diff --git a/tools/gulp/task_helpers.ts b/tools/gulp/task_helpers.ts
index 9d42388bb859..54d7436d4018 100644
--- a/tools/gulp/task_helpers.ts
+++ b/tools/gulp/task_helpers.ts
@@ -188,15 +188,19 @@ export function vendorTask() {
 export function serverTask(liveReload: boolean = true,
                            streamCallback: (stream: NodeJS.ReadWriteStream) => void = null) {
   return () => {
+    const port = 4200;
+
     const stream = gulp.src('dist').pipe(gulpServer({
       livereload: liveReload,
       fallback: 'index.html',
-      port: 4200
+      port
     }));
 
     if (streamCallback) {
       streamCallback(stream);
     }
+
+    console.log(`Running app at http://localhost:${port}.`);
     return stream;
   }
 }