diff --git a/test/parallel/test-cluster-worker-disconnect.js b/test/parallel/test-cluster-worker-disconnect.js
index 684fd5541eac55..c2f7e611876d9d 100644
--- a/test/parallel/test-cluster-worker-disconnect.js
+++ b/test/parallel/test-cluster-worker-disconnect.js
@@ -7,7 +7,7 @@ if (cluster.isWorker) {
   const http = require('http');
   http.Server(() => {
 
-  }).listen(common.PORT, '127.0.0.1');
+  }).listen(0, '127.0.0.1');
   const worker = cluster.worker;
   assert.strictEqual(worker.exitedAfterDisconnect, worker.suicide);
 
diff --git a/test/parallel/test-cluster-worker-exit.js b/test/parallel/test-cluster-worker-exit.js
index 1cd7b1d0f222c7..8f1eceaf9e66ac 100644
--- a/test/parallel/test-cluster-worker-exit.js
+++ b/test/parallel/test-cluster-worker-exit.js
@@ -19,7 +19,7 @@ if (cluster.isWorker) {
   server.once('listening', common.mustCall(() => {
     process.exit(EXIT_CODE);
   }));
-  server.listen(common.PORT, '127.0.0.1');
+  server.listen(0, '127.0.0.1');
 
 } else if (cluster.isMaster) {
 
diff --git a/test/parallel/test-cluster-worker-kill.js b/test/parallel/test-cluster-worker-kill.js
index 834cd62bc06916..050f61ed47b4b7 100644
--- a/test/parallel/test-cluster-worker-kill.js
+++ b/test/parallel/test-cluster-worker-kill.js
@@ -15,7 +15,7 @@ if (cluster.isWorker) {
   const server = http.Server(() => { });
 
   server.once('listening', common.mustCall(() => { }));
-  server.listen(common.PORT, '127.0.0.1');
+  server.listen(0, '127.0.0.1');
 
 } else if (cluster.isMaster) {