diff --git a/server.go b/server.go
index e4336a3..c6067f3 100644
--- a/server.go
+++ b/server.go
@@ -40,6 +40,13 @@ func init() {
 	gob.Register([]any{})
 }
 
+type ServerMuxInterface interface {
+	http.Handler
+
+	HandleFunc(pattern string, handler func(http.ResponseWriter, *http.Request))
+	Handle(pattern string, handler http.Handler)
+}
+
 const (
 	// HTTPStatusReloginRequired : http status를 이걸 받으면 클라이언트는 로그아웃하고 로그인 화면으로 돌아가야 한다.
 	HTTPStatusReloginRequired = 599
@@ -140,7 +147,7 @@ func isTlsEnabled(fileout ...*string) bool {
 }
 
 // NewHTTPServer :
-func NewHTTPServerWithPort(serveMux *http.ServeMux, port int) *Server {
+func NewHTTPServerWithPort(serveMux ServerMuxInterface, port int) *Server {
 	if isTlsEnabled() && port == 80 {
 		port = 443
 	}
@@ -157,7 +164,7 @@ func NewHTTPServerWithPort(serveMux *http.ServeMux, port int) *Server {
 	return server
 }
 
-func NewHTTPServer(serveMux *http.ServeMux) *Server {
+func NewHTTPServer(serveMux ServerMuxInterface) *Server {
 
 	// 시작시 자동으로 enable됨
 	if isTlsEnabled() && *portptr == 80 {
diff --git a/wshandler/wshandler.go b/wshandler/wshandler.go
index b4c3e95..2e56fe1 100644
--- a/wshandler/wshandler.go
+++ b/wshandler/wshandler.go
@@ -266,7 +266,7 @@ func (ws *WebsocketHandler) Cleanup() {
 	ws.connWaitGroup.Wait()
 }
 
-func (ws *WebsocketHandler) RegisterHandlers(serveMux *http.ServeMux, prefix string) error {
+func (ws *WebsocketHandler) RegisterHandlers(serveMux gocommon.ServerMuxInterface, prefix string) error {
 	url := gocommon.MakeHttpHandlerPattern(prefix, "ws")
 	if *noAuthFlag {
 		serveMux.HandleFunc(url, ws.upgrade_nosession)
diff --git a/wshandler/wshandler_peer.go b/wshandler/wshandler_peer.go
index 937c3ba..96e3ebc 100644
--- a/wshandler/wshandler_peer.go
+++ b/wshandler/wshandler_peer.go
@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"go.mongodb.org/mongo-driver/bson/primitive"
+	"repositories.action2quare.com/ayo/gocommon"
 	"repositories.action2quare.com/ayo/gocommon/logger"
 	"repositories.action2quare.com/ayo/gocommon/session"
 
@@ -18,7 +19,7 @@ import (
 )
 
 type WebsocketPeerHandler interface {
-	RegisterHandlers(serveMux *http.ServeMux, prefix string) error
+	RegisterHandlers(serveMux gocommon.ServerMuxInterface, prefix string) error
 }
 
 type peerCtorChannelValue struct {
@@ -164,7 +165,7 @@ func NewWebsocketPeerHandler[T PeerInterface](consumer session.Consumer, creator
 	return wsh
 }
 
-func (ws *websocketPeerHandler[T]) RegisterHandlers(serveMux *http.ServeMux, prefix string) error {
+func (ws *websocketPeerHandler[T]) RegisterHandlers(serveMux gocommon.ServerMuxInterface, prefix string) error {
 	if *noAuthFlag {
 		serveMux.HandleFunc(prefix, ws.upgrade_noauth)
 	} else {