diff --git a/dotnet/tests/Microsoft.Agents.AI.UnitTests/Compaction/ToolResultCompactionStrategyTests.cs b/dotnet/tests/Microsoft.Agents.AI.UnitTests/Compaction/ToolResultCompactionStrategyTests.cs
index a6d13fdb06..ad4fa89bb5 100644
--- a/dotnet/tests/Microsoft.Agents.AI.UnitTests/Compaction/ToolResultCompactionStrategyTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.UnitTests/Compaction/ToolResultCompactionStrategyTests.cs
@@ -1,7 +1,6 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System.Collections.Generic;
-using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.Agents.AI.Compaction;
 using Microsoft.Extensions.AI;
diff --git a/dotnet/tests/Microsoft.Agents.AI.UnitTests/Compaction/TruncationCompactionStrategyTests.cs b/dotnet/tests/Microsoft.Agents.AI.UnitTests/Compaction/TruncationCompactionStrategyTests.cs
index d884bc1b01..5d4ac003f6 100644
--- a/dotnet/tests/Microsoft.Agents.AI.UnitTests/Compaction/TruncationCompactionStrategyTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.UnitTests/Compaction/TruncationCompactionStrategyTests.cs
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System.Linq;
 using System.Threading.Tasks;