From fe4b58b2bddd85eb8032fa6dd94b18d1a4ff81ca Mon Sep 17 00:00:00 2001
From: "mergify[bot]" <37929162+mergify[bot]@users.noreply.github.com>
Date: Wed, 10 Jan 2024 09:08:21 +0000
Subject: [PATCH] fix(testutil): fix FreeTCPAddr localhost usage (backport
 #18996) (#18999)

Co-authored-by: gluax <16431709+gluax@users.noreply.github.com>
---
 testutil/network/util.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testutil/network/util.go b/testutil/network/util.go
index c940e9225d8b..072184cea25d 100644
--- a/testutil/network/util.go
+++ b/testutil/network/util.go
@@ -220,7 +220,7 @@ func writeFile(name, dir string, contents []byte) error {
 // Get a free address for a test CometBFT server
 // protocol is either tcp, http, etc
 func FreeTCPAddr() (addr, port string, closeFn func() error, err error) {
-	l, err := net.Listen("tcp", "localhost:0")
+	l, err := net.Listen("tcp", "127.0.0.1:0")
 	if err != nil {
 		return "", "", nil, err
 	}