diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c9e3485..38d8f5d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -991,71 +991,19 @@ def test_ignore_dependences():
 
 Function as Dependency
 
-```python
-def get_user(session: Session, token: Token) -> Ignore[Any]:
-    ...
-```
+a function with its return type Annotated by `Ignore` is considered a pure function dependency, instead of a factory.
 
 
 ```python
-def validate_admin(user: Annotated[User, get_user]):
+@dg.node
+def get_user(session: Session, token: Token) -> Ignore[User]:
     ...
 ```
 
-<!-- 
-# TODO: are FnDep nodes?
-if so, we need to define new type of node
-```python
-class FnDepNode:
-    factory: Callable[P, ...]
-    factory_type: Literal["function", "resource"]
-    dependencies: Dependencies
-    config: NodeConfig
-```
-
-
-```
-def resolve_params(self, function):
-    require_scope, unresolved = self.analyze_params(function)
-    if require_scope:
-        raise OutOfScopeError
-    params = {}
-    for pname, ptype in unresolved:
-        params[pname] = self.resolve(ptype)
-    return params
-
-async def resolve_afunction(self, function): ...
-```
-
-then we can rewrite entry as such
+which means that, `get_user` won't be used to resolve `User`. 
 
 ```python
-@wraps(func)
-async def _async_scoped_wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
-    async with self.scope() as scope:
-        params = await scope.aresolve_params(function, ignore=kwargs)
-        await scope.aresolve_function(*args, **(params|kwargs))
-
-```
-
-or 
-
-we introduce `FuncReturn` Mark
-
-```python
-def get_user(session: Session, token: Token) -> Fndep[User]:
+def validate_admin(user: Annotated[User, get_user])->Ignore[Any]:
     ...
-
-dg.resolve(get_user)
 ```
 
-FuncReturn can be Any
-
-
-
-The biggest difference between Funcdep and factory is that
-factory is associated with a type where Fndep is not.
-
-in short, 
-
-dg.resolve(User) won't call get_user -->
\ No newline at end of file
diff --git a/ididi/_type_resolve.py b/ididi/_type_resolve.py
index 1b7c642d..bb0815f0 100644
--- a/ididi/_type_resolve.py
+++ b/ididi/_type_resolve.py
@@ -161,7 +161,7 @@ def resolve_factory(factory: Callable[..., T]) -> type[T]:
 
     should handle Annotate, Generator function, etc.
     """
-    sig = get_typed_signature(factory, check_return=True)
+    sig = get_typed_signature(factory)
     dependent: type[T] = resolve_annotation(sig.return_annotation)
     return dependent
 
diff --git a/tests/test_feat.py b/tests/test_feat.py
index 00819a14..a0502f49 100644
--- a/tests/test_feat.py
+++ b/tests/test_feat.py
@@ -4,3 +4,40 @@
 run test with: make feat
 """
 
+from typing import Annotated
+
+from ididi import Graph, Ignore
+
+from .test_data import Config, UserService
+
+
+class User:
+    def __init__(self, name: str, role: str):
+        self.name = name
+        self.role = role
+
+
+def get_user(config: Config) -> Ignore[User]:
+    assert isinstance(config, Config)
+    return User("user", "admin")
+
+
+def validate_admin(
+    user: Annotated[User, get_user], service: UserService
+) -> Ignore[str]:
+    assert user.role == "admin"
+    assert isinstance(service, UserService)
+    return "ok"
+
+
+async def test_resolve_function():
+    dg = Graph()
+
+    user = dg.resolve(get_user)
+    assert isinstance(user, User)
+
+
+def test_dg_resolve_params():
+    dg = Graph()
+
+    assert dg.resolve(validate_admin) == "ok"