From cff1827e27bd31ab685c32963517dcc7f0476523 Mon Sep 17 00:00:00 2001
From: Andy Wilkinson <wilkinsona@vmware.com>
Date: Sat, 24 Jul 2021 09:43:41 +0100
Subject: [PATCH] Stabilize socketChannelClosedTriggersTunnelClose

Closes gh-27483
---
 .../boot/devtools/tunnel/client/TunnelClientTests.java         | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/tunnel/client/TunnelClientTests.java b/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/tunnel/client/TunnelClientTests.java
index da6eb662b1..1ac57b1bdb 100644
--- a/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/tunnel/client/TunnelClientTests.java
+++ b/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/tunnel/client/TunnelClientTests.java
@@ -72,7 +72,8 @@ class TunnelClientTests {
 		TunnelClient client = new TunnelClient(0, this.tunnelConnection);
 		int port = client.start();
 		SocketChannel channel = SocketChannel.open(new InetSocketAddress(port));
-		Thread.sleep(200);
+		Awaitility.await().atMost(Duration.ofSeconds(30)).until(this.tunnelConnection::getOpenedTimes,
+				(open) -> open == 1);
 		channel.close();
 		client.getServerThread().stopAcceptingConnections();
 		client.getServerThread().join(2000);