diff --git a/server_test.go b/server_test.go
index 6e8d442f..044121cf 100644
--- a/server_test.go
+++ b/server_test.go
@@ -43,6 +43,22 @@ func RunLocalUDPServer(laddr string) (*Server, string, error) {
 	return server, pc.LocalAddr().String(), nil
 }
 
+func RunLocalUDPServerUnsafe(laddr string) (*Server, string, error) {
+	pc, err := net.ListenPacket("udp", laddr)
+	if err != nil {
+		return nil, "", err
+	}
+	server := &Server{PacketConn: pc, Unsafe: true}
+	go func() {
+		server.ActivateAndServe()
+		pc.Close()
+	}()
+
+	time.Sleep(50 * time.Millisecond)
+
+	return server, pc.LocalAddr().String(), nil
+}
+
 func RunLocalTCPServer(laddr string) (*Server, string, error) {
 	l, err := net.Listen("tcp", laddr)
 	if err != nil {
@@ -328,7 +344,6 @@ func TestServingResponse(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Unable to run test server: %s", err)
 	}
-	defer s.Shutdown()
 
 	c := new(Client)
 	m := new(Msg)
@@ -345,7 +360,14 @@ func TestServingResponse(t *testing.T) {
 		t.Log("exchanged response message")
 		t.Fatal()
 	}
-	s.Unsafe = true
+
+	s.Shutdown()
+	s, addrstr, err = RunLocalUDPServerUnsafe("127.0.0.1:0")
+	if err != nil {
+		t.Fatalf("Unable to run test server: %s", err)
+	}
+	defer s.Shutdown()
+
 	m.Response = true
 	_, _, err = c.Exchange(m, addrstr)
 	if err != nil {