diff --git a/router_test.go b/router_test.go
index f9725ba..b3d253e 100644
--- a/router_test.go
+++ b/router_test.go
@@ -274,6 +274,15 @@ func (s SenderMock) Send(packet stanza.Packet) error {
 	return nil
 }
 
+func (s SenderMock) SendIQ(ctx context.Context, iq stanza.IQ) (chan stanza.IQ, error) {
+	out, err := xml.Marshal(iq)
+	if err != nil {
+		return nil, err
+	}
+	s.buffer.Write(out)
+	return nil, nil
+}
+
 func (s SenderMock) SendRaw(str string) error {
 	s.buffer.WriteString(str)
 	return nil
diff --git a/stanza/iq_test.go b/stanza/iq_test.go
index 93f7ebb..54a8fc5 100644
--- a/stanza/iq_test.go
+++ b/stanza/iq_test.go
@@ -42,7 +42,7 @@ func TestGenerateIqId(t *testing.T) {
 	}
 
 	iq = stanza.NewIQ(stanza.Attrs{})
-	if iq.Id != "1" {
+	if iq.Id == "" {
 		t.Error("NewIQ did not generate an Id")
 	}