diff --git a/asyncstdlib/builtins.py b/asyncstdlib/builtins.py
index 2d35a0c..48f2553 100644
--- a/asyncstdlib/builtins.py
+++ b/asyncstdlib/builtins.py
@@ -164,7 +164,7 @@ async def zip(
 
 
 async def _zip_inner(
-    aiters: Tuple[AsyncIterator[T], ...]
+    aiters: Tuple[AsyncIterator[T], ...],
 ) -> AsyncIterator[Tuple[T, ...]]:
     """Direct zip transposing tuple-of-iterators to iterator-of-tuples"""
     try:
@@ -175,7 +175,7 @@ async def _zip_inner(
 
 
 async def _zip_inner_strict(
-    aiters: Tuple[AsyncIterator[T], ...]
+    aiters: Tuple[AsyncIterator[T], ...],
 ) -> AsyncIterator[Tuple[T, ...]]:
     """Length aware zip checking that all iterators are equal length"""
     # track index of the last iterator we tried to anext
diff --git a/asyncstdlib/builtins.pyi b/asyncstdlib/builtins.pyi
index 9039124..e4cf345 100644
--- a/asyncstdlib/builtins.pyi
+++ b/asyncstdlib/builtins.pyi
@@ -231,7 +231,7 @@ async def tuple(iterable: AnyIterable[T]) -> builtins.tuple[T, ...]: ...
 async def dict() -> builtins.dict[Any, Any]: ...
 @overload
 async def dict(
-    iterable: AnyIterable[builtins.tuple[HK, T]]
+    iterable: AnyIterable[builtins.tuple[HK, T]],
 ) -> builtins.dict[HK, T]: ...
 @overload
 async def dict(
diff --git a/asyncstdlib/contextlib.py b/asyncstdlib/contextlib.py
index e467c4d..0e0d39d 100644
--- a/asyncstdlib/contextlib.py
+++ b/asyncstdlib/contextlib.py
@@ -28,7 +28,7 @@
 
 
 def contextmanager(
-    func: Callable[..., AsyncGenerator[T, None]]
+    func: Callable[..., AsyncGenerator[T, None]],
 ) -> Callable[..., AsyncContextManager[T]]:
     r"""
     Create an asynchronous context manager out of an asynchronous generator function
diff --git a/asyncstdlib/contextlib.pyi b/asyncstdlib/contextlib.pyi
index e6e683b..26a71b4 100644
--- a/asyncstdlib/contextlib.pyi
+++ b/asyncstdlib/contextlib.pyi
@@ -55,7 +55,7 @@ class ContextDecorator(AsyncContextManager[T], metaclass=ABCMeta):
 P = ParamSpec("P")
 
 def contextmanager(
-    func: Callable[P, AsyncGenerator[T, None]]
+    func: Callable[P, AsyncGenerator[T, None]],
 ) -> Callable[P, ContextDecorator[T]]: ...
 
 class closing(Generic[AClose]):
diff --git a/asyncstdlib/functools.py b/asyncstdlib/functools.py
index a035b12..2f8b83c 100644
--- a/asyncstdlib/functools.py
+++ b/asyncstdlib/functools.py
@@ -270,7 +270,9 @@ def decorator(
 
         return decorator
 
-    if not iscoroutinefunction(type_or_getter):
+    if not iscoroutinefunction(
+        type_or_getter  # pyright: ignore[reportUnknownArgumentType]
+    ):
         raise ValueError("cached_property can only be used with a coroutine function")
 
     return CachedProperty(type_or_getter)