1 files changed, 55 insertions, 0 deletions
diff --git a/test/parallel/test-cluster-net-listen-ipv6only-false.js b/test/parallel/test-cluster-net-listen-ipv6only-false.js
new file mode 100644
index 00000000000..4d495d8faf6
--- /dev/null
+++ b/test/parallel/test-cluster-net-listen-ipv6only-false.js
@@ -0,0 +1,55 @@
+'use strict';
+
+const common = require('../common');
+if (!common.hasIPv6)
+  common.skip('no IPv6 support');
+
+const assert = require('assert');
+const cluster = require('cluster');
+const net = require('net');
+const Countdown = require('../common/countdown');
+
+// This test ensures that dual-stack support still works for cluster module
+// when `ipv6Only` is not `true`.
+const host = '::';
+const WORKER_COUNT = 3;
+
+if (cluster.isMaster) {
+  const workers = new Map();
+  let address;
+
+  const countdown = new Countdown(WORKER_COUNT, () => {
+    const socket = net.connect({
+      port: address.port,
+      host: '0.0.0.0',
+    }, common.mustCall(() => {
+      socket.destroy();
+      workers.forEach((worker) => {
+        worker.disconnect();
+      });
+    }));
+    socket.on('error', common.mustNotCall());
+  });
+
+  for (let i = 0; i < WORKER_COUNT; i += 1) {
+    const worker = cluster.fork().on('exit', common.mustCall((statusCode) => {
+      assert.strictEqual(statusCode, 0);
+    })).on('listening', common.mustCall((workerAddress) => {
+      if (!address) {
+        address = workerAddress;
+      } else {
+        assert.strictEqual(address.addressType, workerAddress.addressType);
+        assert.strictEqual(address.host, workerAddress.host);
+        assert.strictEqual(address.port, workerAddress.port);
+      }
+      countdown.dec();
+    }));
+
+    workers.set(i, worker);
+  }
+} else {
+  net.createServer().listen({
+    host,
+    port: 0,
+  }, common.mustCall());
+}