diff --git a/internal/pkg/application/pppoeia_test.go b/internal/pkg/application/pppoeia_test.go
index 0b8ed04..5c9aeac 100644
--- a/internal/pkg/application/pppoeia_test.go
+++ b/internal/pkg/application/pppoeia_test.go
@@ -199,7 +199,7 @@
 				va.DevicesDisc.Store(test_device, voltDevice)
 				pkt.EXPECT().Layers().Return(LayerTypeDot2Q).Times(3)
 				voltPortVnet1[0].SVlan = 0
-				voltDevice.NniPort = "1"
+				voltDevice.NniPort = []string{"1"}
 				va.VnetsByPort.Store("test_port", voltPortVnet1)
 				voltPortVnet1[0].PppoeIa = true
 				voltPortVnet1[0].AllowTransparent = true