XUnitLogger will dispose of messages after test completion.

tests/GameServiceWarden.Core.Tests/XUnitLogger.cs

@@ -22,8 +22,12 @@ namespace GameServiceWarden.Core.Tests
         }
 
         public void LogMessage(string message, DateTime time, LogLevel level)
+        {
+            try
             {
                 outputHelper.WriteLine($"[{time.ToShortTimeString()}][{level.ToString()}]: {message}");
             }
+            catch (InvalidOperationException) { };
+        }
     }
 }