diff --git a/test/parallel/test-cluster-worker-disconnect.js b/test/parallel/test-cluster-worker-disconnect.js
index be7ce2b3bf78a9..0554671fea3b61 100644
--- a/test/parallel/test-cluster-worker-disconnect.js
+++ b/test/parallel/test-cluster-worker-disconnect.js
@@ -28,7 +28,7 @@ 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 5d3df98f3b989e..db8835abe40b15 100644
--- a/test/parallel/test-cluster-worker-exit.js
+++ b/test/parallel/test-cluster-worker-exit.js
@@ -40,7 +40,7 @@ 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 311128f1b896c5..ad06ff097896f9 100644
--- a/test/parallel/test-cluster-worker-kill.js
+++ b/test/parallel/test-cluster-worker-kill.js
@@ -36,7 +36,7 @@ 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) {