From d6f37e6e1bcc8641cfe4fda1aae79b1c246697df Mon Sep 17 00:00:00 2001
From: Rich Trott <rtrott@gmail.com>
Date: Thu, 19 Jul 2018 12:17:11 -0700
Subject: [PATCH] test: address flaky worker test

Make test/parallel/test-worker-message-port-transfer-closed.js more
reliable by counting ticks rather than using a single setTimeout().

Fixes: https://github.com/nodejs/node/issues/21892
---
 test/parallel/test-worker-message-port-transfer-closed.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/test/parallel/test-worker-message-port-transfer-closed.js b/test/parallel/test-worker-message-port-transfer-closed.js
index 435a3789fca724..32de1af1f97a81 100644
--- a/test/parallel/test-worker-message-port-transfer-closed.js
+++ b/test/parallel/test-worker-message-port-transfer-closed.js
@@ -50,5 +50,9 @@ testSingle(port1, port2);
 port2.close(common.mustCall(testBothClosed));
 testBothClosed();
 
-setTimeout(common.mustNotCall('The communication channel is still open'),
-           common.platformTimeout(1000)).unref();
+function tickUnref(n, fn) {
+  if (n === 0) return fn();
+  setImmediate(tickUnref, n - 1, fn).unref();
+}
+
+tickUnref(10, common.mustNotCall('The communication channel is still open'));