diff --git a/cmd/yurt-tunnel-server/app/options/options.go b/cmd/yurt-tunnel-server/app/options/options.go
index 1833b576770..32b045a7471 100644
--- a/cmd/yurt-tunnel-server/app/options/options.go
+++ b/cmd/yurt-tunnel-server/app/options/options.go
@@ -127,9 +127,7 @@ func (o *ServerOptions) Config() (*config.Config, error) {
 	}
 
 	if o.CertDNSNames != "" {
-		for _, name := range strings.Split(o.CertDNSNames, ",") {
-			cfg.CertDNSNames = append(cfg.CertDNSNames, name)
-		}
+		cfg.CertDNSNames = append(cfg.CertDNSNames, strings.Split(o.CertDNSNames, ",")...)
 	}
 
 	if o.CertIPs != "" {
diff --git a/pkg/yurtmanager/controller/yurtappset/adapter/adapter_util.go b/pkg/yurtmanager/controller/yurtappset/adapter/adapter_util.go
index 5b51077965f..e62094596c4 100644
--- a/pkg/yurtmanager/controller/yurtappset/adapter/adapter_util.go
+++ b/pkg/yurtmanager/controller/yurtappset/adapter/adapter_util.go
@@ -84,9 +84,7 @@ func attachTolerations(podSpec *corev1.PodSpec, poolConfig *appsv1alpha1.Pool) {
 		podSpec.Tolerations = []corev1.Toleration{}
 	}
 
-	for _, toleration := range poolConfig.Tolerations {
-		podSpec.Tolerations = append(podSpec.Tolerations, toleration)
-	}
+	podSpec.Tolerations = append(podSpec.Tolerations, poolConfig.Tolerations...)
 
 	return
 }