diff --git a/doc/api/worker_threads.md b/doc/api/worker_threads.md
index 86374d8fcc3c81..a9fd6053d9defc 100644
--- a/doc/api/worker_threads.md
+++ b/doc/api/worker_threads.md
@@ -1265,7 +1265,9 @@ import {
 
 if (isMainThread) {
   new Worker(new URL(import.meta.url));
-  for (let n = 0; n < 1e10; n++) {}
+  for (let n = 0; n < 1e10; n++) {
+    // Looping to simulate work.
+  }
 } else {
   // This output will be blocked by the for loop in the main thread.
   console.log('foo');
@@ -1282,7 +1284,9 @@ const {
 
 if (isMainThread) {
   new Worker(__filename);
-  for (let n = 0; n < 1e10; n++) {}
+  for (let n = 0; n < 1e10; n++) {
+    // Looping to simulate work.
+  }
 } else {
   // This output will be blocked by the for loop in the main thread.
   console.log('foo');