diff --git a/src/NServiceBus.AzureFunctions.Common/FunctionEndpointConfigurationBuilder.cs b/src/NServiceBus.AzureFunctions.Common/FunctionEndpointConfigurationBuilder.cs
index 9685716..b871db4 100644
--- a/src/NServiceBus.AzureFunctions.Common/FunctionEndpointConfigurationBuilder.cs
+++ b/src/NServiceBus.AzureFunctions.Common/FunctionEndpointConfigurationBuilder.cs
@@ -88,6 +88,8 @@ static EndpointConfiguration CreateDefaultEndpointConfiguration(string endpointN
             .UsingCustomDisplayName(hostIdentifier)
             .UsingCustomIdentifier(DeterministicGuid.Create(hostIdentifier));
 
+        endpointConfiguration.CustomDiagnosticsWriter(NoOpDiagnosticsWriter);
+
         var settings = endpointConfiguration.GetSettings();
         var endpointServices = settings.GetOrCreateKeyedServiceCollection(builder.Services, endpointName);
 
@@ -96,6 +98,8 @@ static EndpointConfiguration CreateDefaultEndpointConfiguration(string endpointN
         return endpointConfiguration;
     }
 
+    static Task NoOpDiagnosticsWriter(string diagnostics, CancellationToken cancellationToken) => Task.CompletedTask;
+
     static string ResolveDefaultHostIdentifier(IConfiguration configuration)
     {
         // this would be set if running inside a function app