diff --git a/peer/connreader_test.go b/peer/connreader_test.go
index 5d91547..fe8e6cb 100644
--- a/peer/connreader_test.go
+++ b/peer/connreader_test.go
@@ -236,7 +236,7 @@ func TestConnReader_handleControlPacket_unknownPacketType(t *testing.T) {
 func TestConnReader_handleControlPacket_duplicate(t *testing.T) {
 	h := newConnReadeTestHarness()
 
-	pkt := synPacket{TraceID: 1234}
+	pkt := ackPacket{TraceID: 1234}
 
 	h.WRemote.SendControlPacket(pkt, h.Remote)
 	*h.Remote.Counter = *h.Remote.Counter - 1
@@ -249,7 +249,7 @@ func TestConnReader_handleControlPacket_duplicate(t *testing.T) {
 		t.Fatal(h.Super.Messages)
 	}
 
-	msg := h.Super.Messages[0].(controlMsg[synPacket])
+	msg := h.Super.Messages[0].(controlMsg[ackPacket])
 	if !reflect.DeepEqual(pkt, msg.Packet) {
 		t.Fatal(msg.Packet)
 	}