diff --git a/tools/conf/transport_test.go b/tools/conf/transport_test.go
new file mode 100644
index 000000000..8f3658f66
--- /dev/null
+++ b/tools/conf/transport_test.go
@@ -0,0 +1,98 @@
+package conf_test
+
+import (
+	"encoding/json"
+	"testing"
+
+	"v2ray.com/core/testing/assert"
+	. "v2ray.com/core/tools/conf"
+	"v2ray.com/core/transport/internet"
+	"v2ray.com/core/transport/internet/headers/http"
+	"v2ray.com/core/transport/internet/headers/noop"
+	"v2ray.com/core/transport/internet/kcp"
+	"v2ray.com/core/transport/internet/tcp"
+	"v2ray.com/core/transport/internet/websocket"
+)
+
+func TestTransportConfig(t *testing.T) {
+	assert := assert.On(t)
+
+	rawJson := `{
+    "tcpSettings": {
+      "connectionReuse": true,
+      "header": {
+        "type": "http",
+        "request": {
+          "version": "1.1",
+          "method": "GET",
+          "path": "/b",
+          "headers": {
+            "a": "b",
+            "c": "d"
+          }
+        },
+        "response": {
+          "version": "1.0",
+          "status": "404",
+          "reason": "Not Found"
+        }
+      }
+    },
+    "kcpSettings": {
+      "mtu": 1200,
+      "header": {
+        "type": "none"
+      }
+    },
+    "wsSettings": {
+      "path": "/t"
+    }
+  }`
+
+	var transportSettingsConf TransportConfig
+	assert.Error(json.Unmarshal([]byte(rawJson), &transportSettingsConf)).IsNil()
+
+	ts, err := transportSettingsConf.Build()
+	assert.Error(err).IsNil()
+
+	assert.Int(len(ts.TransportSettings)).Equals(3)
+	var settingsCount uint32
+	for _, settingsWithProtocol := range ts.TransportSettings {
+		rawSettings, err := settingsWithProtocol.Settings.GetInstance()
+		assert.Error(err).IsNil()
+		switch settings := rawSettings.(type) {
+		case *tcp.Config:
+			settingsCount++
+			assert.Bool(settingsWithProtocol.Protocol == internet.TransportProtocol_TCP).IsTrue()
+			assert.Bool(settings.IsConnectionReuse()).IsTrue()
+			rawHeader, err := settings.HeaderSettings.GetInstance()
+			assert.Error(err).IsNil()
+			header := rawHeader.(*http.Config)
+			assert.String(header.Request.GetVersionValue()).Equals("1.1")
+			assert.String(header.Request.Uri[0]).Equals("/b")
+			assert.String(header.Request.Method.Value).Equals("GET")
+			assert.String(header.Request.Header[0].Name).Equals("a")
+			assert.String(header.Request.Header[0].Value[0]).Equals("b")
+			assert.String(header.Request.Header[1].Name).Equals("c")
+			assert.String(header.Request.Header[1].Value[0]).Equals("d")
+			assert.String(header.Response.Version.Value).Equals("1.0")
+			assert.String(header.Response.Status.Code).Equals("404")
+			assert.String(header.Response.Status.Reason).Equals("Not Found")
+		case *kcp.Config:
+			settingsCount++
+			assert.Bool(settingsWithProtocol.Protocol == internet.TransportProtocol_MKCP).IsTrue()
+			assert.Uint32(settings.GetMTUValue()).Equals(1200)
+			rawHeader, err := settings.HeaderConfig.GetInstance()
+			assert.Error(err).IsNil()
+			header := rawHeader.(*noop.Config)
+			assert.Pointer(header).IsNotNil()
+		case *websocket.Config:
+			settingsCount++
+			assert.Bool(settingsWithProtocol.Protocol == internet.TransportProtocol_WebSocket).IsTrue()
+			assert.String(settings.Path).Equals("/t")
+		default:
+			t.Error("Unknown type of settings.")
+		}
+	}
+	assert.Uint32(settingsCount).Equals(3)
+}