diff --git a/src/cmap/auth/gssapi.ts b/src/cmap/auth/gssapi.ts
index 430b97d213..d18cb6b360 100644
--- a/src/cmap/auth/gssapi.ts
+++ b/src/cmap/auth/gssapi.ts
@@ -1,4 +1,5 @@
 import * as dns from 'dns';
+import * as os from 'os';
 
 import { getKerberos, type Kerberos, type KerberosClient } from '../../deps';
 import { MongoInvalidArgumentError, MongoMissingCredentialsError } from '../../error';
@@ -97,7 +98,7 @@ async function makeKerberosClient(authContext: AuthContext): Promise<KerberosCli
   }
 
   const spnHost = mechanismProperties.SERVICE_HOST ?? host;
-  let spn = `${serviceName}${process.platform === 'win32' ? '/' : '@'}${spnHost}`;
+  let spn = `${serviceName}${os.platform() === 'win32' ? '/' : '@'}${spnHost}`;
   if ('SERVICE_REALM' in mechanismProperties) {
     spn = `${spn}@${mechanismProperties.SERVICE_REALM}`;
   }
diff --git a/src/cmap/handshake/client_metadata.ts b/src/cmap/handshake/client_metadata.ts
index aa5cb70e7b..cc1ad0a74e 100644
--- a/src/cmap/handshake/client_metadata.ts
+++ b/src/cmap/handshake/client_metadata.ts
@@ -157,7 +157,7 @@ export async function makeClientMetadata(
 
   // Note: order matters, os.type is last so it will be removed last if we're at maxSize
   const osInfo = new Map()
-    .set('name', process.platform)
+    .set('name', os.platform())
     .set('architecture', process.arch)
     .set('version', os.release())
     .set('type', os.type());
diff --git a/test/benchmarks/driver_bench/src/main.mts b/test/benchmarks/driver_bench/src/main.mts
index 251ae42b4b..c7789ec3cb 100644
--- a/test/benchmarks/driver_bench/src/main.mts
+++ b/test/benchmarks/driver_bench/src/main.mts
@@ -71,7 +71,7 @@ const systemInfo = () =>
     `\n- cpu: ${platform.name}`,
     `- cores: ${platform.cores}`,
     `- arch: ${os.arch()}`,
-    `- os: ${process.platform} (${os.release()})`,
+    `- os: ${os.platform()} (${os.release()})`,
     `- ram: ${platform.ram}`,
     `- node: ${process.version}`,
     `- running ${total} benchmarks`,
diff --git a/test/integration/node-specific/examples/change_streams.test.js b/test/integration/node-specific/examples/change_streams.test.js
index 90737e2ddf..90020f33d5 100644
--- a/test/integration/node-specific/examples/change_streams.test.js
+++ b/test/integration/node-specific/examples/change_streams.test.js
@@ -4,9 +4,10 @@
 const { setTimeout } = require('timers');
 const setupDatabase = require('../../shared').setupDatabase;
 const expect = require('chai').expect;
+const os = require('os');
 
 // TODO: NODE-3819: Unskip flaky MacOS/Windows tests.
-const maybeDescribe = process.platform !== 'linux' ? describe.skip : describe;
+const maybeDescribe = os.platform() !== 'linux' ? describe.skip : describe;
 maybeDescribe('examples(change-stream):', function () {
   let client;
   let db;
diff --git a/test/integration/node-specific/ipv6.test.ts b/test/integration/node-specific/ipv6.test.ts
index b3b76c8517..09157633b8 100644
--- a/test/integration/node-specific/ipv6.test.ts
+++ b/test/integration/node-specific/ipv6.test.ts
@@ -1,6 +1,6 @@
 import { expect } from 'chai';
 import * as net from 'net';
-import * as process from 'process';
+import * as os from 'os';
 import * as sinon from 'sinon';
 
 import {
@@ -16,7 +16,7 @@ describe('IPv6 Addresses', () => {
 
   beforeEach(async function () {
     if (
-      process.platform === 'linux' ||
+      os.platform() === 'linux' ||
       this.configuration.topologyType !== TopologyType.ReplicaSetWithPrimary
     ) {
       if (this.currentTest) {
diff --git a/test/integration/uri-options/uri.test.ts b/test/integration/uri-options/uri.test.ts
index dde75c48f0..6734a6ccb3 100644
--- a/test/integration/uri-options/uri.test.ts
+++ b/test/integration/uri-options/uri.test.ts
@@ -1,4 +1,5 @@
 import { expect } from 'chai';
+import * as os from 'os';
 import * as sinon from 'sinon';
 
 import { Topology } from '../../../src/sdam/topology';
@@ -45,7 +46,7 @@ describe('URI', function () {
     metadata: { requires: { topology: 'single' } },
 
     test: async function () {
-      if (process.platform === 'win32') {
+      if (os.platform() === 'win32') {
         return;
       }
 
diff --git a/test/manual/kerberos.test.ts b/test/manual/kerberos.test.ts
index 92111b2585..24007128f2 100644
--- a/test/manual/kerberos.test.ts
+++ b/test/manual/kerberos.test.ts
@@ -1,5 +1,6 @@
 import * as chai from 'chai';
 import { promises as dns } from 'dns';
+import * as os from 'os';
 import * as sinon from 'sinon';
 
 import { MongoClient } from '../../src';
@@ -50,7 +51,7 @@ describe('Kerberos', function () {
 
   context('when passing in CANONICALIZE_HOST_NAME', function () {
     beforeEach(function () {
-      if (process.platform === 'darwin') {
+      if (os.platform() === 'darwin') {
         this.currentTest.skipReason =
           'DNS does not resolve with proper CNAME record on evergreen MacOS';
         this.skip();
diff --git a/test/manual/tls_support.test.ts b/test/manual/tls_support.test.ts
index 4db67b1203..4c3bffd54f 100644
--- a/test/manual/tls_support.test.ts
+++ b/test/manual/tls_support.test.ts
@@ -4,6 +4,7 @@ import * as tls from 'node:tls';
 import { expect } from 'chai';
 import { promises as fs } from 'fs';
 import ConnectionString from 'mongodb-connection-string-url';
+import * as os from 'os';
 import * as sinon from 'sinon';
 
 import { MongoClient, type MongoClientOptions, MongoServerSelectionError } from '../../src';
@@ -36,7 +37,7 @@ describe('TLS Support', function () {
   beforeEach(function () {
     if (
       this.currentTest?.title === 'should connect with tls via url options' &&
-      process.platform === 'win32'
+      os.platform() === 'win32'
     ) {
       this.currentTest.skipReason = 'TODO(NODE-5803): Un-skip Windows TLS tests via URL';
       return this.skip();
diff --git a/test/tools/runner/filters/client_encryption_filter.ts b/test/tools/runner/filters/client_encryption_filter.ts
index 8f51f3ab2f..5a16881683 100644
--- a/test/tools/runner/filters/client_encryption_filter.ts
+++ b/test/tools/runner/filters/client_encryption_filter.ts
@@ -1,4 +1,5 @@
 import { readFile } from 'fs/promises';
+import * as os from 'os';
 import { dirname, resolve } from 'path';
 import * as process from 'process';
 import { satisfies } from 'semver';
@@ -74,7 +75,7 @@ export class ClientSideEncryptionFilter extends Filter {
     }
 
     // TODO(NODE-3401): unskip csfle tests on windows
-    if (process.env.TEST_CSFLE && process.platform !== 'win32') {
+    if (process.env.TEST_CSFLE && os.platform() !== 'win32') {
       if (this.version == null) {
         throw new Error('FLE tests must run, but mongodb client encryption was not installed.');
       }
diff --git a/test/tools/runner/filters/os_filter.ts b/test/tools/runner/filters/os_filter.ts
index 50e6201ed1..9137db9e4d 100755
--- a/test/tools/runner/filters/os_filter.ts
+++ b/test/tools/runner/filters/os_filter.ts
@@ -1,3 +1,5 @@
+import * as os from 'os';
+
 import { Filter } from './filter';
 
 /**
@@ -17,7 +19,7 @@ export class OSFilter extends Filter {
   constructor() {
     super();
     // Get environmental variables that are known
-    this.platform = process.platform;
+    this.platform = os.platform();
   }
 
   filter(test: { metadata?: MongoDBMetadataUI }) {
diff --git a/test/tools/runner/hooks/configuration.ts b/test/tools/runner/hooks/configuration.ts
index 9fdc5c6c91..d8c7d375db 100644
--- a/test/tools/runner/hooks/configuration.ts
+++ b/test/tools/runner/hooks/configuration.ts
@@ -5,6 +5,7 @@ require('source-map-support').install({
   hookRequire: true
 });
 
+import * as os from 'os';
 import { MongoClient } from '../../../../src';
 import { AlpineTestConfiguration, AstrolabeTestConfiguration, TestConfiguration } from '../config';
 import { getEnvironmentalOptions } from '../../utils';
@@ -151,7 +152,7 @@ const testConfigBeforeHook = async function () {
     topology: this.configuration.topologyType,
     version: this.configuration.buildInfo.version,
     node: process.version,
-    os: process.platform,
+    os: os.platform(),
     alpineLinux: Boolean(process.env.ALPINE),
     cryptdUri: process.env.MONGOCRYPTD_URI,
     pid: process.pid,
diff --git a/test/unit/cmap/handshake/client_metadata.test.ts b/test/unit/cmap/handshake/client_metadata.test.ts
index 87069dacc3..afdd47cad2 100644
--- a/test/unit/cmap/handshake/client_metadata.test.ts
+++ b/test/unit/cmap/handshake/client_metadata.test.ts
@@ -153,7 +153,7 @@ describe('client metadata module', () => {
           },
           os: {
             type: os.type(),
-            name: process.platform,
+            name: os.platform(),
             architecture: process.arch,
             version: os.release()
           },
@@ -179,7 +179,7 @@ describe('client metadata module', () => {
           },
           os: {
             type: os.type(),
-            name: process.platform,
+            name: os.platform(),
             architecture: process.arch,
             version: os.release()
           },
@@ -203,7 +203,7 @@ describe('client metadata module', () => {
           },
           os: {
             type: os.type(),
-            name: process.platform,
+            name: os.platform(),
             architecture: process.arch,
             version: os.release()
           },
@@ -229,7 +229,7 @@ describe('client metadata module', () => {
           },
           os: {
             type: os.type(),
-            name: process.platform,
+            name: os.platform(),
             architecture: process.arch,
             version: os.release()
           },
@@ -248,7 +248,7 @@ describe('client metadata module', () => {
           },
           os: {
             type: os.type(),
-            name: process.platform,
+            name: os.platform(),
             architecture: process.arch,
             version: os.release()
           },