diff --git a/x/oob/oob_test.go b/x/oob/oob_test.go
new file mode 100644
index 00000000..5f02e875
--- /dev/null
+++ b/x/oob/oob_test.go
@@ -0,0 +1,129 @@
+package oob
+
+import (
+	"bufio"
+	"context"
+	"net"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
+
+	"github.com/Jigsaw-Code/outline-sdk/transport"
+)
+
+const (
+	msg    = "Hello OOB!\n"
+	msgLen = len(msg)
+)
+
+// OOBDialerTestSuite - test suite for testing oobDialer and oobWriter
+type OOBDialerTestSuite struct {
+	suite.Suite
+	server     net.Listener
+	dataChan   chan []byte
+	serverAddr string
+}
+
+// SetupSuite - runs once before all tests
+func (suite *OOBDialerTestSuite) SetupSuite() {
+	// Start TCP server
+	listener, dataChan := startTestServer(suite.T())
+	suite.server = listener
+	suite.dataChan = dataChan
+	suite.serverAddr = listener.Addr().String()
+}
+
+// TearDownSuite - runs once after all tests
+func (suite *OOBDialerTestSuite) TearDownSuite() {
+	suite.server.Close()
+	close(suite.dataChan)
+}
+
+// startTestServer - starts a test server and returns listener and data channel
+
+func startTestServer(t *testing.T) (net.Listener, chan []byte) {
+	listener, err := net.Listen("tcp", "localhost:0")
+	require.NoError(t, err, "Failed to create server")
+
+	dataChan := make(chan []byte, 10)
+	go func() {
+		for {
+			conn, err := listener.Accept()
+			if err != nil {
+				return
+			}
+
+			go func(conn net.Conn) {
+				defer conn.Close()
+
+				scanner := bufio.NewScanner(conn)
+				for scanner.Scan() {
+					line := scanner.Bytes()
+					dataChan <- append([]byte{}, line...)
+					break
+				}
+
+				if err := scanner.Err(); err != nil {
+					t.Logf("Error reading data: %v", err)
+				}
+			}(conn)
+		}
+	}()
+
+	return listener, dataChan
+}
+
+// TestDialStreamWithDifferentParameters - test data transmission with different parameters
+func (suite *OOBDialerTestSuite) TestDialStreamWithDifferentParameters() {
+	tests := []struct {
+		oobPosition int64
+		oobByte     byte
+		disOOB      bool
+		delay       time.Duration
+	}{
+		{oobPosition: 0, oobByte: 0x01, disOOB: false, delay: 100 * time.Millisecond},
+		{oobPosition: 0, oobByte: 0x01, disOOB: true, delay: 100 * time.Millisecond},
+
+		{oobPosition: 2, oobByte: 0x02, disOOB: true, delay: 200 * time.Millisecond},
+		{oobPosition: 2, oobByte: 0x02, disOOB: false, delay: 200 * time.Millisecond},
+
+		{oobPosition: int64(msgLen) - 2, oobByte: 0x02, disOOB: true, delay: 200 * time.Millisecond},
+		{oobPosition: int64(msgLen) - 2, oobByte: 0x02, disOOB: false, delay: 200 * time.Millisecond},
+
+		{oobPosition: int64(msgLen) - 1, oobByte: 0x02, disOOB: true, delay: 200 * time.Millisecond},
+		{oobPosition: int64(msgLen) - 1, oobByte: 0x02, disOOB: false, delay: 200 * time.Millisecond},
+	}
+
+	for _, tt := range tests {
+		suite.Run("Testing with different parameters", func() {
+			ctx := context.Background()
+
+			dialer := &transport.TCPDialer{
+				Dialer: net.Dialer{},
+			}
+			oobDialer, err := NewStreamDialer(dialer, tt.oobPosition, tt.oobByte, tt.disOOB, tt.delay)
+
+			conn, err := oobDialer.DialStream(ctx, suite.serverAddr)
+
+			require.NoError(suite.T(), err)
+
+			// Send test message
+			message := []byte("Hello OOB!\n")
+			n, err := conn.Write(message)
+			require.NoError(suite.T(), err)
+			assert.Equal(suite.T(), len(message), n)
+
+			// Check that the server received the message
+			receivedData := <-suite.dataChan
+			assert.Equal(suite.T(), string(message[0:len(message)-1]), string(receivedData))
+		})
+	}
+}
+
+// TestOOBDialerSuite - main test suite
+func TestOOBDialerSuite(t *testing.T) {
+	suite.Run(t, new(OOBDialerTestSuite))
+}
diff --git a/x/oob/writer.go b/x/oob/writer.go
index ea340491..863bf885 100644
--- a/x/oob/writer.go
+++ b/x/oob/writer.go
@@ -2,11 +2,12 @@ package oob
 
 import (
 	"fmt"
-	"github.com/Jigsaw-Code/outline-sdk/x/sockopt"
 	"io"
 	"net"
 	"sync"
 	"time"
+
+	"github.com/Jigsaw-Code/outline-sdk/x/sockopt"
 )
 
 type oobWriter struct {
@@ -46,7 +47,6 @@ func (w *oobWriter) Write(data []byte) (int, error) {
 	var written int
 	var err error
 
-	fmt.Println("oobWriter, total: ", len(data))
 	if w.oobPosition > 0 && w.oobPosition < int64(len(data))-1 {
 		firstPart := data[:w.oobPosition+1]
 		secondPart := data[w.oobPosition:]
@@ -76,8 +76,6 @@ func (w *oobWriter) Write(data []byte) (int, error) {
 		written = int(w.oobPosition)
 		secondPart[0] = tmp
 
-		fmt.Printf("oobWriter: firstPart len: %d\n", len(firstPart))
-
 		if w.disOOB {
 			w.resetTTL.Do(func() {
 				err = w.opts.SetHopLimit(oldTTL)
@@ -95,7 +93,7 @@ func (w *oobWriter) Write(data []byte) (int, error) {
 	// Write the remaining data
 	n, err := w.conn.Write(data)
 	written += n
-	fmt.Printf("oobWriter: second part len: %d\n", len(data))
+
 	return written, err
 }