diff --git a/lib/os.js b/lib/os.js
index d03be051d09..b134fb93298 100644
--- a/lib/os.js
+++ b/lib/os.js
@@ -22,9 +22,13 @@
 'use strict';
 
 const {
+  ArrayPrototypePush,
   Float64Array,
   NumberParseInt,
   ObjectDefineProperties,
+  StringPrototypeEndsWith,
+  StringPrototypeSlice,
+  StringPrototypeSplit,
   SymbolToPrimitive,
 } = primordials;
 
@@ -104,7 +108,7 @@ function cpus() {
   const result = [];
   let i = 0;
   while (i < data.length) {
-    result.push({
+    ArrayPrototypePush(result, {
       model: data[i++],
       speed: data[i++],
       times: {
@@ -135,15 +139,16 @@ function tmpdir() {
     path = process.env.TEMP ||
            process.env.TMP ||
            (process.env.SystemRoot || process.env.windir) + '\\temp';
-    if (path.length > 1 && path.endsWith('\\') && !path.endsWith(':\\'))
-      path = path.slice(0, -1);
+    if (path.length > 1 && StringPrototypeEndsWith(path, '\\') &&
+        !StringPrototypeEndsWith(path, ':\\'))
+      path = StringPrototypeSlice(path, 0, -1);
   } else {
     path = safeGetenv('TMPDIR') ||
            safeGetenv('TMP') ||
            safeGetenv('TEMP') ||
            '/tmp';
-    if (path.length > 1 && path.endsWith('/'))
-      path = path.slice(0, -1);
+    if (path.length > 1 && StringPrototypeEndsWith(path, '/'))
+      path = StringPrototypeSlice(path, 0, -1);
   }
 
   return path;
@@ -177,7 +182,7 @@ function getCIDR(address, netmask, family) {
     groupLength = 16;
   }
 
-  const parts = netmask.split(split);
+  const parts = StringPrototypeSplit(netmask, split);
   for (var i = 0; i < parts.length; i++) {
     if (parts[i] !== '') {
       const binary = NumberParseInt(parts[i], range);
@@ -221,7 +226,7 @@ function networkInterfaces() {
 
     const existing = result[name];
     if (existing !== undefined)
-      existing.push(entry);
+      ArrayPrototypePush(existing, entry);
     else
       result[name] = [entry];
   }