diff --git a/internal/multiplex/stream_test.go b/internal/multiplex/stream_test.go
index 25ecf8c..26d66f7 100644
--- a/internal/multiplex/stream_test.go
+++ b/internal/multiplex/stream_test.go
@@ -127,24 +127,12 @@ func TestStream_Close(t *testing.T) {
 		0,
 		testPayload,
 	}
-	ch := make(chan []byte)
-	l, _ := net.Listen("tcp", "127.0.0.1:0")
-	go func() {
-		conn, _ := net.Dial("tcp", l.Addr().String())
-		for {
-			data := <-ch
-			_, err := conn.Write(data)
-			if err != nil {
-				t.Error("cannot write to connection", err)
-				return
-			}
-		}
-	}()
-	conn, _ := l.Accept()
+
+	conn, writingEnd := util.GetMockConn()
 	sesh.AddConnection(conn)
 	obfsBuf := make([]byte, 512)
 	i, _ := sesh.Obfs(f, obfsBuf)
-	ch <- obfsBuf[:i]
+	writingEnd <- obfsBuf[:i]
 	time.Sleep(100 * time.Microsecond)
 	stream, err := sesh.Accept()
 	if err != nil {
@@ -175,20 +163,7 @@ func TestStream_Read(t *testing.T) {
 		testPayload,
 	}
 
-	ch := make(chan []byte)
-	l, _ := net.Listen("tcp", "127.0.0.1:0")
-	go func() {
-		conn, _ := net.Dial("tcp", l.Addr().String())
-		for {
-			data := <-ch
-			_, err := conn.Write(data)
-			if err != nil {
-				t.Error("cannot write to connection", err)
-				return
-			}
-		}
-	}()
-	conn, _ := l.Accept()
+	conn, writingEnd := util.GetMockConn()
 	sesh.AddConnection(conn)
 
 	var streamID uint32
@@ -199,7 +174,7 @@ func TestStream_Read(t *testing.T) {
 		f.StreamID = streamID
 		i, _ := sesh.Obfs(f, obfsBuf)
 		streamID++
-		ch <- obfsBuf[:i]
+		writingEnd <- obfsBuf[:i]
 		time.Sleep(100 * time.Microsecond)
 		stream, err := sesh.Accept()
 		if err != nil {
@@ -225,7 +200,7 @@ func TestStream_Read(t *testing.T) {
 		f.StreamID = streamID
 		i, _ := sesh.Obfs(f, obfsBuf)
 		streamID++
-		ch <- obfsBuf[:i]
+		writingEnd <- obfsBuf[:i]
 		time.Sleep(100 * time.Microsecond)
 		stream, _ := sesh.Accept()
 		i, err := stream.Read(nil)
@@ -246,7 +221,7 @@ func TestStream_Read(t *testing.T) {
 		f.StreamID = streamID
 		i, _ := sesh.Obfs(f, obfsBuf)
 		streamID++
-		ch <- obfsBuf[:i]
+		writingEnd <- obfsBuf[:i]
 		time.Sleep(100 * time.Microsecond)
 		stream, _ := sesh.Accept()
 		stream.Close()
@@ -271,7 +246,7 @@ func TestStream_Read(t *testing.T) {
 		f.StreamID = streamID
 		i, _ := sesh.Obfs(f, obfsBuf)
 		streamID++
-		ch <- obfsBuf[:i]
+		writingEnd <- obfsBuf[:i]
 		time.Sleep(100 * time.Microsecond)
 		stream, _ := sesh.Accept()
 		sesh.Close()
@@ -307,19 +282,7 @@ func TestStream_UnorderedRead(t *testing.T) {
 		testPayload,
 	}
 
-	ch := make(chan []byte)
-	l, _ := net.Listen("tcp", "127.0.0.1:0")
-	go func() {
-		conn, _ := net.Dial("tcp", l.Addr().String())
-		for {
-			data := <-ch
-			_, err := conn.Write(data)
-			if err != nil {
-				t.Error("cannot write to connection", err)
-			}
-		}
-	}()
-	conn, _ := l.Accept()
+	conn, writingEnd := util.GetMockConn()
 	sesh.AddConnection(conn)
 
 	var streamID uint32
@@ -330,7 +293,7 @@ func TestStream_UnorderedRead(t *testing.T) {
 		f.StreamID = streamID
 		i, _ := sesh.Obfs(f, obfsBuf)
 		streamID++
-		ch <- obfsBuf[:i]
+		writingEnd <- obfsBuf[:i]
 		time.Sleep(100 * time.Microsecond)
 		stream, err := sesh.Accept()
 		if err != nil {
@@ -352,7 +315,7 @@ func TestStream_UnorderedRead(t *testing.T) {
 		f.StreamID = streamID
 		i, _ := sesh.Obfs(f, obfsBuf)
 		streamID++
-		ch <- obfsBuf[:i]
+		writingEnd <- obfsBuf[:i]
 		time.Sleep(100 * time.Microsecond)
 		stream, _ := sesh.Accept()
 		i, err := stream.Read(nil)
@@ -373,7 +336,7 @@ func TestStream_UnorderedRead(t *testing.T) {
 		f.StreamID = streamID
 		i, _ := sesh.Obfs(f, obfsBuf)
 		streamID++
-		ch <- obfsBuf[:i]
+		writingEnd <- obfsBuf[:i]
 		time.Sleep(100 * time.Microsecond)
 		stream, _ := sesh.Accept()
 		stream.Close()
@@ -398,7 +361,7 @@ func TestStream_UnorderedRead(t *testing.T) {
 		f.StreamID = streamID
 		i, _ := sesh.Obfs(f, obfsBuf)
 		streamID++
-		ch <- obfsBuf[:i]
+		writingEnd <- obfsBuf[:i]
 		time.Sleep(100 * time.Microsecond)
 		stream, _ := sesh.Accept()
 		sesh.Close()
diff --git a/internal/server/websocketAux_test.go b/internal/server/websocketAux_test.go
new file mode 100644
index 0000000..eb68c5a
--- /dev/null
+++ b/internal/server/websocketAux_test.go
@@ -0,0 +1,58 @@
+package server
+
+import (
+	"bytes"
+	"github.com/cbeuw/Cloak/internal/util"
+	"testing"
+)
+
+func TestFirstBuffedConn_Read(t *testing.T) {
+	mockConn, writingEnd := util.GetMockConn()
+
+	expectedFirstPacket := []byte{1, 2, 3}
+	firstBuffedConn := &firstBuffedConn{
+		Conn:        mockConn,
+		firstRead:   false,
+		firstPacket: expectedFirstPacket,
+	}
+
+	buf := make([]byte, 1024)
+	n ,err :=firstBuffedConn.Read(buf)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	if !bytes.Equal(expectedFirstPacket, buf[:n]){
+		t.Error("first read doesn't produce given packet")
+		return
+	}
+
+	expectedSecondPacket := []byte{4,5,6,7}
+	writingEnd <- expectedSecondPacket
+	n ,err =firstBuffedConn.Read(buf)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	if !bytes.Equal(expectedSecondPacket, buf[:n]){
+		t.Error("second read doesn't produce subsequently written packet")
+		return
+	}
+}
+
+func TestWsAcceptor(t *testing.T){
+	mockConn, _ := util.GetMockConn()
+	expectedFirstPacket := []byte{1, 2, 3}
+
+	wsAcceptor:=newWsAcceptor(mockConn, expectedFirstPacket)
+	_,err := wsAcceptor.Accept()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	_,err = wsAcceptor.Accept()
+	if err == nil{
+		t.Error("accepting second time doesn't return error")
+	}
+}
\ No newline at end of file
diff --git a/internal/util/util.go b/internal/util/util.go
index f45ab8d..f871ef9 100644
--- a/internal/util/util.go
+++ b/internal/util/util.go
@@ -6,6 +6,7 @@ import (
 	"crypto/rand"
 	"encoding/binary"
 	"errors"
+	"fmt"
 	"io"
 	"net"
 	"strconv"
@@ -136,3 +137,21 @@ func Pipe(dst net.Conn, src net.Conn, srcReadTimeout time.Duration) {
 		}
 	}
 }
+
+func GetMockConn() (net.Conn, chan []byte) {
+	ch := make(chan []byte)
+	l, _ := net.Listen("tcp", "127.0.0.1:0")
+	go func() {
+		conn, _ := net.Dial("tcp", l.Addr().String())
+		for {
+			data := <-ch
+			_, err := conn.Write(data)
+			if err != nil {
+				fmt.Println("cannot write to connection", err)
+			}
+		}
+	}()
+	conn, _ := l.Accept()
+
+	return conn, ch
+}