diff --git a/DD.Persistence.Client/Clients/Mapping/Clients/TimestampedMappingClient.cs b/DD.Persistence.Client/Clients/Mapping/Clients/TimestampedMappingClient.cs
index 8211fd0..d9ada9c 100644
--- a/DD.Persistence.Client/Clients/Mapping/Clients/TimestampedMappingClient.cs
+++ b/DD.Persistence.Client/Clients/Mapping/Clients/TimestampedMappingClient.cs
@@ -6,7 +6,7 @@ using System.Collections.Concurrent;
 using System.Reflection;
 
 namespace DD.Persistence.Client.Clients.Mapping.Clients;
-internal class TimestampedMappingClient(ITimestampedValuesClient client, Dictionary<Guid, Type>? mappingConfigs) : ITimestampedMappingClient
+public class TimestampedMappingClient(ITimestampedValuesClient client, Dictionary<Guid, Type>? mappingConfigs) : ITimestampedMappingClient
 {
     /// <inheritdoc/>
     private readonly ConcurrentDictionary<Guid, TimestampedSetMapperBase> mapperCache = new();
diff --git a/DD.Persistence.Test/DD.Persistence.Test.csproj b/DD.Persistence.Test/DD.Persistence.Test.csproj
index f71b186..43f350d 100644
--- a/DD.Persistence.Test/DD.Persistence.Test.csproj
+++ b/DD.Persistence.Test/DD.Persistence.Test.csproj
@@ -16,6 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\DD.Persistence.Client\DD.Persistence.Client.csproj" />
     <ProjectReference Include="..\DD.Persistence.Database.Postgres\DD.Persistence.Database.Postgres.csproj" />
   </ItemGroup>
 
diff --git a/DD.Persistence.Test/MappingClientsTest.cs b/DD.Persistence.Test/MappingClientsTest.cs
new file mode 100644
index 0000000..967ce45
--- /dev/null
+++ b/DD.Persistence.Test/MappingClientsTest.cs
@@ -0,0 +1,40 @@
+using DD.Persistence.Client.Clients.Interfaces;
+using DD.Persistence.Client.Clients.Mapping.Abstractions;
+using DD.Persistence.Client.Clients.Mapping.Clients;
+using DD.Persistence.Repositories;
+using DD.Persistence.Services.Interfaces;
+using NSubstitute;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DD.Persistence.Test;
+public class MappingClientsTest
+{
+    private readonly ITimestampedValuesClient timestampedValuesClient = Substitute.For<ITimestampedValuesClient>();
+    private readonly TimestampedMappingClient timestampedMappingClient;
+    public record TestDto
+    {
+        public int Id { get; set; }
+        public string? Value { get; set; }
+    }
+
+    private readonly Dictionary<Guid, Type> mappingConfigs = new Dictionary<Guid, Type>()
+    {
+        { Guid.NewGuid(), typeof(TestDto) }
+    };
+
+    public MappingClientsTest()
+    {
+        timestampedMappingClient = new TimestampedMappingClient(timestampedValuesClient, mappingConfigs);
+    }
+
+    [Fact]
+    public async void Test()
+    {
+        var discriminatorIds = mappingConfigs.Keys;
+        var result = await timestampedMappingClient.Gett(discriminatorIds, null, null, null, 0, 1, CancellationToken.None);
+    }
+}