diff --git a/tests/Channels/PresenceChannelTest.php b/tests/Channels/PresenceChannelTest.php
index 1749c13..26cec74 100644
--- a/tests/Channels/PresenceChannelTest.php
+++ b/tests/Channels/PresenceChannelTest.php
@@ -2,6 +2,7 @@
 
 namespace BeyondCode\LaravelWebSockets\Tests\Channels;
 
+use BeyondCode\LaravelWebSockets\Tests\Mocks\Connection;
 use BeyondCode\LaravelWebSockets\Tests\Mocks\Message;
 use BeyondCode\LaravelWebSockets\Tests\TestCase;
 use BeyondCode\LaravelWebSockets\WebSockets\Exceptions\InvalidSignature;
@@ -42,16 +43,7 @@ class PresenceChannelTest extends TestCase
             ],
         ];
 
-        $signature = "{$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),
-            ],
-        ]));
+        $message = $this->getSignedMessage($connection, 'presence-channel', $channelData);
 
         $this->pusherServer->onMessage($connection, $message);
 
@@ -71,16 +63,7 @@ class PresenceChannelTest extends TestCase
             'user_id' => 1,
         ];
 
-        $signature = "{$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),
-            ],
-        ]));
+        $message = $this->getSignedMessage($connection, 'presence-channel', $channelData);
 
         $this->pusherServer->onMessage($connection, $message);
 
@@ -88,4 +71,46 @@ class PresenceChannelTest extends TestCase
             'channel' => 'presence-channel',
         ]);
     }
+
+    /** @test */
+    public function multiple_clients_with_same_user_id_are_counted_once()
+    {
+        $this->pusherServer->onOpen($connection = $this->getWebSocketConnection());
+        $this->pusherServer->onOpen($connection2 = $this->getWebSocketConnection());
+
+        $channelName = 'presence-channel';
+        $channelData = [
+            'user_id' => $userId = 1,
+        ];
+
+        $this->pusherServer->onMessage($connection, $this->getSignedMessage($connection, $channelName, $channelData));
+        $this->pusherServer->onMessage($connection2, $this->getSignedMessage($connection2, $channelName, $channelData));
+
+        $connection2->assertSentEvent('pusher_internal:subscription_succeeded', [
+            'channel' => $channelName,
+            'data' => json_encode([
+                'presence' => [
+                    'ids' => [(string)$userId],
+                    'hash' => [
+                        (string)$userId => [],
+                    ],
+                    'count' => 1,
+                ],
+            ]),
+        ]);
+    }
+
+    private function getSignedMessage(Connection $connection, string $channelName, array $channelData): Message
+    {
+        $signature = "{$connection->socketId}:{$channelName}:" . json_encode($channelData);
+
+        return new Message(json_encode([
+            'event' => 'pusher:subscribe',
+            'data' => [
+                'auth' => $connection->app->key . ':' . hash_hmac('sha256', $signature, $connection->app->secret),
+                'channel' => $channelName,
+                'channel_data' => json_encode($channelData),
+            ],
+        ]));
+    }
 }