diff --git a/lib/child_process.js b/lib/child_process.js
index a0bd01b16bde36..cdf20f87c7deb1 100644
--- a/lib/child_process.js
+++ b/lib/child_process.js
@@ -46,7 +46,7 @@ function stdioStringToArray(option) {
     case 'inherit':
       return [option, option, option, 'ipc'];
     default:
-      throw new TypeError('Incorrect value of stdio option: ' + option);
+      throw new TypeError(`Incorrect value of stdio option: ${option}`);
   }
 }
 
@@ -266,10 +266,10 @@ exports.execFile = function(file /*, args, options, callback*/) {
     }
 
     if (args.length !== 0)
-      cmd += ' ' + args.join(' ');
+      cmd += ` ${args.join(' ')}`;
 
     if (!ex) {
-      ex = new Error('Command failed: ' + cmd + '\n' + stderr);
+      ex = new Error(`Command failed: ${cmd}\n${stderr}`);
       ex.killed = child.killed || killed;
       ex.code = code < 0 ? errname(code) : code;
       ex.signal = signal;
@@ -475,7 +475,7 @@ function normalizeSpawnArguments(file, args, options) {
   var envPairs = [];
 
   for (var key in env) {
-    envPairs.push(key + '=' + env[key]);
+    envPairs.push(`${key}=${env[key]}`);
   }
 
   _convertCustomFds(options);
@@ -570,7 +570,7 @@ function checkExecSyncError(ret, args, cmd) {
     var msg = 'Command failed: ';
     msg += cmd || args.join(' ');
     if (ret.stderr && ret.stderr.length > 0)
-      msg += '\n' + ret.stderr.toString();
+      msg += `\n${ret.stderr.toString()}`;
     err = new Error(msg);
   }
   if (err) {