Comment supprimer les messages d'information MVC dans le logger ?

Question

J'utilise la fonction de journalisation par défaut en combinaison avec serilog pour écrire les informations de journalisation dans un fichier. Cela fonctionne, mais je n'arrive pas à trouver comment supprimer tous les messages d'information (principalement MVC). J'ai essayé un certain nombre d'options, ajouté Logging.Filter mais aucun résultat... J'utilise VS2015 et IIS-Express.

Logger output: 
2016-06-16 19:34:52.984 +02:00 [Information] HttpContext.User merged via     AutomaticAuthentication from authenticationScheme: "Identity.Application".
2016-06-16 19:34:52.993 +02:00 [Information] Executing action method     "Test.Controllers.SurveysController.Create (Test)" with arguments (["Test.Survey"]) -     ModelState is Invalid'
2016-06-16 19:34:53.027 +02:00 [Error] this is the error I want to show in     "SurveysController"
System.DivideByZeroException: Attempted to divide by zero.
   at Test.Controllers.SurveysController.<Create>d__7.MoveNext() in     C:\Users\dummy\Documents\Visual Studio     2015\Projects\Test\src\Test\Controllers\SurveysController.cs:line 97
2016-06-16 19:34:53.061 +02:00 [Information] Executing ViewResult, running view at     path "/Views/Surveys/Create.cshtml".
2016-06-16 19:34:53.083 +02:00 [Information] Executed action     "Test.Controllers.SurveysController.Create (Test)" in 94.1372ms
2016-06-16 19:34:53.087 +02:00 [Information] Request finished in 111.506ms 200     text/html; charset=utf-8

Startup.cs:
        public void Configure(IApplicationBuilder app, IHostingEnvironment env,     ILoggerFactory loggerFactory)
        {
            loggerFactory.AddSerilog();
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug(LogLevel.Debug);

            //extra package installed to try and filter logging
            loggerFactory.WithFilter(new FilterLoggerSettings
            {
                { "Microsoft", LogLevel.Warning },
                { "System", LogLevel.Warning },
                { "Test", LogLevel.Information }
            });

appsettings.json:
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Error",       // information => error
      "System": "Error",        // information => error
      "Microsoft": "Error"      // information => error
    }