diff --git a/pytypest/_case.py b/pytypest/_case.py
index 41196c5..663b920 100644
--- a/pytypest/_case.py
+++ b/pytypest/_case.py
@@ -2,6 +2,7 @@
 
 import dataclasses
 from typing import Any, Generic, TypeVar
+
 from typing_extensions import ParamSpec
 
 
diff --git a/pytypest/_fixture.py b/pytypest/_fixture.py
index 0708c01..ece0b6c 100644
--- a/pytypest/_fixture.py
+++ b/pytypest/_fixture.py
@@ -4,6 +4,7 @@
 from dataclasses import dataclass, field
 from enum import Enum
 from typing import Callable, Generic, Iterator, Literal, TypeVar
+
 from typing_extensions import ParamSpec
 
 from ._manager import defer
diff --git a/pytypest/_fixture_factory.py b/pytypest/_fixture_factory.py
index 1151742..bee3625 100644
--- a/pytypest/_fixture_factory.py
+++ b/pytypest/_fixture_factory.py
@@ -9,6 +9,7 @@
 
 if TYPE_CHECKING:
     from typing import Callable, Iterator, Literal, TypeVar
+
     from typing_extensions import ParamSpec
 
     R = TypeVar('R')
diff --git a/pytypest/_parametrize.py b/pytypest/_parametrize.py
index 1e3fdbd..5629868 100644
--- a/pytypest/_parametrize.py
+++ b/pytypest/_parametrize.py
@@ -2,9 +2,9 @@
 
 import inspect
 from typing import TYPE_CHECKING, Callable
-from typing_extensions import ParamSpec
 
 import pytest
+from typing_extensions import ParamSpec
 
 from ._case import Case
 
diff --git a/pytypest/experimental/_attr.py b/pytypest/experimental/_attr.py
index 6ba7dfe..a9591b7 100644
--- a/pytypest/experimental/_attr.py
+++ b/pytypest/experimental/_attr.py
@@ -2,6 +2,7 @@
 
 from dataclasses import dataclass
 from typing import TYPE_CHECKING, Any, Generic, TypeVar, overload
+
 from typing_extensions import ParamSpec