diff --git a/client.go b/client.go
index d6739257..4872418b 100644
--- a/client.go
+++ b/client.go
@@ -17,7 +17,7 @@ const dnsTimeout time.Duration = 2 * 1e9
 // A Conn represents a connection (which may be short lived) to a DNS server.
 type Conn struct {
 	net.Conn
-	UDPSize    uint16               // Minimum reveive buffer for UDP messages, if > 512 EDNS0, 0 MinMsgSize.
+	UDPSize    uint16            // Minimum reveive buffer for UDP messages, if > 512 EDNS0, 0 MinMsgSize.
 	TsigSecret map[string]string // Secret(s) for Tsig map[<zonename>]<base64 secret>, zonename must be fully qualified
 	rtt        time.Duration
 	t          time.Time
diff --git a/client_test.go b/client_test.go
index 90ac03a7..848f9716 100644
--- a/client_test.go
+++ b/client_test.go
@@ -131,7 +131,6 @@ func TestClientAXFRMultipleMessages(t *testing.T) {
 }
 */
 
-/*
 // not really a test, but shows how to use update leases
 func TestUpdateLeaseTSIG(t *testing.T) {
 	m := new(Msg)
@@ -154,16 +153,8 @@ func TestUpdateLeaseTSIG(t *testing.T) {
 	m.SetTsig("polvi.", HmacMD5, 300, time.Now().Unix())
 	c.TsigSecret = map[string]string{"polvi.": "pRZgBrBvI4NAHZYhxmhs/Q=="}
 
-	co := new(Conn)
-	w.client = c
-	w.addr = "127.0.0.1:53"
-	w.req = m
-
-	if err := w.dial(); err != nil {
-		t.Fail()
-	}
-	if err := w.send(m); err != nil {
+	_, _, err := c.Exchange(m, "127.0.0.1:53")
+	if err != nil {
 		t.Fail()
 	}
 }
-*/