diff --git a/tests/BotSharp.LLM.Tests/Core/TestAgentService.cs b/tests/BotSharp.LLM.Tests/Core/TestAgentService.cs
index 50d34701d..5d4b07d04 100644
--- a/tests/BotSharp.LLM.Tests/Core/TestAgentService.cs
+++ b/tests/BotSharp.LLM.Tests/Core/TestAgentService.cs
@@ -16,7 +16,7 @@ public Task<Agent> CreateAgent(Agent agent)
             return Task.FromResult(new Agent());
         }
 
-        public Task<string> RefreshAgents()
+        public Task<string> RefreshAgents(IEnumerable<string>? agentIds = null)
         {
             return Task.FromResult("Refreshed successfully");
         }