Commit c172bcd8a8e for nodejs

commit c172bcd8a8e3547b3858a0e0e0203849fcf6c491
Author: Filip Skokan <panva.ip@gmail.com>
Date:   Wed Oct 14 11:37:37 2026 +0200

    test: allow periodic flush to finish under load

    Keep the event loop alive until the periodic write drains and let the
    test runner enforce the timeout. A one-second deadline can expire while
    asynchronous file I/O is still pending on a busy CI machine.

    Refs: https://github.com/nodejs/reliability/issues/1690
    Signed-off-by: Filip Skokan <panva.ip@gmail.com>
    Assisted-by: Codex
    PR-URL: https://github.com/nodejs/node/pull/66722
    Refs: https://github.com/nodejs/reliability/issues/1686
    Refs: https://github.com/nodejs/reliability/issues/1687
    Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
    Reviewed-By: James M Snell <jasnell@gmail.com>
    Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
    Reviewed-By: Guilherme Araújo <arauujogui@gmail.com>

diff --git a/test/parallel/test-fastutf8stream-periodicflush.js b/test/parallel/test-fastutf8stream-periodicflush.js
index 4889fa8b19e..ed9f8aef883 100644
--- a/test/parallel/test-fastutf8stream-periodicflush.js
+++ b/test/parallel/test-fastutf8stream-periodicflush.js
@@ -85,13 +85,12 @@ function runTests(sync) {
       minLength: 5000,
       periodicFlush: common.platformTimeout(10),
     });
-    const timeout = setTimeout(
-      common.mustNotCall('periodic flush did not complete'),
-      common.platformTimeout(1000),
-    );
+    // Periodic flush timers are unrefed. Keep the event loop alive until the
+    // write completes, and let the test runner enforce the timeout.
+    const keepAlive = setInterval(() => {}, 1000);

     stream.once('drain', common.mustCall(() => {
-      clearTimeout(timeout);
+      clearInterval(keepAlive);
       stream.destroy();
       readFile(dest, 'utf8', common.mustSucceed((data) => {
         assert.strictEqual(data, 'periodic flush\n');