From b77dbbf85c2b0b1c51ad5f9f318b1910d9d1567b Mon Sep 17 00:00:00 2001
From: SergeyMenshykh <sergemenshikh@gmail.com>
Date: Fri, 13 Feb 2026 15:09:47 +0000
Subject: [PATCH] forgotten change

---
 .../ChatClient/ChatClientAgentTests.cs                           | 1 +
 1 file changed, 1 insertion(+)

diff --git a/dotnet/tests/Microsoft.Agents.AI.UnitTests/ChatClient/ChatClientAgentTests.cs b/dotnet/tests/Microsoft.Agents.AI.UnitTests/ChatClient/ChatClientAgentTests.cs
index a47a72bed4..d90fe5153a 100644
--- a/dotnet/tests/Microsoft.Agents.AI.UnitTests/ChatClient/ChatClientAgentTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.UnitTests/ChatClient/ChatClientAgentTests.cs
@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.Json.Serialization;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.Extensions.AI;