1 files changed, 3 insertions, 8 deletions
diff --git a/test/parallel/test-cluster-listening-port.js b/test/parallel/test-cluster-listening-port.js
index 810364a926..b0fbf94990 100644
--- a/test/parallel/test-cluster-listening-port.js
+++ b/test/parallel/test-cluster-listening-port.js
@@ -5,20 +5,15 @@ var cluster = require('cluster');
 var net = require('net');
 
 if (cluster.isMaster) {
-  var port = null;
   cluster.fork();
-  cluster.on('listening', function(worker, address) {
-    port = address.port;
+  cluster.on('listening', common.mustCall(function(worker, address) {
+    const port = address.port;
     // ensure that the port is not 0 or null
     assert(port);
     // ensure that the port is numerical
     assert.strictEqual(typeof port, 'number');
     worker.kill();
-  });
-  process.on('exit', function() {
-    // ensure that the 'listening' handler has been called
-    assert(port);
-  });
+  }));
 } else {
   net.createServer(common.fail).listen(0);
 }