diff --git a/Source/MQTTnet.Tests/Clients/ManagedMqttClient/ManagedMqttClient_Tests.cs b/Source/MQTTnet.Tests/Clients/ManagedMqttClient/ManagedMqttClient_Tests.cs
index dd056471..1e9bc60a 100644
--- a/Source/MQTTnet.Tests/Clients/ManagedMqttClient/ManagedMqttClient_Tests.cs
+++ b/Source/MQTTnet.Tests/Clients/ManagedMqttClient/ManagedMqttClient_Tests.cs
@@ -621,7 +621,7 @@ namespace MQTTnet.Tests.Clients.ManagedMqttClient
         public async Task Unsubscribe_Does_Not_Hang_On_Server_Stop()
         {
             var timeout = TimeSpan.FromSeconds(2);
-            var testTimeout = timeout * 2;
+            var testTimeout = TimeSpan.FromSeconds(timeout.TotalSeconds * 2);
             const string topic = "test_topic_2";
             using (var testEnvironment = CreateTestEnvironment())
             using (var managedClient = await CreateManagedClientAsync(testEnvironment, timeout: timeout))
@@ -670,7 +670,7 @@ namespace MQTTnet.Tests.Clients.ManagedMqttClient
         public async Task Publish_Does_Not_Hang_On_Server_Error()
         {
             var timeout = TimeSpan.FromSeconds(2);
-            var testTimeout = timeout * 2;
+            var testTimeout = TimeSpan.FromSeconds(timeout.TotalSeconds * 2);
 
             const string topic = "test_topic_42";