diff --git a/Tests/MQTTnet.Core.Tests/Server_Tests.cs b/Tests/MQTTnet.Core.Tests/Server_Tests.cs
index c2256a60..f0df09fb 100644
--- a/Tests/MQTTnet.Core.Tests/Server_Tests.cs
+++ b/Tests/MQTTnet.Core.Tests/Server_Tests.cs
@@ -375,7 +375,7 @@ namespace MQTTnet.Tests
                     await c1.PublishAsync(message);
                 }
 
-                await Task.Delay(3000);
+                await Task.Delay(5000);
 
                 Assert.AreEqual(2000, receivedMessagesCount);
             }