diff --git a/LeaderboardBackend.Test/Lib/TestInitCommonFields.cs b/LeaderboardBackend.Test/Lib/TestInitCommonFields.cs
index 07d51fe0..ead004fd 100644
--- a/LeaderboardBackend.Test/Lib/TestInitCommonFields.cs
+++ b/LeaderboardBackend.Test/Lib/TestInitCommonFields.cs
@@ -1,18 +1,27 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using LeaderboardBackend.Models.Entities;
+using NodaTime;
+using NodaTime.Serialization.SystemTextJson;
 
 namespace LeaderboardBackend.Test.Lib;
 
 internal record TestInitCommonFields
 {
-    public static JsonSerializerOptions JsonSerializerOptions { get; } =
-        new()
+    public static JsonSerializerOptions JsonSerializerOptions { get; private set; }
+
+    static TestInitCommonFields()
+    {
+        JsonSerializerOptions = new(JsonSerializerDefaults.Web)
         {
             ReferenceHandler = ReferenceHandler.IgnoreCycles,
-            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
         };
 
+        JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter());
+        JsonSerializerOptions.ConfigureForNodaTime(DateTimeZoneProviders.Tzdb);
+    }
+
     public static User Admin { get; } =
         new()
         {