From 0cb11f3ba197a0c98a86b5fe7e656c3aa8139e7e Mon Sep 17 00:00:00 2001
From: cyphercodes <cyphercodes@users.noreply.github.com>
Date: Tue, 28 Apr 2026 16:59:43 +0300
Subject: [PATCH 1/3] test: stabilize program tests locale

---
 tests/unit/test.program.js | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/tests/unit/test.program.js b/tests/unit/test.program.js
index e159aec3e8..c1fba06f9d 100644
--- a/tests/unit/test.program.js
+++ b/tests/unit/test.program.js
@@ -1,7 +1,7 @@
 import path from 'path';
 import fs from 'fs/promises';
 
-import { describe, it } from 'mocha';
+import { after, before, describe, it } from 'mocha';
 import git from 'git-rev-sync';
 import * as sinon from 'sinon';
 import { assert } from 'chai';
@@ -29,7 +29,32 @@ import {
 
 const { spy } = sinon;
 
+const localeEnvVars = ['LC_ALL', 'LC_MESSAGES', 'LANG', 'LANGUAGE'];
+const stableLocale = 'en_US.UTF-8';
+
 describe('program.Program', () => {
+  let originalLocaleEnv;
+
+  before(() => {
+    // yargs localizes some validation errors based on the environment locale.
+    // Keep tests that assert on these messages deterministic across systems.
+    originalLocaleEnv = {};
+    localeEnvVars.forEach((name) => {
+      originalLocaleEnv[name] = process.env[name];
+      process.env[name] = stableLocale;
+    });
+  });
+
+  after(() => {
+    localeEnvVars.forEach((name) => {
+      if (originalLocaleEnv[name] === undefined) {
+        delete process.env[name];
+      } else {
+        process.env[name] = originalLocaleEnv[name];
+      }
+    });
+  });
+
   function execProgram(program, options = {}) {
     const fakeProcess = createFakeProcess();
     const absolutePackageDir = path.join(

From 3e5027242891b765e66b4d3ea329284189ea7042 Mon Sep 17 00:00:00 2001
From: cyphercodes <cyphercodes@users.noreply.github.com>
Date: Thu, 21 May 2026 20:45:19 +0300
Subject: [PATCH 2/3] test: only set LC_ALL for locale-stable program tests

---
 tests/unit/test.program.js | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/tests/unit/test.program.js b/tests/unit/test.program.js
index c1fba06f9d..a0c0774e3d 100644
--- a/tests/unit/test.program.js
+++ b/tests/unit/test.program.js
@@ -29,30 +29,24 @@ import {
 
 const { spy } = sinon;
 
-const localeEnvVars = ['LC_ALL', 'LC_MESSAGES', 'LANG', 'LANGUAGE'];
 const stableLocale = 'en_US.UTF-8';
 
 describe('program.Program', () => {
-  let originalLocaleEnv;
+  let originalLcAll;
 
   before(() => {
     // yargs localizes some validation errors based on the environment locale.
     // Keep tests that assert on these messages deterministic across systems.
-    originalLocaleEnv = {};
-    localeEnvVars.forEach((name) => {
-      originalLocaleEnv[name] = process.env[name];
-      process.env[name] = stableLocale;
-    });
+    originalLcAll = process.env.LC_ALL;
+    process.env.LC_ALL = stableLocale;
   });
 
   after(() => {
-    localeEnvVars.forEach((name) => {
-      if (originalLocaleEnv[name] === undefined) {
-        delete process.env[name];
-      } else {
-        process.env[name] = originalLocaleEnv[name];
-      }
-    });
+    if (originalLcAll === undefined) {
+      delete process.env.LC_ALL;
+    } else {
+      process.env.LC_ALL = originalLcAll;
+    }
   });
 
   function execProgram(program, options = {}) {

From 6f8f71341cdda7dc5ac71b88d61469b5cf22c185 Mon Sep 17 00:00:00 2001
From: cyphercodes <cyphercodes@users.noreply.github.com>
Date: Sun, 24 May 2026 03:26:23 +0300
Subject: [PATCH 3/3] test: inline locale test value

---
 tests/unit/test.program.js | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tests/unit/test.program.js b/tests/unit/test.program.js
index a0c0774e3d..15cb07fcbb 100644
--- a/tests/unit/test.program.js
+++ b/tests/unit/test.program.js
@@ -29,8 +29,6 @@ import {
 
 const { spy } = sinon;
 
-const stableLocale = 'en_US.UTF-8';
-
 describe('program.Program', () => {
   let originalLcAll;
 
@@ -38,7 +36,7 @@ describe('program.Program', () => {
     // yargs localizes some validation errors based on the environment locale.
     // Keep tests that assert on these messages deterministic across systems.
     originalLcAll = process.env.LC_ALL;
-    process.env.LC_ALL = stableLocale;
+    process.env.LC_ALL = 'en_US.UTF-8';
   });
 
   after(() => {