diff --git a/testing/scenarios/dokodemo_test.go b/testing/scenarios/dokodemo_test.go
index b7e2d738..c5a8e6be 100644
--- a/testing/scenarios/dokodemo_test.go
+++ b/testing/scenarios/dokodemo_test.go
@@ -7,6 +7,7 @@ import (
 	"v2ray.com/core/app/log"
 	"v2ray.com/core/app/proxyman"
 	"v2ray.com/core/common/net"
+	clog "v2ray.com/core/common/net"
 	"v2ray.com/core/common/protocol"
 	"v2ray.com/core/common/serial"
 	"v2ray.com/core/common/uuid"
@@ -35,7 +36,7 @@ func TestDokodemoTCP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -68,7 +69,7 @@ func TestDokodemoTCP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
diff --git a/testing/scenarios/feature_test.go b/testing/scenarios/feature_test.go
index 7d1b84c0..6c151314 100644
--- a/testing/scenarios/feature_test.go
+++ b/testing/scenarios/feature_test.go
@@ -12,6 +12,7 @@ import (
 	"v2ray.com/core/app/log"
 	"v2ray.com/core/app/proxyman"
 	"v2ray.com/core/app/router"
+	clog "v2ray.com/core/common/log"
 	"v2ray.com/core/common/net"
 	"v2ray.com/core/common/protocol"
 	"v2ray.com/core/common/serial"
@@ -718,7 +719,7 @@ func TestDomainSniffing(t *testing.T) {
 				},
 			}),
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
diff --git a/testing/scenarios/shadowsocks_test.go b/testing/scenarios/shadowsocks_test.go
index ae3f611c..931b6402 100644
--- a/testing/scenarios/shadowsocks_test.go
+++ b/testing/scenarios/shadowsocks_test.go
@@ -11,6 +11,7 @@ import (
 	"v2ray.com/core/app/log"
 	"v2ray.com/core/app/proxyman"
 	"v2ray.com/core/common/buf"
+	clog "v2ray.com/core/common/log"
 	"v2ray.com/core/common/net"
 	"v2ray.com/core/common/protocol"
 	"v2ray.com/core/common/serial"
@@ -44,7 +45,7 @@ func TestShadowsocksAES256TCP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -73,7 +74,7 @@ func TestShadowsocksAES256TCP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -162,7 +163,7 @@ func TestShadowsocksAES128UDP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -192,7 +193,7 @@ func TestShadowsocksAES128UDP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -281,7 +282,7 @@ func TestShadowsocksChacha20TCP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -310,7 +311,7 @@ func TestShadowsocksChacha20TCP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -398,7 +399,7 @@ func TestShadowsocksAES256GCMTCP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -427,7 +428,7 @@ func TestShadowsocksAES256GCMTCP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -515,7 +516,7 @@ func TestShadowsocksAES128GCMUDP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -545,7 +546,7 @@ func TestShadowsocksAES128GCMUDP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -633,7 +634,7 @@ func TestShadowsocksAES256GCMConformance(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -711,7 +712,7 @@ func TestShadowsocksChacha20Poly1305UDPConformance(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -794,7 +795,7 @@ func TestShadowsocksChacha20Conformance(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
diff --git a/testing/scenarios/vmess_test.go b/testing/scenarios/vmess_test.go
index 4d6984e6..9b494fb9 100644
--- a/testing/scenarios/vmess_test.go
+++ b/testing/scenarios/vmess_test.go
@@ -9,6 +9,7 @@ import (
 	"v2ray.com/core"
 	"v2ray.com/core/app/log"
 	"v2ray.com/core/app/proxyman"
+	clog "v2ray.com/core/common/log"
 	"v2ray.com/core/common/net"
 	"v2ray.com/core/common/protocol"
 	"v2ray.com/core/common/serial"
@@ -39,7 +40,7 @@ func TestVMessDynamicPort(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -94,7 +95,7 @@ func TestVMessDynamicPort(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -174,7 +175,7 @@ func TestVMessGCM(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -207,7 +208,7 @@ func TestVMessGCM(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -297,7 +298,7 @@ func TestVMessGCMUDP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -330,7 +331,7 @@ func TestVMessGCMUDP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -430,7 +431,7 @@ func TestVMessChacha20(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -463,7 +464,7 @@ func TestVMessChacha20(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -553,7 +554,7 @@ func TestVMessNone(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -586,7 +587,7 @@ func TestVMessNone(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -678,7 +679,7 @@ func TestVMessKCP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -714,7 +715,7 @@ func TestVMessKCP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -811,7 +812,7 @@ func TestVMessIPv6(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -844,7 +845,7 @@ func TestVMessIPv6(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -926,7 +927,7 @@ func TestVMessGCMMux(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -959,7 +960,7 @@ func TestVMessGCMMux(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -1068,7 +1069,7 @@ func TestVMessGCMMuxUDP(t *testing.T) {
 	serverConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},
@@ -1102,7 +1103,7 @@ func TestVMessGCMMuxUDP(t *testing.T) {
 	clientConfig := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&log.Config{
-				ErrorLogLevel: log.LogLevel_Debug,
+				ErrorLogLevel: clog.Severity_Debug,
 				ErrorLogType:  log.LogType_Console,
 			}),
 		},