diff --git a/integrationtests/tools/proxy/proxy.go b/integrationtests/tools/proxy/proxy.go
index 5b1dc21d0..8d3724765 100644
--- a/integrationtests/tools/proxy/proxy.go
+++ b/integrationtests/tools/proxy/proxy.go
@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/lucas-clemente/quic-go/internal/protocol"
+	"github.com/lucas-clemente/quic-go/internal/utils"
 )
 
 // Connection is a UDP connection
@@ -131,6 +132,7 @@ func NewQuicProxy(local string, version protocol.VersionNumber, opts *Opts) (*Qu
 		version:     version,
 	}
 
+	utils.Debugf("Starting UDP Proxy %s <-> %s", conn.LocalAddr(), raddr)
 	go p.runProxy()
 	return &p, nil
 }
@@ -189,19 +191,27 @@ func (p *QuicProxy) runProxy() error {
 		packetCount := atomic.AddUint64(&conn.incomingPacketCounter, 1)
 
 		if p.dropPacket(DirectionIncoming, packetCount) {
+			if utils.Debug() {
+				utils.Debugf("dropping incoming packet %d (%d bytes)", packetCount, n)
+			}
 			continue
 		}
 
 		// Send the packet to the server
 		delay := p.delayPacket(DirectionIncoming, packetCount)
 		if delay != 0 {
+			if utils.Debug() {
+				utils.Debugf("delaying incoming packet %d (%d bytes) to %s by %s", packetCount, n, conn.ServerConn.RemoteAddr(), delay)
+			}
 			time.AfterFunc(delay, func() {
 				// TODO: handle error
 				_, _ = conn.ServerConn.Write(raw)
 			})
 		} else {
-			_, err := conn.ServerConn.Write(raw)
-			if err != nil {
+			if utils.Debug() {
+				utils.Debugf("forwarding incoming packet %d (%d bytes) to %s", packetCount, n, conn.ServerConn.RemoteAddr())
+			}
+			if _, err := conn.ServerConn.Write(raw); err != nil {
 				return err
 			}
 		}
@@ -221,18 +231,27 @@ func (p *QuicProxy) runConnection(conn *connection) error {
 		packetCount := atomic.AddUint64(&conn.outgoingPacketCounter, 1)
 
 		if p.dropPacket(DirectionOutgoing, packetCount) {
+			if utils.Debug() {
+				utils.Debugf("dropping outgoing packet %d (%d bytes)", packetCount, n)
+			}
 			continue
 		}
+		utils.Debugf("forwarding outgoing packet %d (%d bytes) to %s", packetCount, n, conn.ClientAddr)
 
 		delay := p.delayPacket(DirectionOutgoing, packetCount)
 		if delay != 0 {
+			if utils.Debug() {
+				utils.Debugf("delaying outgoing packet %d (%d bytes) to %s by %s", packetCount, n, conn.ClientAddr, delay)
+			}
 			time.AfterFunc(delay, func() {
 				// TODO: handle error
 				_, _ = p.conn.WriteToUDP(raw, conn.ClientAddr)
 			})
 		} else {
-			_, err := p.conn.WriteToUDP(raw, conn.ClientAddr)
-			if err != nil {
+			if utils.Debug() {
+				utils.Debugf("forwarding outgoing packet %d (%d bytes) to %s", packetCount, n, conn.ClientAddr)
+			}
+			if _, err := p.conn.WriteToUDP(raw, conn.ClientAddr); err != nil {
 				return err
 			}
 		}