diff --git a/src/textual/_work_decorator.py b/src/textual/_work_decorator.py
index 71bd67ac1e..e38a286571 100644
--- a/src/textual/_work_decorator.py
+++ b/src/textual/_work_decorator.py
@@ -6,7 +6,16 @@
 
 from functools import partial, wraps
 from inspect import iscoroutinefunction
-from typing import TYPE_CHECKING, Callable, Coroutine, TypeVar, Union, cast, overload
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Coroutine,
+    TypeVar,
+    Union,
+    cast,
+    overload,
+)
 
 from typing_extensions import ParamSpec, TypeAlias
 
@@ -14,7 +23,6 @@
     from .worker import Worker
 
 
-FactoryParamSpec = ParamSpec("FactoryParamSpec")
 DecoratorParamSpec = ParamSpec("DecoratorParamSpec")
 ReturnType = TypeVar("ReturnType")
 
@@ -22,7 +30,7 @@
     [
         Union[
             Callable[DecoratorParamSpec, ReturnType],
-            Callable[DecoratorParamSpec, Coroutine[None, None, ReturnType]],
+            Callable[DecoratorParamSpec, Coroutine[Any, Any, ReturnType]],
         ]
     ],
     Callable[DecoratorParamSpec, "Worker[ReturnType]"],
@@ -35,7 +43,7 @@ class WorkerDeclarationError(Exception):
 
 @overload
 def work(
-    method: Callable[FactoryParamSpec, Coroutine[None, None, ReturnType]],
+    method: Callable[DecoratorParamSpec, Coroutine[Any, Any, ReturnType]],
     *,
     name: str = "",
     group: str = "default",
@@ -48,7 +56,7 @@ def work(
 
 @overload
 def work(
-    method: Callable[FactoryParamSpec, ReturnType],
+    method: Callable[DecoratorParamSpec, ReturnType],
     *,
     name: str = "",
     group: str = "default",
@@ -68,13 +76,13 @@ def work(
     exclusive: bool = False,
     description: str | None = None,
     thread: bool = False,
-) -> Decorator[..., ReturnType]: ...
+) -> Decorator[DecoratorParamSpec, ReturnType]: ...
 
 
 def work(
     method: (
-        Callable[FactoryParamSpec, ReturnType]
-        | Callable[FactoryParamSpec, Coroutine[None, None, ReturnType]]
+        Callable[DecoratorParamSpec, ReturnType]
+        | Callable[DecoratorParamSpec, Coroutine[Any, Any, ReturnType]]
         | None
     ) = None,
     *,
@@ -84,7 +92,10 @@ def work(
     exclusive: bool = False,
     description: str | None = None,
     thread: bool = False,
-) -> Callable[FactoryParamSpec, Worker[ReturnType]] | Decorator:
+) -> (
+    Callable[DecoratorParamSpec, Worker[ReturnType]]
+    | Decorator[DecoratorParamSpec, ReturnType]
+):
     """A decorator used to create [workers](/guide/workers).
 
     Args:
@@ -102,7 +113,7 @@ def work(
     def decorator(
         method: (
             Callable[DecoratorParamSpec, ReturnType]
-            | Callable[DecoratorParamSpec, Coroutine[None, None, ReturnType]]
+            | Callable[DecoratorParamSpec, Coroutine[Any, Any, ReturnType]]
         )
     ) -> Callable[DecoratorParamSpec, Worker[ReturnType]]:
         """The decorator."""