diff --git a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
index cccac81eba..3fec3c79a7 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicBetaServiceExtensionsTests.cs
@@ -451,6 +451,8 @@ public sealed class AnthropicBetaServiceExtensionsTests
 
         public IBetaService Beta => this.BetaService;
 
+        public string? WebhookKey { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
+
         public IBetaService BetaService { get; }
 
         IMessageService IAnthropicClient.Messages => new Mock<IMessageService>().Object;
@@ -491,6 +493,12 @@ public sealed class AnthropicBetaServiceExtensionsTests
 
             public global::Anthropic.Services.Beta.IVaultService Vaults => throw new NotImplementedException();
 
+            public global::Anthropic.Services.Beta.IMemoryStoreService MemoryStores => throw new NotImplementedException();
+
+            public global::Anthropic.Services.Beta.IWebhookService Webhooks => throw new NotImplementedException();
+
+            public global::Anthropic.Services.Beta.IUserProfileService UserProfiles => throw new NotImplementedException();
+
             public IBetaService WithOptions(Func<ClientOptions, ClientOptions> modifier)
             {
                 throw new NotImplementedException();
diff --git a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs
index 79844ed60a..cf882b0086 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Anthropic.UnitTests/Extensions/AnthropicClientExtensionsTests.cs
@@ -81,6 +81,8 @@ public sealed class AnthropicClientExtensionsTests
 
         public IBetaService Beta => throw new NotImplementedException();
 
+        public string? WebhookKey { get => throw new NotImplementedException(); init => throw new NotImplementedException(); }
+
         public IAnthropicClient WithOptions(Func<ClientOptions, ClientOptions> modifier)
         {
             throw new NotImplementedException();