--- ./lib/internal/test_runner/test.js.orig	2022-10-05 20:33:27.680099607 +0530
+++ ./lib/internal/test_runner/test.js	2022-10-05 20:35:19.150099564 +0530
@@ -44,7 +44,7 @@
 } = require('internal/validators');
 const { setTimeout } = require('timers/promises');
 const { TIMEOUT_MAX } = require('internal/timers');
-const { cpus } = require('os');
+const { numcpus } = require('os');
 const { bigint: hrtime } = process.hrtime;
 const kCallbackAndPromisePresent = 'callbackAndPromisePresent';
 const kCancelledByParent = 'cancelledByParent';
@@ -193,7 +193,7 @@
       case 'boolean':
         if (concurrency) {
           // TODO(cjihrig): Use uv_available_parallelism() once it lands.
-          this.concurrency = parent === null ? MathMax(cpus().length - 1, 1) : Infinity;
+          this.concurrency = parent === null ? MathMax(numcpus() - 1, 1) : Infinity;
         } else {
           this.concurrency = 1;
         }