diff --git a/tests/BuildFlow.Scripting.Tests/ScriptTypeRegistryTests.cs b/tests/BuildFlow.Scripting.Tests/ScriptTypeRegistryTests.cs
index 9a37f6f..07cc605 100644
--- a/tests/BuildFlow.Scripting.Tests/ScriptTypeRegistryTests.cs
+++ b/tests/BuildFlow.Scripting.Tests/ScriptTypeRegistryTests.cs
@@ -88,7 +88,7 @@ public class ScriptTypeRegistryTests
     public void BuildMeta_Extracts_Response_Type()
     {
         var all = _registry.GetAll();
-        all.Should().Contain(m => m.ResponseType is not null,
+        all.Should().Contain(m => m.ResponseType != null,
             "至少一个类型实现了 IRequest<T>，应解析出非空 ResponseType");
     }