From 0a288204b86334859f1b2102cce3cac928c0844c Mon Sep 17 00:00:00 2001
From: Daijiro Wachi <daijiro.wachi@gmail.com>
Date: Sat, 6 Jun 2026 20:50:29 +0900
Subject: [PATCH] test: validate ERR_INVALID_THIS for scheduler methods

Signed-off-by: Daijiro Wachi <daijiro.wachi@gmail.com>
---
 test/parallel/test-timers-promises-scheduler.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/test/parallel/test-timers-promises-scheduler.js b/test/parallel/test-timers-promises-scheduler.js
index 0855db34b1b405..4211bf8863f719 100644
--- a/test/parallel/test-timers-promises-scheduler.js
+++ b/test/parallel/test-timers-promises-scheduler.js
@@ -49,3 +49,17 @@ testCancelableWait2().then(common.mustCall());
 assert.throws(() => new scheduler.constructor(), {
   code: 'ERR_ILLEGAL_CONSTRUCTOR',
 });
+
+assert.throws(() => {
+  scheduler.yield.call({});
+}, {
+  code: 'ERR_INVALID_THIS',
+  message: /Scheduler/,
+});
+
+assert.throws(() => {
+  scheduler.wait.call({}, 10);
+}, {
+  code: 'ERR_INVALID_THIS',
+  message: /Scheduler/,
+});