diff --git a/src/HttpApi/Controllers/FetchChannelController.php b/src/HttpApi/Controllers/FetchChannelController.php
index 6a24fd5..188e08c 100644
--- a/src/HttpApi/Controllers/FetchChannelController.php
+++ b/src/HttpApi/Controllers/FetchChannelController.php
@@ -15,6 +15,6 @@ class FetchChannelController extends Controller
             throw new HttpException(404, "Unknown channel `{$request->channelName}`.");
         }
 
-        return $channel->toArray();
+        return $channel->toArray($request->appId);
     }
 }
diff --git a/src/PubSub/Fake/FakeReplication.php b/src/PubSub/Fake/FakeReplication.php
new file mode 100644
index 0000000..5b3e429
--- /dev/null
+++ b/src/PubSub/Fake/FakeReplication.php
@@ -0,0 +1,126 @@
+<?php
+
+namespace BeyondCode\LaravelWebSockets\PubSub\Fake;
+
+use stdClass;
+use React\EventLoop\LoopInterface;
+use React\Promise\FulfilledPromise;
+use React\Promise\PromiseInterface;
+use BeyondCode\LaravelWebSockets\PubSub\ReplicationInterface;
+
+class FakeReplication implements ReplicationInterface
+{
+    protected $channels = [];
+
+    /**
+     * Boot the pub/sub provider (open connections, initial subscriptions, etc).
+     *
+     * @param LoopInterface $loop
+     * @return self
+     */
+    public function boot(LoopInterface $loop) : ReplicationInterface
+    {
+        return $this;
+    }
+
+    /**
+     * Publish a payload on a specific channel, for a specific app.
+     *
+     * @param string $appId
+     * @param string $channel
+     * @param stdClass $payload
+     * @return bool
+     */
+    public function publish(string $appId, string $channel, stdClass $payload) : bool
+    {
+        return true;
+    }
+
+    /**
+     * Subscribe to receive messages for a channel.
+     *
+     * @param string $appId
+     * @param string $channel
+     * @return bool
+     */
+    public function subscribe(string $appId, string $channel) : bool
+    {
+        return true;
+    }
+
+    /**
+     * Unsubscribe from a channel.
+     *
+     * @param string $appId
+     * @param string $channel
+     * @return bool
+     */
+    public function unsubscribe(string $appId, string $channel) : bool
+    {
+        return true;
+    }
+
+    /**
+     * Add a member to a channel. To be called when they have
+     * subscribed to the channel.
+     *
+     * @param string $appId
+     * @param string $channel
+     * @param string $socketId
+     * @param string $data
+     */
+    public function joinChannel(string $appId, string $channel, string $socketId, string $data)
+    {
+        $this->channels["$appId:$channel"][$socketId] = $data;
+    }
+
+    /**
+     * Remove a member from the channel. To be called when they have
+     * unsubscribed from the channel.
+     *
+     * @param string $appId
+     * @param string $channel
+     * @param string $socketId
+     */
+    public function leaveChannel(string $appId, string $channel, string $socketId)
+    {
+        unset($this->channels["$appId:$channel"][$socketId]);
+        if (empty($this->channels["$appId:$channel"])) {
+            unset($this->channels["$appId:$channel"]);
+        }
+    }
+
+    /**
+     * Retrieve the full information about the members in a presence channel.
+     *
+     * @param string $appId
+     * @param string $channel
+     * @return PromiseInterface
+     */
+    public function channelMembers(string $appId, string $channel) : PromiseInterface
+    {
+        $data = array_map(function ($user) {
+            return json_decode($user);
+        }, $this->channels["$appId:$channel"]);
+
+        return new FulfilledPromise($data);
+    }
+
+    /**
+     * Get the amount of users subscribed for each presence channel.
+     *
+     * @param string $appId
+     * @param array $channelNames
+     * @return PromiseInterface
+     */
+    public function channelMemberCounts(string $appId, array $channelNames) : PromiseInterface
+    {
+        $data = [];
+
+        foreach ($channelNames as $channel) {
+            $data[$channel] = count($this->channels["$appId:$channel"]);
+        }
+
+        return new FulfilledPromise($data);
+    }
+}
diff --git a/src/PubSub/Redis/RedisClient.php b/src/PubSub/Redis/RedisClient.php
index a2ea8db..4cc3e18 100644
--- a/src/PubSub/Redis/RedisClient.php
+++ b/src/PubSub/Redis/RedisClient.php
@@ -223,9 +223,9 @@ class RedisClient implements ReplicationInterface
         return $this->publishClient->__call('hgetall', ["$appId:$channel"])
             ->then(function ($members) {
                 // The data is expected as objects, so we need to JSON decode
-                return array_walk($members, function ($user) {
+                return array_map(function ($user) {
                     return json_decode($user);
-                });
+                }, $members);
             });
     }
 
diff --git a/src/PubSub/ReplicationInterface.php b/src/PubSub/ReplicationInterface.php
index e515e5c..3e120af 100644
--- a/src/PubSub/ReplicationInterface.php
+++ b/src/PubSub/ReplicationInterface.php
@@ -29,6 +29,7 @@ interface ReplicationInterface
     /**
      * Subscribe to receive messages for a channel.
      *
+     * @param string $appId
      * @param string $channel
      * @return bool
      */
@@ -37,6 +38,7 @@ interface ReplicationInterface
     /**
      * Unsubscribe from a channel.
      *
+     * @param string $appId
      * @param string $channel
      * @return bool
      */
diff --git a/src/WebSockets/Channels/Channel.php b/src/WebSockets/Channels/Channel.php
index b5c8413..87e81e0 100644
--- a/src/WebSockets/Channels/Channel.php
+++ b/src/WebSockets/Channels/Channel.php
@@ -115,7 +115,7 @@ class Channel
         if (config('websockets.replication.enabled') === true) {
             // Also broadcast via the other websocket servers
             app(ReplicationInterface::class)
-                ->publish($connection->app->id, $payload);
+                ->publish($connection->app->id, $this->channelName, $payload);
         }
 
         $this->broadcastToEveryoneExcept($payload, $connection->socketId);
@@ -139,7 +139,7 @@ class Channel
         }
     }
 
-    public function toArray()
+    public function toArray(string $appId = null)
     {
         return [
             'occupied' => count($this->subscribedConnections) > 0,
diff --git a/src/WebSockets/Channels/PresenceChannel.php b/src/WebSockets/Channels/PresenceChannel.php
index 21cab87..b382bb6 100644
--- a/src/WebSockets/Channels/PresenceChannel.php
+++ b/src/WebSockets/Channels/PresenceChannel.php
@@ -82,7 +82,7 @@ class PresenceChannel extends Channel
             ]));
         }
 
-        $this->broadcastToOthers($connection, [
+        $this->broadcastToOthers($connection, (object) [
             'event' => 'pusher_internal:member_added',
             'channel' => $this->channelName,
             'data' => json_encode($channelData),
@@ -107,7 +107,7 @@ class PresenceChannel extends Channel
                 );
         }
 
-        $this->broadcastToOthers($connection, [
+        $this->broadcastToOthers($connection, (object) [
             'event' => 'pusher_internal:member_removed',
             'channel' => $this->channelName,
             'data' => json_encode([
@@ -119,6 +119,7 @@ class PresenceChannel extends Channel
     }
 
     /**
+     * @param string|null $appId
      * @return PromiseInterface|array
      */
     public function toArray(string $appId = null)
diff --git a/tests/Channels/ChannelReplicationTest.php b/tests/Channels/ChannelReplicationTest.php
new file mode 100644
index 0000000..f8e0872
--- /dev/null
+++ b/tests/Channels/ChannelReplicationTest.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace BeyondCode\LaravelWebSockets\Tests\Channels;
+
+use BeyondCode\LaravelWebSockets\Tests\TestsReplication;
+
+class ChannelReplicationTest extends ChannelTest
+{
+    use TestsReplication;
+
+    public function setUp() : void
+    {
+        parent::setUp();
+
+        $this->setupReplication();
+    }
+}
diff --git a/tests/Channels/ChannelTest.php b/tests/Channels/ChannelTest.php
index 41272fa..ebaac75 100644
--- a/tests/Channels/ChannelTest.php
+++ b/tests/Channels/ChannelTest.php
@@ -123,7 +123,7 @@ class ChannelTest extends TestCase
 
         $channel = $this->getChannel($connection1, 'test-channel');
 
-        $channel->broadcastToOthers($connection1, [
+        $channel->broadcastToOthers($connection1, (object) [
             'event' => 'broadcasted-event',
             'channel' => 'test-channel',
         ]);
diff --git a/tests/Channels/PresenceChannelReplicationTest.php b/tests/Channels/PresenceChannelReplicationTest.php
new file mode 100644
index 0000000..7070271
--- /dev/null
+++ b/tests/Channels/PresenceChannelReplicationTest.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace BeyondCode\LaravelWebSockets\Tests\Channels;
+
+use BeyondCode\LaravelWebSockets\Tests\TestsReplication;
+
+class PresenceChannelReplicationTest extends PresenceChannelTest
+{
+    use TestsReplication;
+
+    public function setUp() : void
+    {
+        parent::setUp();
+
+        $this->setupReplication();
+    }
+}
diff --git a/tests/Channels/PresenceChannelTest.php b/tests/Channels/PresenceChannelTest.php
index 8a86560..6add602 100644
--- a/tests/Channels/PresenceChannelTest.php
+++ b/tests/Channels/PresenceChannelTest.php
@@ -59,4 +59,75 @@ class PresenceChannelTest extends TestCase
             'channel' => 'presence-channel',
         ]);
     }
+
+    /** @test */
+    public function clients_with_valid_auth_signatures_can_leave_presence_channels()
+    {
+        $connection = $this->getWebSocketConnection();
+
+        $this->pusherServer->onOpen($connection);
+
+        $channelData = [
+            'user_id' => 1,
+            'user_info' => [
+                'name' => 'Marcel',
+            ],
+        ];
+
+        $signature = "{$connection->socketId}:presence-channel:".json_encode($channelData);
+
+        $message = new Message(json_encode([
+            'event' => 'pusher:subscribe',
+            'data' => [
+                'auth' => $connection->app->key.':'.hash_hmac('sha256', $signature, $connection->app->secret),
+                'channel' => 'presence-channel',
+                'channel_data' => json_encode($channelData),
+            ],
+        ]));
+
+        $this->pusherServer->onMessage($connection, $message);
+
+        $connection->assertSentEvent('pusher_internal:subscription_succeeded', [
+            'channel' => 'presence-channel',
+        ]);
+
+        $message = new Message(json_encode([
+            'event' => 'pusher:unsubscribe',
+            'data' => [
+                'auth' => $connection->app->key.':'.hash_hmac('sha256', $signature, $connection->app->secret),
+                'channel' => 'presence-channel',
+            ],
+        ]));
+
+        $this->pusherServer->onMessage($connection, $message);
+    }
+
+    /** @test */
+    public function clients_with_valid_auth_signatures_cannot_leave_channels_they_are_not_in()
+    {
+        $connection = $this->getWebSocketConnection();
+
+        $this->pusherServer->onOpen($connection);
+
+        $channelData = [
+            'user_id' => 1,
+            'user_info' => [
+                'name' => 'Marcel',
+            ],
+        ];
+
+        $signature = "{$connection->socketId}:presence-channel:".json_encode($channelData);
+
+        $message = new Message(json_encode([
+            'event' => 'pusher:unsubscribe',
+            'data' => [
+                'auth' => $connection->app->key.':'.hash_hmac('sha256', $signature, $connection->app->secret),
+                'channel' => 'presence-channel',
+            ],
+        ]));
+
+        $this->pusherServer->onMessage($connection, $message);
+
+        $this->markTestAsPassed();
+    }
 }
diff --git a/tests/ClientProviders/AppTest.php b/tests/ClientProviders/AppTest.php
index 71393d7..73345ac 100644
--- a/tests/ClientProviders/AppTest.php
+++ b/tests/ClientProviders/AppTest.php
@@ -11,7 +11,7 @@ class AppTest extends TestCase
     /** @test */
     public function it_can_create_a_client()
     {
-        new App(1, 'appKey', 'appSecret', 'new');
+        new App(1, 'appKey', 'appSecret');
 
         $this->markTestAsPassed();
     }
@@ -21,7 +21,7 @@ class AppTest extends TestCase
     {
         $this->expectException(InvalidApp::class);
 
-        new App(1, '', 'appSecret', 'new');
+        new App(1, '', 'appSecret');
     }
 
     /** @test */
@@ -29,6 +29,6 @@ class AppTest extends TestCase
     {
         $this->expectException(InvalidApp::class);
 
-        new App(1, 'appKey', '', 'new');
+        new App(1, 'appKey', '');
     }
 }
diff --git a/tests/HttpApi/FetchChannelReplicationTest.php b/tests/HttpApi/FetchChannelReplicationTest.php
new file mode 100644
index 0000000..84f4c51
--- /dev/null
+++ b/tests/HttpApi/FetchChannelReplicationTest.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace BeyondCode\LaravelWebSockets\Tests\HttpApi;
+
+use BeyondCode\LaravelWebSockets\Tests\TestsReplication;
+
+class FetchChannelReplicationTest extends FetchChannelTest
+{
+    use TestsReplication;
+
+    public function setUp() : void
+    {
+        parent::setUp();
+
+        $this->setupReplication();
+    }
+}
diff --git a/tests/HttpApi/FetchChannelTest.php b/tests/HttpApi/FetchChannelTest.php
index 50fcaf1..dd4abf2 100644
--- a/tests/HttpApi/FetchChannelTest.php
+++ b/tests/HttpApi/FetchChannelTest.php
@@ -66,6 +66,38 @@ class FetchChannelTest extends TestCase
         ], json_decode($response->getContent(), true));
     }
 
+    /** @test */
+    public function it_returns_presence_channel_information()
+    {
+        $this->joinPresenceChannel('presence-channel');
+        $this->joinPresenceChannel('presence-channel');
+
+        $connection = new Connection();
+
+        $requestPath = '/apps/1234/channel/my-channel';
+        $routeParams = [
+            'appId' => '1234',
+            'channelName' => 'presence-channel',
+        ];
+
+        $queryString = Pusher::build_auth_query_string('TestKey', 'TestSecret', 'GET', $requestPath);
+
+        $request = new Request('GET', "{$requestPath}?{$queryString}&".http_build_query($routeParams));
+
+        $controller = app(FetchChannelController::class);
+
+        $controller->onOpen($connection, $request);
+
+        /** @var JsonResponse $response */
+        $response = array_pop($connection->sentRawData);
+
+        $this->assertSame([
+            'occupied' => true,
+            'subscription_count' => 2,
+            'user_count' => 2,
+        ], json_decode($response->getContent(), true));
+    }
+
     /** @test */
     public function it_returns_404_for_invalid_channels()
     {
diff --git a/tests/HttpApi/FetchChannelsReplicationTest.php b/tests/HttpApi/FetchChannelsReplicationTest.php
new file mode 100644
index 0000000..24eb9b4
--- /dev/null
+++ b/tests/HttpApi/FetchChannelsReplicationTest.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace BeyondCode\LaravelWebSockets\Tests\HttpApi;
+
+use BeyondCode\LaravelWebSockets\Tests\TestsReplication;
+
+class FetchChannelsReplicationTest extends FetchChannelsTest
+{
+    use TestsReplication;
+
+    public function setUp() : void
+    {
+        parent::setUp();
+
+        $this->setupReplication();
+    }
+}
diff --git a/tests/HttpApi/FetchUsersReplicationTest.php b/tests/HttpApi/FetchUsersReplicationTest.php
new file mode 100644
index 0000000..2d959a8
--- /dev/null
+++ b/tests/HttpApi/FetchUsersReplicationTest.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace BeyondCode\LaravelWebSockets\Tests\HttpApi;
+
+use BeyondCode\LaravelWebSockets\Tests\TestsReplication;
+
+class FetchUsersReplicationTest extends FetchUsersTest
+{
+    use TestsReplication;
+
+    public function setUp() : void
+    {
+        parent::setUp();
+
+        $this->setupReplication();
+    }
+}
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 14d3655..7b00aed 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -49,6 +49,7 @@ abstract class TestCase extends \Orchestra\Testbench\TestCase
                 'id' => 1234,
                 'key' => 'TestKey',
                 'secret' => 'TestSecret',
+                'host' => 'localhost',
                 'capacity' => null,
                 'enable_client_messages' => false,
                 'enable_statistics' => true,
diff --git a/tests/TestsReplication.php b/tests/TestsReplication.php
new file mode 100644
index 0000000..c0fa2f0
--- /dev/null
+++ b/tests/TestsReplication.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace BeyondCode\LaravelWebSockets\Tests;
+
+use React\EventLoop\Factory;
+use BeyondCode\LaravelWebSockets\PubSub\Fake\FakeReplication;
+use BeyondCode\LaravelWebSockets\PubSub\ReplicationInterface;
+
+trait TestsReplication
+{
+    public function setupReplication()
+    {
+        app()->singleton(ReplicationInterface::class, function () {
+            return (new FakeReplication())->boot(Factory::create());
+        });
+
+        config([
+            'websockets.replication.enabled' => true,
+            'websockets.replication.driver' => 'fake',
+        ]);
+    }
+}