diff --git a/src/Command/Serve.php b/src/Command/Serve.php
index 33567e76..af57566f 100644
--- a/src/Command/Serve.php
+++ b/src/Command/Serve.php
@@ -79,7 +79,7 @@ public function configure(): void
                 $this->defaultWorkers
             )
             ->addOption('env', 'e', InputOption::VALUE_OPTIONAL, 'It is only used for testing.')
-            ->addOption('open', 'o', InputOption::VALUE_OPTIONAL, 'Opens the serving server in the default browser.')
+            ->addOption('open', 'o', InputOption::VALUE_OPTIONAL, 'Opens the serving server in the default browser.', false)
             ->addOption('xdebug', 'x', InputOption::VALUE_OPTIONAL, 'Enables XDEBUG session.', false);
     }
 
@@ -133,13 +133,13 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         if ($this->isAddressTaken($address)) {
             if ($this->isWindows()) {
-                $io->error("Port {$port} is taken by another process");
+                $io->error("Port {$port} is taken by another process.");
                 return self::EXIT_CODE_ADDRESS_TAKEN_BY_ANOTHER_PROCESS;
             }
 
             $runningCommandPIDs = trim((string) shell_exec('lsof -ti :8080 -s TCP:LISTEN'));
             if (empty($runningCommandPIDs)) {
-                $io->error("Port {$port} is taken by another process");
+                $io->error("Port {$port} is taken by another process.");
                 return self::EXIT_CODE_ADDRESS_TAKEN_BY_ANOTHER_PROCESS;
             }
 
@@ -234,22 +234,12 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         $openInBrowser = $input->hasOption('open') && $input->getOption('open') === null;
 
-        //if ($openInBrowser) {
-        //    passthru('open http://' . $address);
-        //}
+        if ($openInBrowser) {
+            passthru('open http://' . $address);
+        }
         passthru($command, $result);
-        //$descriptorspec = array(
-        //    0 => array("pipe", "r"),  // stdin - канал, из которого дочерний процесс будет читать
-        //    1 => array("pipe", "w"),  // stdout - канал, в который дочерний процесс будет записывать
-        //    2 => array("file", "/tmp/error-output.txt", "a") // stderr - файл для записи
-        //);
-
-        //$cwd = dirname($documentRoot);
-        //$process = proc_open($command, $descriptorspec, $cwd);
-        //
-        //var_dump($process);
-
-        return 0;
+
+        return $result;
     }
 
     /**
diff --git a/tests/ServeCommandTest.php b/tests/ServeCommandTest.php
index e71d42bf..f8b5b52c 100644
--- a/tests/ServeCommandTest.php
+++ b/tests/ServeCommandTest.php
@@ -4,6 +4,7 @@
 
 namespace Yiisoft\Yii\Console\Tests;
 
+use RuntimeException;
 use Symfony\Component\Console\Tester\CommandCompletionTester;
 use Symfony\Component\Console\Tester\CommandTester;
 use Yiisoft\Yii\Console\Command\Serve;
@@ -124,10 +125,17 @@ public function testErrorWhenAddressIsTaken(): void
                 $output
             );
         } else {
-            $socket = socket_create_listen(8080);
+            $sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
+
+            $address = '127.0.0.1';
+            $port = 8081;
+            socket_bind($sock, $address, $port) or throw new RuntimeException('Could not bind to address');
+
+            socket_listen($sock);
 
             $commandCreate->execute([
-                'address' => '127.0.0.1:8080',
+                'address' => '127.0.0.1',
+                '--port' => $port,
                 '--docroot' => 'tests',
                 '--env' => 'test',
             ]);
@@ -137,11 +145,10 @@ public function testErrorWhenAddressIsTaken(): void
             $this->assertSame(Serve::EXIT_CODE_ADDRESS_TAKEN_BY_ANOTHER_PROCESS, $commandCreate->getStatusCode());
 
             $this->assertStringContainsString(
-                '[ERROR] http://127.0.0.1:8080 is taken by another process.',
+                '[ERROR] Port ' . $port . ' is taken by another process.',
                 $output
             );
-
-            socket_close($socket);
+            socket_close($sock);
         }
     }