--- a/testing/marionette/transport.js
+++ b/testing/marionette/transport.js
@@ -816,16 +816,18 @@ ChildDebuggerTransport.prototype = {
 // messages from multiple connections to be multiplexed on a single channel.
 
 if (!this.isWorker) {
   // Main thread
   (function() {
     /**
      * A transport that uses a WorkerDebugger to send packets from the main
      * thread to a worker thread.
+     *
+     * @class WorkerDebuggerTransport
      */
     function WorkerDebuggerTransport(dbg, id) {
       this._dbg = dbg;
       this._id = id;
       this.onMessage = this._onMessage.bind(this);
     }
 
     WorkerDebuggerTransport.prototype = {
@@ -868,16 +870,18 @@ if (!this.isWorker) {
 
   }).call(this);
 } else {
   // Worker thread
   (function() {
     /**
      * A transport that uses a WorkerDebuggerGlobalScope to send packets
      * from a worker thread to the main thread.
+     *
+     * @class WorkerDebuggerTransportThread
      */
     function WorkerDebuggerTransport(scope, id) {
       this._scope = scope;
       this._id = id;
       this._onMessage = this._onMessage.bind(this);
     }
 
     WorkerDebuggerTransport.prototype = {