diff --git a/test/parallel/test-cluster-concurrent-disconnect.js b/test/parallel/test-cluster-concurrent-disconnect.js
index e3771a0a4fdcb0..c2ba7b43447733 100644
--- a/test/parallel/test-cluster-concurrent-disconnect.js
+++ b/test/parallel/test-cluster-concurrent-disconnect.js
@@ -10,7 +10,7 @@ const os = require('os');
 
 if (cluster.isPrimary) {
   const workers = [];
-  const numCPUs = os.cpus().length;
+  const numCPUs = os.availableParallelism();
   let waitOnline = numCPUs;
   for (let i = 0; i < numCPUs; i++) {
     const worker = cluster.fork();
diff --git a/test/parallel/test-gc-http-client-connaborted.js b/test/parallel/test-gc-http-client-connaborted.js
index fd276d30e2beb1..e9282653f2c132 100644
--- a/test/parallel/test-gc-http-client-connaborted.js
+++ b/test/parallel/test-gc-http-client-connaborted.js
@@ -8,7 +8,7 @@ const onGC = require('../common/ongc');
 const http = require('http');
 const os = require('os');
 
-const cpus = os.cpus().length;
+const cpus = os.availableParallelism();
 let createClients = true;
 let done = 0;
 let count = 0;
diff --git a/test/parallel/test-gc-net-timeout.js b/test/parallel/test-gc-net-timeout.js
index 6b9d51c98d0e84..dfb2bbfd92ac55 100644
--- a/test/parallel/test-gc-net-timeout.js
+++ b/test/parallel/test-gc-net-timeout.js
@@ -26,7 +26,7 @@ function serverHandler(sock) {
   }, 100);
 }
 
-const cpus = os.cpus().length;
+const cpus = os.availableParallelism();
 let createClients = true;
 let done = 0;
 let count = 0;
diff --git a/test/parallel/test-worker-memory.js b/test/parallel/test-worker-memory.js
index 19b89d4321d6d7..8c38409a26bab1 100644
--- a/test/parallel/test-worker-memory.js
+++ b/test/parallel/test-worker-memory.js
@@ -7,7 +7,7 @@ const assert = require('assert');
 const util = require('util');
 const { Worker } = require('worker_threads');
 
-let numWorkers = +process.env.JOBS || require('os').cpus().length;
+let numWorkers = +process.env.JOBS || require('os').availableParallelism();
 if (numWorkers > 20) {
   // Cap the number of workers at 20 (as an even divisor of 60 used as
   // the total number of workers started) otherwise the test fails on
diff --git a/test/pummel/test-policy-integrity-dep.js b/test/pummel/test-policy-integrity-dep.js
index 02f24d02a23544..cbccc60cdb4468 100644
--- a/test/pummel/test-policy-integrity-dep.js
+++ b/test/pummel/test-policy-integrity-dep.js
@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];
diff --git a/test/pummel/test-policy-integrity-parent-commonjs.js b/test/pummel/test-policy-integrity-parent-commonjs.js
index 425abe38ebd9fb..2e77786e3b925f 100644
--- a/test/pummel/test-policy-integrity-parent-commonjs.js
+++ b/test/pummel/test-policy-integrity-parent-commonjs.js
@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];
diff --git a/test/pummel/test-policy-integrity-parent-module.js b/test/pummel/test-policy-integrity-parent-module.js
index dda800dc3652fc..1c1c8cbbb47cd8 100644
--- a/test/pummel/test-policy-integrity-parent-module.js
+++ b/test/pummel/test-policy-integrity-parent-module.js
@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];
diff --git a/test/pummel/test-policy-integrity-parent-no-package-json.js b/test/pummel/test-policy-integrity-parent-no-package-json.js
index a722263e1e484a..012b2228d3eb98 100644
--- a/test/pummel/test-policy-integrity-parent-no-package-json.js
+++ b/test/pummel/test-policy-integrity-parent-no-package-json.js
@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];
diff --git a/test/pummel/test-policy-integrity-worker-commonjs.js b/test/pummel/test-policy-integrity-worker-commonjs.js
index b5d49222a2f01c..bfa24cd8fd407b 100644
--- a/test/pummel/test-policy-integrity-worker-commonjs.js
+++ b/test/pummel/test-policy-integrity-worker-commonjs.js
@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];
diff --git a/test/pummel/test-policy-integrity-worker-module.js b/test/pummel/test-policy-integrity-worker-module.js
index a8a4fb2c29589f..e51e24be45883e 100644
--- a/test/pummel/test-policy-integrity-worker-module.js
+++ b/test/pummel/test-policy-integrity-worker-module.js
@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];
diff --git a/test/pummel/test-policy-integrity-worker-no-package-json.js b/test/pummel/test-policy-integrity-worker-no-package-json.js
index e5b3e3ccfabbf6..c1cfa22eb694ed 100644
--- a/test/pummel/test-policy-integrity-worker-no-package-json.js
+++ b/test/pummel/test-policy-integrity-worker-no-package-json.js
@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];
diff --git a/test/sequential/test-gc-http-client-onerror.js b/test/sequential/test-gc-http-client-onerror.js
index d5ae7fbd20c156..7574c0f9373634 100644
--- a/test/sequential/test-gc-http-client-onerror.js
+++ b/test/sequential/test-gc-http-client-onerror.js
@@ -6,7 +6,7 @@
 const common = require('../common');
 const onGC = require('../common/ongc');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function serverHandler(req, res) {
   req.resume();
diff --git a/test/sequential/test-gc-http-client-timeout.js b/test/sequential/test-gc-http-client-timeout.js
index 3472e79422d081..51dec7f043182d 100644
--- a/test/sequential/test-gc-http-client-timeout.js
+++ b/test/sequential/test-gc-http-client-timeout.js
@@ -16,7 +16,7 @@ function serverHandler(req, res) {
   }, 100);
 }
 
-const cpus = os.cpus().length;
+const cpus = os.availableParallelism();
 const numRequests = 36;
 let createClients = true;
 let done = 0;
diff --git a/test/sequential/test-gc-http-client.js b/test/sequential/test-gc-http-client.js
index 34f565c315d454..8e9d3e9e729db2 100644
--- a/test/sequential/test-gc-http-client.js
+++ b/test/sequential/test-gc-http-client.js
@@ -5,7 +5,7 @@
 const common = require('../common');
 const onGC = require('../common/ongc');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function serverHandler(req, res) {
   res.writeHead(200, { 'Content-Type': 'text/plain' });