diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 76923d7..648437d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,12 +18,15 @@ jobs:
 
       - name: Get dependencies
         run: go mod tidy
+      
+      - name: Enable Debug Log
+        run: sed -i '' 's/false/true/g' config/global.go
 
       - name: Build
         run: go build -v ./...
 
       - name: Test
-        run: sudo go test -ldflags "-X github.com/fumiama/WireGold/config.ShowDebugLog=true" $(go list ./...) # ip test needs sudo
+        run: sudo go test $(go list ./...) # ip test needs sudo
 
   lint:
     name: Lint
diff --git a/gold/p2p/tcp/tcp.go b/gold/p2p/tcp/tcp.go
index d197168..2c7c552 100644
--- a/gold/p2p/tcp/tcp.go
+++ b/gold/p2p/tcp/tcp.go
@@ -448,7 +448,9 @@ func (conn *Conn) WriteToPeer(b []byte, ep p2p.EndPoint) (n int, err error) {
 		return 0, errors.New("data size " + strconv.Itoa(len(b)) + " is too large")
 	}
 	if (!conn.suberr || len(conn.subs) > 0) && !conn.cplk.TryLock() {
-		logrus.Infoln("[tcp] try sub write")
+		if config.ShowDebugLog {
+			logrus.Debug("[tcp] try sub write to", tcpep)
+		}
 		n, err = conn.writeToPeer(b, tcpep, true) // try sub write
 		if err == nil {
 			return