diff --git a/ssh/agent/client_test.go b/ssh/agent/client_test.go
index e33d471..a13a650 100644
--- a/ssh/agent/client_test.go
+++ b/ssh/agent/client_test.go
@@ -180,7 +180,7 @@ func TestCert(t *testing.T) {
 // therefore is buffered (net.Pipe deadlocks if both sides start with
 // a write.)
 func netPipe() (net.Conn, net.Conn, error) {
-	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	listener, err := net.Listen("tcp", ":0")
 	if err != nil {
 		return nil, nil, err
 	}