diff --git a/src/vpp/vpp_iface_test.go b/src/vpp/vpp_iface_test.go
new file mode 100644
index 0000000..35b37ab
--- /dev/null
+++ b/src/vpp/vpp_iface_test.go
@@ -0,0 +1,190 @@
+// Copyright 2025, IPng Networks GmbH, Pim van Pelt <pim@ipng.ch>
+
+package vpp
+
+import (
+	"go.fd.io/govpp/binapi/interface_types"
+	"testing"
+)
+
+func TestNewInterfaceManager(t *testing.T) {
+	client := NewVPPClient()
+	manager := NewInterfaceManager(client)
+
+	if manager == nil {
+		t.Fatal("NewInterfaceManager() returned nil")
+	}
+
+	if manager.client != client {
+		t.Error("InterfaceManager should store the provided client")
+	}
+
+	if manager.eventCallback != nil {
+		t.Error("InterfaceManager should have nil callback initially")
+	}
+}
+
+func TestInterfaceManagerSetEventCallback(t *testing.T) {
+	client := NewVPPClient()
+	manager := NewInterfaceManager(client)
+
+	var callbackCalled bool
+	var receivedDetails []InterfaceDetails
+
+	callback := func(details []InterfaceDetails) {
+		callbackCalled = true
+		receivedDetails = details
+	}
+
+	manager.SetEventCallback(callback)
+
+	if manager.eventCallback == nil {
+		t.Error("SetEventCallback() should store the callback")
+	}
+
+	// Test callback execution
+	testDetails := []InterfaceDetails{
+		{
+			SwIfIndex:     1,
+			InterfaceName: "test-interface",
+			MacAddress:    []byte{0xde, 0xad, 0xbe, 0xef, 0x00, 0x01},
+			Speed:         1000000000,
+			AdminStatus:   true,
+			OperStatus:    true,
+			MTU:           1500,
+		},
+	}
+
+	manager.eventCallback(testDetails)
+
+	if !callbackCalled {
+		t.Error("Callback should have been called")
+	}
+
+	if len(receivedDetails) != 1 {
+		t.Errorf("Expected 1 interface detail, got %d", len(receivedDetails))
+	}
+
+	if receivedDetails[0].InterfaceName != "test-interface" {
+		t.Errorf("Expected interface name 'test-interface', got %q", receivedDetails[0].InterfaceName)
+	}
+}
+
+func TestInterfaceManagerGetAllInterfaceDetailsWithoutConnection(t *testing.T) {
+	client := NewVPPClient()
+	manager := NewInterfaceManager(client)
+
+	_, err := manager.GetAllInterfaceDetails()
+	if err == nil {
+		t.Error("GetAllInterfaceDetails() should return error when not connected")
+	}
+
+	vppErr, ok := err.(*VPPError)
+	if !ok {
+		t.Errorf("Expected VPPError, got %T", err)
+	}
+
+	if vppErr.Message != "VPP client not connected" {
+		t.Errorf("Expected specific error message, got: %s", vppErr.Message)
+	}
+}
+
+func TestInterfaceManagerStartEventWatcherWithoutConnection(t *testing.T) {
+	client := NewVPPClient()
+	manager := NewInterfaceManager(client)
+
+	err := manager.StartEventWatcher()
+	if err == nil {
+		t.Error("StartEventWatcher() should return error when not connected")
+	}
+
+	vppErr, ok := err.(*VPPError)
+	if !ok {
+		t.Errorf("Expected VPPError, got %T", err)
+	}
+
+	if vppErr.Message != "VPP client not connected" {
+		t.Errorf("Expected specific error message, got: %s", vppErr.Message)
+	}
+}
+
+func TestInterfaceManagerHandleInterfaceEventWithoutCallback(t *testing.T) {
+	client := NewVPPClient()
+	manager := NewInterfaceManager(client)
+
+	// Should not panic when callback is nil
+	manager.handleInterfaceEvent()
+}
+
+func TestInterfaceDetails(t *testing.T) {
+	details := InterfaceDetails{
+		SwIfIndex:     interface_types.InterfaceIndex(42),
+		InterfaceName: "GigabitEthernet0/8/0",
+		MacAddress:    []byte{0x02, 0xfe, 0x3c, 0x4d, 0x5e, 0x6f},
+		Speed:         10000000000, // 10 Gbps
+		AdminStatus:   true,
+		OperStatus:    false,
+		MTU:           9000,
+	}
+
+	if details.SwIfIndex != 42 {
+		t.Errorf("Expected SwIfIndex 42, got %d", details.SwIfIndex)
+	}
+
+	if details.InterfaceName != "GigabitEthernet0/8/0" {
+		t.Errorf("Expected interface name 'GigabitEthernet0/8/0', got %q", details.InterfaceName)
+	}
+
+	if len(details.MacAddress) != 6 {
+		t.Errorf("Expected MAC address length 6, got %d", len(details.MacAddress))
+	}
+
+	if details.Speed != 10000000000 {
+		t.Errorf("Expected speed 10000000000, got %d", details.Speed)
+	}
+
+	if !details.AdminStatus {
+		t.Error("Expected AdminStatus true")
+	}
+
+	if details.OperStatus {
+		t.Error("Expected OperStatus false")
+	}
+
+	if details.MTU != 9000 {
+		t.Errorf("Expected MTU 9000, got %d", details.MTU)
+	}
+}
+
+func TestInterfaceEventCallback(t *testing.T) {
+	var callbackInvoked bool
+	var callbackDetails []InterfaceDetails
+
+	callback := InterfaceEventCallback(func(details []InterfaceDetails) {
+		callbackInvoked = true
+		callbackDetails = details
+	})
+
+	testDetails := []InterfaceDetails{
+		{SwIfIndex: 1, InterfaceName: "test1"},
+		{SwIfIndex: 2, InterfaceName: "test2"},
+	}
+
+	callback(testDetails)
+
+	if !callbackInvoked {
+		t.Error("Callback should have been invoked")
+	}
+
+	if len(callbackDetails) != 2 {
+		t.Errorf("Expected 2 interface details, got %d", len(callbackDetails))
+	}
+
+	if callbackDetails[0].InterfaceName != "test1" {
+		t.Errorf("Expected first interface 'test1', got %q", callbackDetails[0].InterfaceName)
+	}
+
+	if callbackDetails[1].InterfaceName != "test2" {
+		t.Errorf("Expected second interface 'test2', got %q", callbackDetails[1].InterfaceName)
+	}
+}
diff --git a/src/vpp/vpp_stats_test.go b/src/vpp/vpp_stats_test.go
new file mode 100644
index 0000000..654c15f
--- /dev/null
+++ b/src/vpp/vpp_stats_test.go
@@ -0,0 +1,250 @@
+// Copyright 2025, IPng Networks GmbH, Pim van Pelt <pim@ipng.ch>
+
+package vpp
+
+import (
+	"testing"
+	"time"
+
+	"go.fd.io/govpp/api"
+)
+
+func TestNewStatsManager(t *testing.T) {
+	client := NewVPPClient()
+	interfaceManager := NewInterfaceManager(client)
+	manager := NewStatsManager(client, interfaceManager)
+
+	if manager == nil {
+		t.Fatal("NewStatsManager() returned nil")
+	}
+
+	if manager.client != client {
+		t.Error("StatsManager should store the provided client")
+	}
+
+	if manager.interfaceManager != interfaceManager {
+		t.Error("StatsManager should store the provided interface manager")
+	}
+
+	if manager.period != time.Duration(*Period)*time.Second {
+		t.Errorf("Expected period %v, got %v", time.Duration(*Period)*time.Second, manager.period)
+	}
+
+	if manager.running {
+		t.Error("StatsManager should not be running initially")
+	}
+
+	if manager.statsCallback != nil {
+		t.Error("StatsManager should have nil callback initially")
+	}
+}
+
+func TestStatsManagerSetStatsCallback(t *testing.T) {
+	client := NewVPPClient()
+	interfaceManager := NewInterfaceManager(client)
+	manager := NewStatsManager(client, interfaceManager)
+
+	var callbackCalled bool
+	var receivedStats *api.InterfaceStats
+
+	callback := func(stats *api.InterfaceStats) {
+		callbackCalled = true
+		receivedStats = stats
+	}
+
+	manager.SetStatsCallback(callback)
+
+	if manager.statsCallback == nil {
+		t.Error("SetStatsCallback() should store the callback")
+	}
+
+	// Test callback execution
+	testStats := &api.InterfaceStats{
+		Interfaces: []api.InterfaceCounters{
+			{
+				InterfaceIndex: 1,
+				InterfaceName:  "test-interface",
+				Rx:             api.InterfaceCounterCombined{Packets: 100, Bytes: 1500},
+				Tx:             api.InterfaceCounterCombined{Packets: 50, Bytes: 750},
+			},
+		},
+	}
+
+	manager.statsCallback(testStats)
+
+	if !callbackCalled {
+		t.Error("Callback should have been called")
+	}
+
+	if receivedStats != testStats {
+		t.Error("Callback should receive the same stats object")
+	}
+
+	if len(receivedStats.Interfaces) != 1 {
+		t.Errorf("Expected 1 interface, got %d", len(receivedStats.Interfaces))
+	}
+
+	if receivedStats.Interfaces[0].InterfaceName != "test-interface" {
+		t.Errorf("Expected interface name 'test-interface', got %q", receivedStats.Interfaces[0].InterfaceName)
+	}
+}
+
+func TestStatsManagerSetPeriod(t *testing.T) {
+	client := NewVPPClient()
+	interfaceManager := NewInterfaceManager(client)
+	manager := NewStatsManager(client, interfaceManager)
+
+	newPeriod := 5 * time.Second
+	manager.SetPeriod(newPeriod)
+
+	if manager.period != newPeriod {
+		t.Errorf("Expected period %v, got %v", newPeriod, manager.period)
+	}
+}
+
+func TestStatsManagerStartStopStatsRoutine(t *testing.T) {
+	client := NewVPPClient()
+	interfaceManager := NewInterfaceManager(client)
+	manager := NewStatsManager(client, interfaceManager)
+
+	if manager.running {
+		t.Error("StatsManager should not be running initially")
+	}
+
+	manager.StartStatsRoutine()
+
+	if !manager.running {
+		t.Error("StatsManager should be running after StartStatsRoutine()")
+	}
+
+	// Test starting again (should be safe)
+	manager.StartStatsRoutine()
+
+	if !manager.running {
+		t.Error("StatsManager should still be running after second StartStatsRoutine()")
+	}
+
+	manager.StopStatsRoutine()
+
+	if manager.running {
+		t.Error("StatsManager should not be running after StopStatsRoutine()")
+	}
+}
+
+func TestStatsManagerGetInterfaceStatsWithoutConnection(t *testing.T) {
+	client := NewVPPClient()
+	interfaceManager := NewInterfaceManager(client)
+	manager := NewStatsManager(client, interfaceManager)
+
+	_, err := manager.GetInterfaceStats()
+	if err == nil {
+		t.Error("GetInterfaceStats() should return error when not connected")
+	}
+
+	vppErr, ok := err.(*VPPError)
+	if !ok {
+		t.Errorf("Expected VPPError, got %T", err)
+	}
+
+	if vppErr.Message != "VPP client not connected" {
+		t.Errorf("Expected specific error message, got: %s", vppErr.Message)
+	}
+}
+
+func TestStatsCallback(t *testing.T) {
+	var callbackInvoked bool
+	var callbackStats *api.InterfaceStats
+
+	callback := StatsCallback(func(stats *api.InterfaceStats) {
+		callbackInvoked = true
+		callbackStats = stats
+	})
+
+	testStats := &api.InterfaceStats{
+		Interfaces: []api.InterfaceCounters{
+			{
+				InterfaceIndex: 42,
+				InterfaceName:  "test-callback-interface",
+				Rx:             api.InterfaceCounterCombined{Packets: 200, Bytes: 3000},
+				Tx:             api.InterfaceCounterCombined{Packets: 100, Bytes: 1500},
+				RxUnicast:      api.InterfaceCounterCombined{Packets: 180, Bytes: 2700},
+				TxUnicast:      api.InterfaceCounterCombined{Packets: 90, Bytes: 1350},
+			},
+		},
+	}
+
+	callback(testStats)
+
+	if !callbackInvoked {
+		t.Error("Callback should have been invoked")
+	}
+
+	if callbackStats != testStats {
+		t.Error("Callback should receive the same stats object")
+	}
+
+	if len(callbackStats.Interfaces) != 1 {
+		t.Errorf("Expected 1 interface, got %d", len(callbackStats.Interfaces))
+	}
+
+	iface := callbackStats.Interfaces[0]
+	if iface.InterfaceIndex != 42 {
+		t.Errorf("Expected interface index 42, got %d", iface.InterfaceIndex)
+	}
+
+	if iface.InterfaceName != "test-callback-interface" {
+		t.Errorf("Expected interface name 'test-callback-interface', got %q", iface.InterfaceName)
+	}
+
+	if iface.Rx.Packets != 200 {
+		t.Errorf("Expected RX packets 200, got %d", iface.Rx.Packets)
+	}
+
+	if iface.Tx.Bytes != 1500 {
+		t.Errorf("Expected TX bytes 1500, got %d", iface.Tx.Bytes)
+	}
+
+	if iface.RxUnicast.Packets != 180 {
+		t.Errorf("Expected RX unicast packets 180, got %d", iface.RxUnicast.Packets)
+	}
+
+	if iface.TxUnicast.Bytes != 1350 {
+		t.Errorf("Expected TX unicast bytes 1350, got %d", iface.TxUnicast.Bytes)
+	}
+}
+
+func TestStatsManagerQueryAndReportStatsWithoutConnection(t *testing.T) {
+	client := NewVPPClient()
+	interfaceManager := NewInterfaceManager(client)
+	manager := NewStatsManager(client, interfaceManager)
+
+	// Should return false when not connected
+	if manager.queryAndReportStats() {
+		t.Error("queryAndReportStats() should return false when not connected")
+	}
+}
+
+func TestStatsManagerWithShortPeriod(t *testing.T) {
+	client := NewVPPClient()
+	interfaceManager := NewInterfaceManager(client)
+	manager := NewStatsManager(client, interfaceManager)
+
+	// Set a very short period for testing
+	manager.SetPeriod(10 * time.Millisecond)
+
+	if manager.period != 10*time.Millisecond {
+		t.Errorf("Expected period 10ms, got %v", manager.period)
+	}
+
+	manager.StartStatsRoutine()
+
+	// Let it run briefly
+	time.Sleep(50 * time.Millisecond)
+
+	manager.StopStatsRoutine()
+
+	// Should stop gracefully
+	if manager.running {
+		t.Error("StatsManager should have stopped")
+	}
+}
diff --git a/src/vpp/vpp_test.go b/src/vpp/vpp_test.go
new file mode 100644
index 0000000..96ff40e
--- /dev/null
+++ b/src/vpp/vpp_test.go
@@ -0,0 +1,100 @@
+// Copyright 2025, IPng Networks GmbH, Pim van Pelt <pim@ipng.ch>
+
+package vpp
+
+import (
+	"testing"
+)
+
+func TestNewVPPClient(t *testing.T) {
+	client := NewVPPClient()
+
+	if client == nil {
+		t.Fatal("NewVPPClient() returned nil")
+	}
+
+	if client.IsConnected() {
+		t.Error("NewVPPClient() should return disconnected client")
+	}
+
+	if client.GetAPIConnection() != nil {
+		t.Error("NewVPPClient() should have nil API connection initially")
+	}
+
+	if client.GetStatsConnection() != nil {
+		t.Error("NewVPPClient() should have nil stats connection initially")
+	}
+}
+
+func TestVPPClientDisconnect(t *testing.T) {
+	client := NewVPPClient()
+
+	// Should be safe to call disconnect on unconnected client
+	client.Disconnect()
+
+	if client.IsConnected() {
+		t.Error("Client should not be connected after Disconnect()")
+	}
+}
+
+func TestVPPClientNewAPIChannelWithoutConnection(t *testing.T) {
+	client := NewVPPClient()
+
+	_, err := client.NewAPIChannel()
+	if err == nil {
+		t.Error("NewAPIChannel() should return error when not connected")
+	}
+
+	vppErr, ok := err.(*VPPError)
+	if !ok {
+		t.Errorf("Expected VPPError, got %T", err)
+	}
+
+	if vppErr.Message != "API connection not established" {
+		t.Errorf("Expected specific error message, got: %s", vppErr.Message)
+	}
+}
+
+func TestVPPClientCheckLivenessWithoutConnection(t *testing.T) {
+	client := NewVPPClient()
+
+	if client.CheckLiveness() {
+		t.Error("CheckLiveness() should return false when not connected")
+	}
+}
+
+func TestVPPError(t *testing.T) {
+	err := &VPPError{Message: "test error"}
+
+	if err.Error() != "test error" {
+		t.Errorf("VPPError.Error() returned %q, expected %q", err.Error(), "test error")
+	}
+}
+
+func TestVPPClientConnectWithInvalidPaths(t *testing.T) {
+	// Save original values
+	origApiAddr := *ApiAddr
+	origStatsAddr := *StatsAddr
+
+	// Set invalid paths
+	*ApiAddr = "/tmp/nonexistent_api.sock"
+	*StatsAddr = "/tmp/nonexistent_stats.sock"
+
+	// Restore original values after test
+	defer func() {
+		*ApiAddr = origApiAddr
+		*StatsAddr = origStatsAddr
+	}()
+
+	client := NewVPPClient()
+	err := client.Connect()
+
+	if err == nil {
+		t.Error("Connect() should fail with invalid socket paths")
+		client.Disconnect() // Clean up if somehow it connected
+	}
+
+	if client.IsConnected() {
+		t.Error("Client should not be connected after failed Connect()")
+	}
+}