diff --git a/src/Altinn.App.Api/Controllers/Attributes/JsonSettingsNameAttribute.cs b/src/Altinn.App.Api/Controllers/Attributes/JsonSettingsNameAttribute.cs
index 8511a495a..0e3ad9da9 100644
--- a/src/Altinn.App.Api/Controllers/Attributes/JsonSettingsNameAttribute.cs
+++ b/src/Altinn.App.Api/Controllers/Attributes/JsonSettingsNameAttribute.cs
@@ -12,3 +12,8 @@ internal JsonSettingsNameAttribute(string name)
 
     internal string Name { get; }
 }
+
+internal static class JsonSettingNames
+{
+    internal const string ALTINN_API = "AltinnApi";
+}
diff --git a/src/Altinn.App.Api/Controllers/Conventions/AltinnControllerConventions.cs b/src/Altinn.App.Api/Controllers/Conventions/AltinnControllerConventions.cs
index 1f7f87ba4..ebb4b3cdd 100644
--- a/src/Altinn.App.Api/Controllers/Conventions/AltinnControllerConventions.cs
+++ b/src/Altinn.App.Api/Controllers/Conventions/AltinnControllerConventions.cs
@@ -7,6 +7,6 @@ internal class AltinnControllerConventions : IControllerModelConvention
 {
     public void Apply(ControllerModel controller)
     {
-        controller.Filters.Add(new JsonSettingsNameAttribute("AltinnApi"));
+        controller.Filters.Add(new JsonSettingsNameAttribute(JsonSettingNames.ALTINN_API));
     }
 }
diff --git a/src/Altinn.App.Api/Extensions/ServiceCollectionExtensions.cs b/src/Altinn.App.Api/Extensions/ServiceCollectionExtensions.cs
index ddb4ad39e..0cae0cacb 100644
--- a/src/Altinn.App.Api/Extensions/ServiceCollectionExtensions.cs
+++ b/src/Altinn.App.Api/Extensions/ServiceCollectionExtensions.cs
@@ -1,5 +1,6 @@
 using System.Diagnostics;
 using Altinn.App.Api.Controllers;
+using Altinn.App.Api.Controllers.Attributes;
 using Altinn.App.Api.Controllers.Conventions;
 using Altinn.App.Api.Helpers;
 using Altinn.App.Api.Infrastructure.Filters;
@@ -50,7 +51,7 @@ public static void AddAltinnAppControllersWithViews(this IServiceCollection serv
             .AddApplicationPart(typeof(InstancesController).Assembly)
             .AddXmlSerializerFormatters()
             .AddJsonOptions(
-                "AltinnApi",
+                JsonSettingNames.ALTINN_API,
                 options =>
                 {
                     options.JsonSerializerOptions.PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase;