diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 89751af..1633b3d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.12.0
+    rev: v0.16.1
     hooks:
       - id: ruff
         args: [--fix]
diff --git a/demo.py b/demo.py
index 0070871..54707ef 100644
--- a/demo.py
+++ b/demo.py
@@ -1,8 +1,10 @@
 import asyncio
 import contextlib
-import taskgroup
+
 import exceptiongroup
 
+import taskgroup
+
 
 class ConnectionClosedError(Exception):
     pass
diff --git a/taskgroup/__init__.py b/taskgroup/__init__.py
index 31564ec..1e7a422 100644
--- a/taskgroup/__init__.py
+++ b/taskgroup/__init__.py
@@ -4,8 +4,8 @@
 
 __version__ = "0.2.2"
 
-__all__ = ["run", "Runner", "TaskGroup", "Timeout", "timeout", "timeout_at"]
+__all__ = ["Runner", "TaskGroup", "Timeout", "run", "timeout", "timeout_at"]
 
-from .runners import run, Runner
+from .runners import Runner, run
 from .taskgroups import TaskGroup
 from .timeouts import Timeout, timeout, timeout_at
diff --git a/taskgroup/install.py b/taskgroup/install.py
index b4fd162..03733f8 100644
--- a/taskgroup/install.py
+++ b/taskgroup/install.py
@@ -1,17 +1,18 @@
-import sys
-import contextvars
 import asyncio
+import contextvars
+import sys
 import types
-from typing import cast, Optional, Type
-
-from .tasks import task_factory as _task_factory, Task as _Task
+from typing import Optional, Type, cast
 
 from typing_extensions import Self, TypeVar
 
+from .tasks import Task as _Task
+from .tasks import task_factory as _task_factory
+
 if sys.version_info >= (3, 9):
-    from collections.abc import Generator, Coroutine
+    from collections.abc import Coroutine, Generator
 else:
-    from typing import Generator, Coroutine
+    from typing import Coroutine, Generator
 
 
 UNCANCEL_DONE = object()
diff --git a/taskgroup/runners.py b/taskgroup/runners.py
index 7ccd0e1..16c08e0 100644
--- a/taskgroup/runners.py
+++ b/taskgroup/runners.py
@@ -6,15 +6,14 @@
 
 __all__ = ("Runner", "run")
 
-import sys
-
 import collections.abc
 import contextvars
 import enum
 import functools
 import signal
+import sys
 import threading
-from asyncio import AbstractEventLoop, coroutines, events, exceptions, tasks, constants
+from asyncio import AbstractEventLoop, constants, coroutines, events, exceptions, tasks
 from typing import Any, TypeVar, final
 
 from typing_extensions import Self
@@ -118,7 +117,7 @@ def run(
     ) -> _T:
         """Run a coroutine inside the embedded event loop."""
         if not coroutines.iscoroutine(coro):
-            raise ValueError("a coroutine was expected, got {!r}".format(coro))
+            raise ValueError(f"a coroutine was expected, got {coro!r}")
 
         if events._get_running_loop() is not None:
             # fail fast with short traceback
diff --git a/taskgroup/taskgroups.py b/taskgroup/taskgroups.py
index 212c5fd..76f3a05 100644
--- a/taskgroup/taskgroups.py
+++ b/taskgroup/taskgroups.py
@@ -6,27 +6,24 @@
 from __future__ import annotations
 
 __all__ = ["TaskGroup"]
-import sys
-from types import TracebackType
-from asyncio import events
-from asyncio import exceptions
-from asyncio import tasks
-from asyncio import futures
 import asyncio
+import contextlib
 import contextvars
-from typing import Optional, Type
-from . import install as _install
-from . import tasks as _tasks
+import sys
+from asyncio import events, exceptions, futures, tasks
+from types import TracebackType
+from typing import Any, Optional, Type, Union
 
 from exceptiongroup import BaseExceptionGroup
-from typing import Any, Union
-from typing_extensions import Self, TypeAlias, Literal, TypeVar
-import contextlib
+from typing_extensions import Literal, Self, TypeAlias, TypeVar
+
+from . import install as _install
+from . import tasks as _tasks
 
 if sys.version_info >= (3, 9):
-    from collections.abc import Generator, Coroutine, Awaitable
+    from collections.abc import Awaitable, Coroutine, Generator
 else:
-    from typing import Generator, Coroutine, Awaitable
+    from typing import Awaitable, Coroutine, Generator
 
 
 _T = TypeVar("_T")
diff --git a/taskgroup/tasks.py b/taskgroup/tasks.py
index c30e83a..9ba238d 100644
--- a/taskgroup/tasks.py
+++ b/taskgroup/tasks.py
@@ -2,14 +2,15 @@
 
 import asyncio
 import contextvars
-from typing import Any, Union, TYPE_CHECKING, Generic
-from typing_extensions import TypeAlias, TypeVar, Self
 import sys
+from typing import TYPE_CHECKING, Any, Generic, Union
+
+from typing_extensions import Self, TypeAlias, TypeVar
 
 if sys.version_info >= (3, 9):
-    from collections.abc import Generator, Coroutine, Awaitable
+    from collections.abc import Awaitable, Coroutine, Generator
 else:
-    from typing import Generator, Coroutine, Awaitable
+    from typing import Awaitable, Coroutine, Generator
 
 _YieldT_co = TypeVar("_YieldT_co", covariant=True)
 _SendT_contra = TypeVar("_SendT_contra", contravariant=True, default=None)
diff --git a/taskgroup/timeouts.py b/taskgroup/timeouts.py
index 11457ad..4be03a0 100644
--- a/taskgroup/timeouts.py
+++ b/taskgroup/timeouts.py
@@ -6,16 +6,13 @@
 
 import contextlib
 import enum
+from asyncio import events, exceptions, tasks
 from types import TracebackType
-from typing import final, Optional, Type
-
-from asyncio import events
-from asyncio import exceptions
-from asyncio import tasks
-from . import install as _install
+from typing import Optional, Type, final
 
 from typing_extensions import Self
 
+from . import install as _install
 
 __all__ = (
     "Timeout",