diff --git a/transport/internet/kcp/connection_test.go b/transport/internet/kcp/connection_test.go
index d095cbc2..6907304e 100644
--- a/transport/internet/kcp/connection_test.go
+++ b/transport/internet/kcp/connection_test.go
@@ -1,16 +1,10 @@
 package kcp_test
 
 import (
-	"crypto/rand"
-	"io"
-	"net"
 	"testing"
 	"time"
 
-	v2net "v2ray.com/core/common/net"
 	"v2ray.com/core/testing/assert"
-	"v2ray.com/core/transport/internet"
-	"v2ray.com/core/transport/internet/authenticators/srtp"
 	. "v2ray.com/core/transport/internet/kcp"
 )
 
@@ -37,43 +31,3 @@ func TestConnectionReadTimeout(t *testing.T) {
 
 	conn.Terminate()
 }
-
-func TestConnectionReadWrite(t *testing.T) {
-	assert := assert.On(t)
-
-	upReader, upWriter := io.Pipe()
-	downReader, downWriter := io.Pipe()
-
-	auth := internet.NewAuthenticatorChain(srtp.SRTPFactory{}.Create(nil), NewSimpleAuthenticator())
-
-	connClient := NewConnection(1, upWriter, &net.UDPAddr{IP: v2net.LocalHostIP.IP(), Port: 1}, &net.UDPAddr{IP: v2net.LocalHostIP.IP(), Port: 2}, auth, &Config{})
-	connClient.FetchInputFrom(downReader)
-
-	connServer := NewConnection(1, downWriter, &net.UDPAddr{IP: v2net.LocalHostIP.IP(), Port: 2}, &net.UDPAddr{IP: v2net.LocalHostIP.IP(), Port: 1}, auth, &Config{})
-	connServer.FetchInputFrom(upReader)
-
-	totalWritten := 1024 * 1024
-	clientSend := make([]byte, totalWritten)
-	rand.Read(clientSend)
-	go func() {
-		nBytes, err := connClient.Write(clientSend)
-		assert.Int(nBytes).Equals(totalWritten)
-		assert.Error(err).IsNil()
-	}()
-
-	serverReceived := make([]byte, totalWritten)
-	totalRead := 0
-	for totalRead < totalWritten {
-		nBytes, err := connServer.Read(serverReceived[totalRead:])
-		assert.Error(err).IsNil()
-		totalRead += nBytes
-	}
-	assert.Bytes(serverReceived).Equals(clientSend)
-
-	connClient.Close()
-	connServer.Close()
-
-	for connClient.State() != StateTerminated || connServer.State() != StateTerminated {
-		time.Sleep(time.Second)
-	}
-}