diff --git a/SystemExtensionsTests/Collections/AVLTreeTests.cs b/SystemExtensionsTests/Collections/AVLTreeTests.cs
index 629fd62..aa7a62d 100644
--- a/SystemExtensionsTests/Collections/AVLTreeTests.cs
+++ b/SystemExtensionsTests/Collections/AVLTreeTests.cs
@@ -1,10 +1,6 @@
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using SystemExtensions.Collections;
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Runtime.Serialization.Formatters.Binary;
 using System.IO;