6 +33,8 @@ jobs:
       - run: go test ./...
       - name: Anti-flake check (vpnruntime)
         run: go test ./internal/vpnruntime -count=20
+      - name: Concurrency check (vpnruntime race)
+        run: go test -race ./internal/vpnruntime
 
   worker:
     runs-on: ubuntu-24.04