diff --git a/config/package-is-installable/test/checkPlatform.ts b/config/package-is-installable/test/checkPlatform.ts
index 242b04a49e..996ca628d4 100644
--- a/config/package-is-installable/test/checkPlatform.ts
+++ b/config/package-is-installable/test/checkPlatform.ts
@@ -1,4 +1,4 @@
-import { expect, jest, test } from '@jest/globals'
+import { afterEach, expect, jest, test } from '@jest/globals'
 import type * as DetectLibc from 'detect-libc'
 
 const packageId = 'registry.npmjs.org/foo/1.0.0'
@@ -13,6 +13,22 @@ jest.mock('detect-libc', () => {
 
 const { checkPlatform } = await import('../lib/checkPlatform.js')
 
+const originalPlatform = Object.getOwnPropertyDescriptor(process, 'platform')!
+const originalArch = Object.getOwnPropertyDescriptor(process, 'arch')!
+
+function setPlatform (platform: NodeJS.Platform): void {
+  Object.defineProperty(process, 'platform', { ...originalPlatform, value: platform })
+}
+
+function setArch (arch: NodeJS.Architecture): void {
+  Object.defineProperty(process, 'arch', { ...originalArch, value: arch })
+}
+
+afterEach(() => {
+  Object.defineProperty(process, 'platform', originalPlatform)
+  Object.defineProperty(process, 'arch', originalArch)
+})
+
 test('target cpu wrong', () => {
   const target = {
     cpu: 'enten-cpu',
@@ -153,6 +169,7 @@ test('accept another libc', () => {
 })
 
 test('accept negated os with multi-valued supportedArchitectures', () => {
+  setPlatform('linux')
   expect(checkPlatform(packageId, { cpu: 'any', os: ['!win32'], libc: 'any' }, {
     os: ['linux', 'current'],
     cpu: ['current'],
@@ -161,6 +178,7 @@ test('accept negated os with multi-valued supportedArchitectures', () => {
 })
 
 test('accept negated cpu with multi-valued supportedArchitectures', () => {
+  setArch('x64')
   expect(checkPlatform(packageId, { cpu: ['!ia32'], os: 'any', libc: 'any' }, {
     os: ['current'],
     cpu: ['x64', 'current'],
@@ -169,6 +187,7 @@ test('accept negated cpu with multi-valued supportedArchitectures', () => {
 })
 
 test('reject negated os when any supported value matches the negation', () => {
+  setPlatform('darwin')
   const err = checkPlatform(packageId, { cpu: 'any', os: ['!win32'], libc: 'any' }, {
     os: ['win32', 'current'],
     cpu: ['current'],