diff --git a/GFramework.Core.Tests/Extensions/TestUnRegisterList.cs b/GFramework.Core.Tests/Extensions/TestUnRegisterList.cs
new file mode 100644
index 00000000..25ed33a6
--- /dev/null
+++ b/GFramework.Core.Tests/Extensions/TestUnRegisterList.cs
@@ -0,0 +1,15 @@
+using System.Collections.Generic;
+using GFramework.Core.Abstractions.Events;
+
+namespace GFramework.Core.Tests.Extensions;
+
+/// <summary>
+///     为 <see cref="UnRegisterListExtensionTests" /> 提供可观察的 <see cref="IUnRegisterList" /> 测试替身。
+/// </summary>
+public class TestUnRegisterList : IUnRegisterList
+{
+    /// <summary>
+    ///     获取当前测试收集到的注销项列表，供断言扩展方法是否正确追加和清空元素。
+    /// </summary>
+    public IList<IUnRegister> UnregisterList { get; } = new List<IUnRegister>();
+}
diff --git a/GFramework.Core.Tests/Extensions/UnRegisterListExtensionTests.cs b/GFramework.Core.Tests/Extensions/UnRegisterListExtensionTests.cs
index 8865fdc2..fb2d4864 100644
--- a/GFramework.Core.Tests/Extensions/UnRegisterListExtensionTests.cs
+++ b/GFramework.Core.Tests/Extensions/UnRegisterListExtensionTests.cs
@@ -1,4 +1,3 @@
-using GFramework.Core.Abstractions.Events;
 using GFramework.Core.Events;
 using GFramework.Core.Extensions;
 using NUnit.Framework;
@@ -119,14 +118,3 @@ public class UnRegisterListExtensionTests
         Assert.That(callCount, Is.EqualTo(1));
     }
 }
-
-/// <summary>
-///     测试用的UnRegisterList实现类，用于验证扩展方法功能
-/// </summary>
-public class TestUnRegisterList : IUnRegisterList
-{
-    /// <summary>
-    ///     获取或设置注销列表
-    /// </summary>
-    public IList<IUnRegister> UnregisterList { get; } = new List<IUnRegister>();
-}
\ No newline at end of file