diff --git a/service/http/binding_test.go b/service/http/binding_test.go
index 86bff7c1..d1410dd7 100755
--- a/service/http/binding_test.go
+++ b/service/http/binding_test.go
@@ -13,7 +13,7 @@ import (
 )
 
 func TestBindingHandlerWithoutData(t *testing.T) {
-	s := newService("")
+	s := newServer("", nil)
 	err := s.AddBindingInvocationHandler("/", func(ctx context.Context, in *common.BindingEvent) (out []byte, err error) {
 		if in == nil {
 			return nil, errors.New("nil input")
@@ -37,7 +37,7 @@ func TestBindingHandlerWithoutData(t *testing.T) {
 
 func TestBindingHandlerWithData(t *testing.T) {
 	data := `{"name": "test"}`
-	s := newService("")
+	s := newServer("", nil)
 	err := s.AddBindingInvocationHandler("/", func(ctx context.Context, in *common.BindingEvent) (out []byte, err error) {
 		if in == nil {
 			return nil, errors.New("nil input")
diff --git a/service/http/invoke_test.go b/service/http/invoke_test.go
index 2cdc39ce..c7635cc8 100755
--- a/service/http/invoke_test.go
+++ b/service/http/invoke_test.go
@@ -15,7 +15,7 @@ import (
 
 func TestInvocationHandlerWithData(t *testing.T) {
 	data := `{"name": "test", "data": hellow}`
-	s := newService("")
+	s := newServer("", nil)
 	err := s.AddServiceInvocationHandler("/", func(ctx context.Context, in *common.InvocationEvent) (out *common.Content, err error) {
 		if in == nil || in.Data == nil || in.ContentType == "" {
 			err = errors.New("nil input")
@@ -44,7 +44,7 @@ func TestInvocationHandlerWithData(t *testing.T) {
 }
 
 func TestInvocationHandlerWithoutInputData(t *testing.T) {
-	s := newService("")
+	s := newServer("", nil)
 	err := s.AddServiceInvocationHandler("/", func(ctx context.Context, in *common.InvocationEvent) (out *common.Content, err error) {
 		if in == nil || in.Data != nil {
 			err = errors.New("nil input")
@@ -69,7 +69,7 @@ func TestInvocationHandlerWithoutInputData(t *testing.T) {
 }
 
 func TestInvocationHandlerWithInvalidRoute(t *testing.T) {
-	s := newService("")
+	s := newServer("", nil)
 	err := s.AddServiceInvocationHandler("/a", func(ctx context.Context, in *common.InvocationEvent) (out *common.Content, err error) {
 		return nil, nil
 	})
diff --git a/service/http/service.go b/service/http/service.go
index a1de0575..60809b48 100755
--- a/service/http/service.go
+++ b/service/http/service.go
@@ -8,13 +8,21 @@ import (
 
 // NewService creates new Service
 func NewService(address string) common.Service {
-	return newService(address)
+	return newServer(address, nil)
 }
 
-func newService(address string) *Server {
+// NewServiceWithMux creates new Service with existing http mux
+func NewServiceWithMux(address string, mux *http.ServeMux) common.Service {
+	return newServer(address, mux)
+}
+
+func newServer(address string, mux *http.ServeMux) *Server {
+	if mux == nil {
+		mux = http.NewServeMux()
+	}
 	return &Server{
 		address:            address,
-		mux:                http.NewServeMux(),
+		mux:                mux,
 		topicSubscriptions: make([]*common.Subscription, 0),
 	}
 }
diff --git a/service/http/service_test.go b/service/http/service_test.go
index 4cbc9415..4a7585ab 100644
--- a/service/http/service_test.go
+++ b/service/http/service_test.go
@@ -7,6 +7,6 @@ import (
 )
 
 func TestStoppingUnstartedService(t *testing.T) {
-	s := newService("")
+	s := newServer("", nil)
 	assert.NotNil(t, s)
 }
diff --git a/service/http/topic_test.go b/service/http/topic_test.go
index 0af08b4b..1b10dda3 100755
--- a/service/http/topic_test.go
+++ b/service/http/topic_test.go
@@ -27,7 +27,7 @@ func TestEventHandler(t *testing.T) {
 		"data" : "eyJtZXNzYWdlIjoiaGVsbG8ifQ=="
 	}`
 
-	s := newService("")
+	s := newServer("", nil)
 
 	sub := &common.Subscription{
 		PubsubName: "messages",