diff --git a/app/Client/Client.php b/app/Client/Client.php
index fccb13e..88a3ad4 100644
--- a/app/Client/Client.php
+++ b/app/Client/Client.php
@@ -40,12 +40,12 @@ class Client
         $this->logger = $logger;
     }
 
-    public function share(string $sharedUrl, array $subdomains = [])
+    public function share(string $sharedUrl, array $subdomains = [], $serverHost = null)
     {
         $sharedUrl = $this->prepareSharedUrl($sharedUrl);
 
         foreach ($subdomains as $subdomain) {
-            $this->connectToServer($sharedUrl, $subdomain, $this->configuration->auth());
+            $this->connectToServer($sharedUrl, $subdomain, $serverHost, $this->configuration->auth());
         }
     }
 
@@ -72,7 +72,7 @@ class Client
         return $url;
     }
 
-    public function connectToServer(string $sharedUrl, $subdomain, $authToken = ''): PromiseInterface
+    public function connectToServer(string $sharedUrl, $subdomain, $serverHost = null, $authToken = ''): PromiseInterface
     {
         $deferred = new Deferred();
         $promise = $deferred->promise();
@@ -82,18 +82,18 @@ class Client
         connect($wsProtocol."://{$this->configuration->host()}:{$this->configuration->port()}/expose/control?authToken={$authToken}", [], [
             'X-Expose-Control' => 'enabled',
         ], $this->loop)
-            ->then(function (WebSocket $clientConnection) use ($sharedUrl, $subdomain, $deferred, $authToken) {
+            ->then(function (WebSocket $clientConnection) use ($sharedUrl, $subdomain, $serverHost, $deferred, $authToken) {
                 $this->connectionRetries = 0;
 
                 $connection = ControlConnection::create($clientConnection);
 
-                $connection->authenticate($sharedUrl, $subdomain);
+                $connection->authenticate($sharedUrl, $subdomain, $serverHost);
 
-                $clientConnection->on('close', function () use ($sharedUrl, $subdomain, $authToken) {
+                $clientConnection->on('close', function () use ($sharedUrl, $subdomain, $serverHost, $authToken) {
                     $this->logger->error('Connection to server closed.');
 
-                    $this->retryConnectionOrExit(function () use ($sharedUrl, $subdomain, $authToken) {
-                        $this->connectToServer($sharedUrl, $subdomain, $authToken);
+                    $this->retryConnectionOrExit(function () use ($sharedUrl, $subdomain, $serverHost, $authToken) {
+                        $this->connectToServer($sharedUrl, $subdomain, $serverHost, $authToken);
                     });
                 });
 
@@ -107,7 +107,7 @@ class Client
 
                 $connection->on('authenticated', function ($data) use ($deferred, $sharedUrl) {
                     $httpProtocol = $this->configuration->port() === 443 ? 'https' : 'http';
-                    $host = $this->configuration->host();
+                    $host = $data->server_host;
 
                     if ($httpProtocol !== 'https') {
                         $host .= ":{$this->configuration->port()}";
@@ -119,7 +119,7 @@ class Client
                     $this->logger->info("Expose-URL:\t\t{$httpProtocol}://{$data->subdomain}.{$host}");
                     $this->logger->line('');
 
-                    static::$subdomains[] = "{$httpProtocol}://{$data->subdomain}.{$host}";
+                    static::$subdomains[] = "{$httpProtocol}://{$data->subdomain}.{$data->server_host}";
 
                     $deferred->resolve($data);
                 });
diff --git a/app/Client/Connections/ControlConnection.php b/app/Client/Connections/ControlConnection.php
index 02bc31b..2d4540e 100644
--- a/app/Client/Connections/ControlConnection.php
+++ b/app/Client/Connections/ControlConnection.php
@@ -57,13 +57,14 @@ class ControlConnection
         $this->proxyManager->createTcpProxy($this->clientId, $data);
     }
 
-    public function authenticate(string $sharedHost, string $subdomain)
+    public function authenticate(string $sharedHost, string $subdomain, $serverHost = null)
     {
         $this->socket->send(json_encode([
             'event' => 'authenticate',
             'data' => [
                 'type' => 'http',
                 'host' => $sharedHost,
+                'server_host' => $serverHost,
                 'subdomain' => empty($subdomain) ? null : $subdomain,
             ],
         ]));
diff --git a/app/Client/Factory.php b/app/Client/Factory.php
index 467a61d..59ab54e 100644
--- a/app/Client/Factory.php
+++ b/app/Client/Factory.php
@@ -106,9 +106,9 @@ class Factory
         return $this;
     }
 
-    public function share($sharedUrl, $subdomain = null)
+    public function share($sharedUrl, $subdomain = null, $serverHost = null)
     {
-        app('expose.client')->share($sharedUrl, $subdomain);
+        app('expose.client')->share($sharedUrl, $subdomain, $serverHost);
 
         return $this;
     }
@@ -120,11 +120,11 @@ class Factory
         return $this;
     }
 
-    public function shareFolder(string $folder, string $name, $subdomain = null)
+    public function shareFolder(string $folder, string $name, $subdomain = null, $serverHost = null)
     {
         $host = $this->createFileServer($folder, $name);
 
-        $this->share($host, $subdomain);
+        $this->share($host, $subdomain, $serverHost);
 
         return $this;
     }
diff --git a/app/Commands/ShareCommand.php b/app/Commands/ShareCommand.php
index 452f809..c668e1d 100644
--- a/app/Commands/ShareCommand.php
+++ b/app/Commands/ShareCommand.php
@@ -7,7 +7,7 @@ use React\EventLoop\LoopInterface;
 
 class ShareCommand extends ServerAwareCommand
 {
-    protected $signature = 'share {host} {--subdomain=} {--auth=} {--dns=}';
+    protected $signature = 'share {host} {--subdomain=} {--auth=} {--dns=} {--domain=}';
 
     protected $description = 'Share a local url with a remote expose server';
 
@@ -29,7 +29,11 @@ class ShareCommand extends ServerAwareCommand
             ->setPort($this->getServerPort())
             ->setAuth($auth)
             ->createClient()
-            ->share($this->argument('host'), explode(',', $this->option('subdomain')))
+            ->share(
+                $this->argument('host'),
+                explode(',', $this->option('subdomain')),
+                $this->option('domain')
+            )
             ->createHttpServer()
             ->run();
     }
diff --git a/app/Commands/ShareCurrentWorkingDirectoryCommand.php b/app/Commands/ShareCurrentWorkingDirectoryCommand.php
index a901495..eed099a 100644
--- a/app/Commands/ShareCurrentWorkingDirectoryCommand.php
+++ b/app/Commands/ShareCurrentWorkingDirectoryCommand.php
@@ -4,7 +4,7 @@ namespace App\Commands;
 
 class ShareCurrentWorkingDirectoryCommand extends ShareCommand
 {
-    protected $signature = 'share-cwd {host?} {--subdomain=} {--auth=} {--dns=}';
+    protected $signature = 'share-cwd {host?} {--subdomain=} {--auth=} {--dns=} {--domain=}';
 
     public function handle()
     {
diff --git a/app/Commands/ShareFilesCommand.php b/app/Commands/ShareFilesCommand.php
index f29781f..52c5995 100644
--- a/app/Commands/ShareFilesCommand.php
+++ b/app/Commands/ShareFilesCommand.php
@@ -7,7 +7,7 @@ use React\EventLoop\LoopInterface;
 
 class ShareFilesCommand extends ServerAwareCommand
 {
-    protected $signature = 'share-files {folder=.} {--name=} {--subdomain=} {--auth=}';
+    protected $signature = 'share-files {folder=.} {--name=} {--subdomain=} {--auth=} {--domain=}';
 
     protected $description = 'Share a local folder with a remote expose server';
 
@@ -28,7 +28,8 @@ class ShareFilesCommand extends ServerAwareCommand
             ->shareFolder(
                 $this->argument('folder'),
                 $this->option('name') ?? '',
-                explode(',', $this->option('subdomain'))
+                explode(',', $this->option('subdomain')),
+                $this->option('domain')
             )
             ->createHttpServer()
             ->run();
diff --git a/app/Contracts/ConnectionManager.php b/app/Contracts/ConnectionManager.php
index 111c3b7..2898ded 100644
--- a/app/Contracts/ConnectionManager.php
+++ b/app/Contracts/ConnectionManager.php
@@ -8,7 +8,7 @@ use Ratchet\ConnectionInterface;
 
 interface ConnectionManager
 {
-    public function storeConnection(string $host, ?string $subdomain, ConnectionInterface $connection): ControlConnection;
+    public function storeConnection(string $host, ?string $subdomain, ?string $serverHost, ConnectionInterface $connection): ControlConnection;
 
     public function storeTcpConnection(int $port, ConnectionInterface $connection): ControlConnection;
 
@@ -20,7 +20,7 @@ interface ConnectionManager
 
     public function removeControlConnection($connection);
 
-    public function findControlConnectionForSubdomain($subdomain): ?ControlConnection;
+    public function findControlConnectionForSubdomainAndServerHost($subdomain, $serverHost): ?ControlConnection;
 
     public function findControlConnectionForClientId(string $clientId): ?ControlConnection;
 
diff --git a/app/Server/Connections/ConnectionManager.php b/app/Server/Connections/ConnectionManager.php
index 07c5d75..e2e93ab 100644
--- a/app/Server/Connections/ConnectionManager.php
+++ b/app/Server/Connections/ConnectionManager.php
@@ -6,6 +6,7 @@ use App\Contracts\ConnectionManager as ConnectionManagerContract;
 use App\Contracts\StatisticsCollector;
 use App\Contracts\SubdomainGenerator;
 use App\Http\QueryParameters;
+use App\Server\Configuration;
 use App\Server\Exceptions\NoFreePortAvailable;
 use Ratchet\ConnectionInterface;
 use React\EventLoop\LoopInterface;
@@ -48,7 +49,7 @@ class ConnectionManager implements ConnectionManagerContract
         });
     }
 
-    public function storeConnection(string $host, ?string $subdomain, ConnectionInterface $connection): ControlConnection
+    public function storeConnection(string $host, ?string $subdomain, ?string $serverHost, ConnectionInterface $connection): ControlConnection
     {
         $clientId = (string) uniqid();
 
@@ -59,6 +60,7 @@ class ConnectionManager implements ConnectionManagerContract
             $host,
             $subdomain ?? $this->subdomainGenerator->generateSubdomain(),
             $clientId,
+            $serverHost,
             $this->getAuthTokenFromConnection($connection)
         );
 
@@ -152,10 +154,10 @@ class ConnectionManager implements ConnectionManagerContract
         }
     }
 
-    public function findControlConnectionForSubdomain($subdomain): ?ControlConnection
+    public function findControlConnectionForSubdomainAndServerHost($subdomain, $serverHost): ?ControlConnection
     {
-        return collect($this->connections)->last(function ($connection) use ($subdomain) {
-            return $connection->subdomain == $subdomain;
+        return collect($this->connections)->last(function ($connection) use ($subdomain, $serverHost) {
+            return $connection->subdomain == $subdomain && $connection->serverHost === $serverHost;
         });
     }
 
diff --git a/app/Server/Connections/ControlConnection.php b/app/Server/Connections/ControlConnection.php
index 80b1d31..a85fa59 100644
--- a/app/Server/Connections/ControlConnection.php
+++ b/app/Server/Connections/ControlConnection.php
@@ -12,19 +12,21 @@ class ControlConnection
     /** @var ConnectionInterface */
     public $socket;
     public $host;
+    public $serverHost;
     public $authToken;
     public $subdomain;
     public $client_id;
     public $proxies = [];
     protected $shared_at;
 
-    public function __construct(ConnectionInterface $socket, string $host, string $subdomain, string $clientId, string $authToken = '')
+    public function __construct(ConnectionInterface $socket, string $host, string $subdomain, string $clientId, string $serverHost, string $authToken = '')
     {
         $this->socket = $socket;
         $this->host = $host;
         $this->subdomain = $subdomain;
         $this->client_id = $clientId;
         $this->authToken = $authToken;
+        $this->serverHost = $serverHost;
         $this->shared_at = now()->toDateTimeString();
     }
 
@@ -61,6 +63,7 @@ class ControlConnection
         return [
             'type' => 'http',
             'host' => $this->host,
+            'server_host' => $this->serverHost,
             'client_id' => $this->client_id,
             'auth_token' => $this->authToken,
             'subdomain' => $this->subdomain,
diff --git a/app/Server/Http/Controllers/ControlMessageController.php b/app/Server/Http/Controllers/ControlMessageController.php
index 851f747..3b32389 100644
--- a/app/Server/Http/Controllers/ControlMessageController.php
+++ b/app/Server/Http/Controllers/ControlMessageController.php
@@ -6,6 +6,7 @@ use App\Contracts\ConnectionManager;
 use App\Contracts\SubdomainRepository;
 use App\Contracts\UserRepository;
 use App\Http\QueryParameters;
+use App\Server\Configuration;
 use App\Server\Exceptions\NoFreePortAvailable;
 use Illuminate\Support\Arr;
 use Ratchet\ConnectionInterface;
@@ -26,11 +27,15 @@ class ControlMessageController implements MessageComponentInterface
     /** @var SubdomainRepository */
     protected $subdomainRepository;
 
-    public function __construct(ConnectionManager $connectionManager, UserRepository $userRepository, SubdomainRepository $subdomainRepository)
+    /** @var Configuration */
+    protected $configuration;
+
+    public function __construct(ConnectionManager $connectionManager, UserRepository $userRepository, SubdomainRepository $subdomainRepository, Configuration $configuration)
     {
         $this->connectionManager = $connectionManager;
         $this->userRepository = $userRepository;
         $this->subdomainRepository = $subdomainRepository;
+        $this->configuration = $configuration;
     }
 
     /**
@@ -93,6 +98,9 @@ class ControlMessageController implements MessageComponentInterface
         if (! isset($data->type)) {
             $data->type = 'http';
         }
+        if (! isset($data->server_host) || is_null($data->server_host)) {
+            $data->server_host = $this->configuration->hostname();
+        }
 
         $this->verifyAuthToken($connection)
             ->then(function ($user) use ($connection) {
@@ -139,14 +147,14 @@ class ControlMessageController implements MessageComponentInterface
 
     protected function handleHttpConnection(ConnectionInterface $connection, $data, $user = null)
     {
-        $this->hasValidSubdomain($connection, $data->subdomain, $user)->then(function ($subdomain) use ($data, $connection) {
+        $this->hasValidSubdomain($connection, $data->subdomain, $user, $data->server_host)->then(function ($subdomain) use ($data, $connection) {
             if ($subdomain === false) {
                 return;
             }
 
             $data->subdomain = $subdomain;
 
-            $connectionInfo = $this->connectionManager->storeConnection($data->host, $data->subdomain, $connection);
+            $connectionInfo = $this->connectionManager->storeConnection($data->host, $data->subdomain, $data->server_host, $connection);
 
             $this->connectionManager->limitConnectionLength($connectionInfo, config('expose.admin.maximum_connection_length'));
 
@@ -155,6 +163,7 @@ class ControlMessageController implements MessageComponentInterface
                 'data' => [
                     'message' => config('expose.admin.messages.message_of_the_day'),
                     'subdomain' => $connectionInfo->subdomain,
+                    'server_host' => $connectionInfo->serverHost,
                     'client_id' => $connectionInfo->client_id,
                 ],
             ]));
@@ -250,7 +259,7 @@ class ControlMessageController implements MessageComponentInterface
         return $deferred->promise();
     }
 
-    protected function hasValidSubdomain(ConnectionInterface $connection, ?string $subdomain, ?array $user): PromiseInterface
+    protected function hasValidSubdomain(ConnectionInterface $connection, ?string $subdomain, ?array $user, string $serverHost): PromiseInterface
     {
         /**
          * Check if the user can specify a custom subdomain in the first place.
@@ -271,7 +280,7 @@ class ControlMessageController implements MessageComponentInterface
          */
         if (! is_null($subdomain)) {
             return $this->subdomainRepository->getSubdomainByName($subdomain)
-                ->then(function ($foundSubdomain) use ($connection, $subdomain, $user) {
+                ->then(function ($foundSubdomain) use ($connection, $subdomain, $user, $serverHost) {
                     if (! is_null($foundSubdomain) && ! is_null($user) && $foundSubdomain['user_id'] !== $user['id']) {
                         $message = config('expose.admin.messages.subdomain_reserved');
                         $message = str_replace(':subdomain', $subdomain, $message);
@@ -287,7 +296,7 @@ class ControlMessageController implements MessageComponentInterface
                         return \React\Promise\resolve(false);
                     }
 
-                    $controlConnection = $this->connectionManager->findControlConnectionForSubdomain($subdomain);
+                    $controlConnection = $this->connectionManager->findControlConnectionForSubdomainAndServerHost($subdomain, $serverHost);
 
                     if (! is_null($controlConnection) || $subdomain === config('expose.admin.subdomain') || in_array($subdomain, config('expose.admin.reserved_subdomains', []))) {
                         $message = config('expose.admin.messages.subdomain_taken');
diff --git a/app/Server/Http/Controllers/TunnelMessageController.php b/app/Server/Http/Controllers/TunnelMessageController.php
index 3b58ae0..adbe324 100644
--- a/app/Server/Http/Controllers/TunnelMessageController.php
+++ b/app/Server/Http/Controllers/TunnelMessageController.php
@@ -41,6 +41,7 @@ class TunnelMessageController extends Controller
     public function handle(Request $request, ConnectionInterface $httpConnection)
     {
         $subdomain = $this->detectSubdomain($request);
+        $serverHost = $this->detectServerHost($request);
 
         if (is_null($subdomain)) {
             $httpConnection->send(
@@ -51,7 +52,7 @@ class TunnelMessageController extends Controller
             return;
         }
 
-        $controlConnection = $this->connectionManager->findControlConnectionForSubdomain($subdomain);
+        $controlConnection = $this->connectionManager->findControlConnectionForSubdomainAndServerHost($subdomain, $serverHost);
 
         if (is_null($controlConnection)) {
             $httpConnection->send(
@@ -69,11 +70,16 @@ class TunnelMessageController extends Controller
 
     protected function detectSubdomain(Request $request): ?string
     {
-        $subdomain = Str::before($request->getHost(), '.'.$this->configuration->hostname());
+        $subdomain = Str::before($request->getHost(), '.');
 
         return $subdomain === $request->getHost() ? null : $subdomain;
     }
 
+    protected function detectServerHost(Request $request): ?string
+    {
+        return Str::after($request->getHost(), '.');
+    }
+
     protected function sendRequestToClient(Request $request, ControlConnection $controlConnection, ConnectionInterface $httpConnection)
     {
         $request = $this->prepareRequest($request, $controlConnection);
diff --git a/tests/Feature/Server/ApiTest.php b/tests/Feature/Server/ApiTest.php
index 3bdde90..b3abd60 100644
--- a/tests/Feature/Server/ApiTest.php
+++ b/tests/Feature/Server/ApiTest.php
@@ -284,11 +284,11 @@ class ApiTest extends TestCase
 
         $connection = \Mockery::mock(IoConnection::class);
         $connection->httpRequest = new Request('GET', '/?authToken='.$createdUser->auth_token);
-        $connectionManager->storeConnection('some-host.test', 'fixed-subdomain', $connection);
+        $connectionManager->storeConnection('some-host.test', 'fixed-subdomain', 'localhost', $connection);
 
         $connection = \Mockery::mock(IoConnection::class);
         $connection->httpRequest = new Request('GET', '/?authToken=some-other-token');
-        $connectionManager->storeConnection('some-different-host.test', 'different-subdomain', $connection);
+        $connectionManager->storeConnection('some-different-host.test', 'different-subdomain', 'localhost', $connection);
 
         $connection = \Mockery::mock(IoConnection::class);
         $connection->httpRequest = new Request('GET', '/?authToken='.$createdUser->auth_token);
@@ -307,6 +307,7 @@ class ApiTest extends TestCase
         $this->assertCount(1, $users[0]->sites);
         $this->assertCount(1, $users[0]->tcp_connections);
         $this->assertSame('some-host.test', $users[0]->sites[0]->host);
+        $this->assertSame('localhost', $users[0]->sites[0]->server_host);
         $this->assertSame('fixed-subdomain', $users[0]->sites[0]->subdomain);
     }
 
@@ -319,7 +320,7 @@ class ApiTest extends TestCase
         $connection = \Mockery::mock(IoConnection::class);
         $connection->httpRequest = new Request('GET', '/?authToken=some-token');
 
-        $connectionManager->storeConnection('some-host.test', 'fixed-subdomain', $connection);
+        $connectionManager->storeConnection('some-host.test', 'fixed-subdomain', 'localhost', $connection);
 
         /** @var Response $response */
         $response = $this->await($this->browser->get('http://127.0.0.1:8080/api/sites', [
@@ -346,7 +347,7 @@ class ApiTest extends TestCase
         $connection = \Mockery::mock(IoConnection::class);
         $connection->httpRequest = new Request('GET', '/');
 
-        $connectionManager->storeConnection('some-host.test', 'fixed-subdomain', $connection);
+        $connectionManager->storeConnection('some-host.test', 'fixed-subdomain', 'localhost', $connection);
 
         /** @var Response $response */
         $response = $this->await($this->browser->get('http://127.0.0.1:8080/api/sites', [
diff --git a/tests/Feature/Server/TunnelTest.php b/tests/Feature/Server/TunnelTest.php
index e050b1b..d849f33 100644
--- a/tests/Feature/Server/TunnelTest.php
+++ b/tests/Feature/Server/TunnelTest.php
@@ -213,7 +213,7 @@ class TunnelTest extends TestCase
          * the created test HTTP server.
          */
         $client = $this->createClient();
-        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'tunnel', $user->auth_token));
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'tunnel', null, $user->auth_token));
 
         $this->assertSame('tunnel', $response->subdomain);
     }
@@ -235,7 +235,7 @@ class TunnelTest extends TestCase
          * the created test HTTP server.
          */
         $client = $this->createClient();
-        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'tunnel', $user->auth_token));
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'tunnel', null, $user->auth_token));
 
         $this->assertNotSame('tunnel', $response->subdomain);
     }
@@ -272,11 +272,56 @@ class TunnelTest extends TestCase
          * the created test HTTP server.
          */
         $client = $this->createClient();
-        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'reserved', $user->auth_token));
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'reserved', null, $user->auth_token));
 
         $this->assertSame('reserved', $response->subdomain);
     }
 
+    /** @test */
+    public function it_rejects_users_that_want_to_use_a_subdomain_that_is_already_in_use()
+    {
+        $this->app['config']['expose.admin.validate_auth_tokens'] = true;
+
+        $user = $this->createUser([
+            'name' => 'Marcel',
+            'can_specify_subdomains' => 1,
+        ]);
+
+        $this->createTestHttpServer();
+
+        $this->expectException(\UnexpectedValueException::class);
+        $client = $this->createClient();
+
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'taken', null, $user->auth_token));
+        $this->assertSame('taken', $response->subdomain);
+
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'taken', null, $user->auth_token));
+        $this->assertSame('taken', $response->subdomain);
+    }
+
+    /** @test */
+    public function it_allows_users_to_use_a_subdomain_that_is_already_in_use_on_a_different_shared_host()
+    {
+        $this->app['config']['expose.admin.validate_auth_tokens'] = true;
+
+        $user = $this->createUser([
+            'name' => 'Marcel',
+            'can_specify_subdomains' => 1,
+        ]);
+
+        $this->createTestHttpServer();
+
+        $client = $this->createClient();
+
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'taken', null, $user->auth_token));
+        $this->assertSame('localhost', $response->server_host);
+        $this->assertSame('taken', $response->subdomain);
+
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'taken', 'share.beyondco.de', $user->auth_token));
+        $this->assertSame('share.beyondco.de', $response->server_host);
+        $this->assertSame('taken', $response->subdomain);
+    }
+
     /** @test */
     public function it_allows_users_to_use_their_own_reserved_subdomains()
     {
@@ -302,7 +347,7 @@ class TunnelTest extends TestCase
          * the created test HTTP server.
          */
         $client = $this->createClient();
-        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'reserved', $user->auth_token));
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'reserved', null, $user->auth_token));
 
         $this->assertSame('reserved', $response->subdomain);
     }
@@ -363,7 +408,7 @@ class TunnelTest extends TestCase
         $this->createTestHttpServer();
 
         $client = $this->createClient();
-        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'foo', $user->auth_token));
+        $response = $this->await($client->connectToServer('127.0.0.1:8085', 'foo', null, $user->auth_token));
 
         $this->assertNotSame('foo', $response->subdomain);
     }