diff --git a/transport/internet/ws/ws_test.go b/transport/internet/ws/ws_test.go
new file mode 100644
index 00000000..f72c0f99
--- /dev/null
+++ b/transport/internet/ws/ws_test.go
@@ -0,0 +1,109 @@
+package ws_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/v2ray/v2ray-core/testing/assert"
+
+	. "github.com/v2ray/v2ray-core/transport/internet/ws"
+
+	v2net "github.com/v2ray/v2ray-core/common/net"
+)
+
+func Test_Connect_ws(t *testing.T) {
+	assert := assert.On(t)
+	(&Config{Pto: "ws", Path: ""}).Apply()
+	conn, err := Dial(v2net.AnyIP, v2net.TCPDestination(v2net.DomainAddress("echo.websocket.org"), 80))
+	assert.Error(err).IsNil()
+	conn.Write([]byte("echo"))
+	s := make(chan int)
+	go func() {
+		buf := make([]byte, 4)
+		conn.Read(buf)
+		s <- 0
+	}()
+	<-s
+	conn.Close()
+}
+
+func Test_Connect_wss(t *testing.T) {
+	assert := assert.On(t)
+	(&Config{Pto: "wss", Path: ""}).Apply()
+	conn, err := Dial(v2net.AnyIP, v2net.TCPDestination(v2net.DomainAddress("echo.websocket.org"), 443))
+	assert.Error(err).IsNil()
+	conn.Write([]byte("echo"))
+	s := make(chan int)
+	go func() {
+		buf := make([]byte, 4)
+		conn.Read(buf)
+		s <- 0
+	}()
+	<-s
+	conn.Close()
+}
+
+func Test_Connect_ws_guess(t *testing.T) {
+	assert := assert.On(t)
+	(&Config{Pto: "", Path: ""}).Apply()
+	conn, err := Dial(v2net.AnyIP, v2net.TCPDestination(v2net.DomainAddress("echo.websocket.org"), 80))
+	assert.Error(err).IsNil()
+	conn.Write([]byte("echo"))
+	s := make(chan int)
+	go func() {
+		buf := make([]byte, 4)
+		conn.Read(buf)
+		s <- 0
+	}()
+	<-s
+	conn.Close()
+}
+
+func Test_Connect_wss_guess(t *testing.T) {
+	assert := assert.On(t)
+	(&Config{Pto: "", Path: ""}).Apply()
+	conn, err := Dial(v2net.AnyIP, v2net.TCPDestination(v2net.DomainAddress("echo.websocket.org"), 443))
+	assert.Error(err).IsNil()
+	conn.Write([]byte("echo"))
+	s := make(chan int)
+	go func() {
+		buf := make([]byte, 4)
+		conn.Read(buf)
+		s <- 0
+	}()
+	<-s
+	conn.Close()
+}
+
+func Test_Connect_wss_guess_fail(t *testing.T) {
+	assert := assert.On(t)
+	(&Config{Pto: "", Path: ""}).Apply()
+	_, err := Dial(v2net.AnyIP, v2net.TCPDestination(v2net.DomainAddress("static.kkdev.org"), 443))
+	assert.Error(err).IsNotNil()
+}
+
+func Test_Connect_wss_guess_reuse(t *testing.T) {
+	assert := assert.On(t)
+	(&Config{Pto: "", Path: "", ConnectionReuse: true}).Apply()
+	i := 3
+	for i != 0 {
+		conn, err := Dial(v2net.AnyIP, v2net.TCPDestination(v2net.DomainAddress("echo.websocket.org"), 443))
+		assert.Error(err).IsNil()
+		conn.Write([]byte("echo"))
+		s := make(chan int)
+		go func() {
+			buf := make([]byte, 4)
+			conn.Read(buf)
+			s <- 0
+		}()
+		<-s
+		if i == 0 {
+			conn.SetDeadline(time.Now())
+			conn.SetReadDeadline(time.Now())
+			conn.SetWriteDeadline(time.Now())
+			conn.SetReusable(false)
+		}
+		conn.Close()
+		i--
+	}
+}