diff --git a/docs/conf.py b/docs/conf.py
index 816b5b9..02f7925 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -10,6 +10,8 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
+from __future__ import annotations
+
 import sys
 import os
 
diff --git a/pyproject.toml b/pyproject.toml
index e0bef18..2f66b00 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,11 +65,15 @@ select = [
     "W",  # pycodestyle warnings
     "F",  # pyflakes
     "UP", # pyupgrade
+    "I002", # missing-required-import
 ]
 ignore = [
     "UP031", # printf-string-formatting, not enforced by pyupgrade
     "UP032", # f-string, not enforced by pyupgrade
 ]
 
+[tool.ruff.lint.isort]
+required-imports = ["from __future__ import annotations"]
+
 [tool.ruff.lint.pycodestyle]
 max-line-length = 120
diff --git a/src/pytestqt/__init__.py b/src/pytestqt/__init__.py
index 66b5a5f..688f95d 100644
--- a/src/pytestqt/__init__.py
+++ b/src/pytestqt/__init__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 # _version is automatically generated by setuptools_scm
 from pytestqt._version import version
 
diff --git a/src/pytestqt/exceptions.py b/src/pytestqt/exceptions.py
index 90b7f7c..bdc72da 100644
--- a/src/pytestqt/exceptions.py
+++ b/src/pytestqt/exceptions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import functools
 import sys
 import traceback
@@ -33,7 +35,7 @@ def capture_exceptions() -> Iterator[CapturedExceptions]:
 def _except_hook(
     type_: type[BaseException],
     value: BaseException,
-    tback: Optional[TracebackType],
+    tback: TracebackType | None,
     exceptions: CapturedExceptions,
 ) -> None:
     """Hook functions installed by _QtExceptionCaptureManager"""
@@ -47,7 +49,7 @@ class _QtExceptionCaptureManager:
     """
 
     def __init__(self) -> None:
-        self.old_hook: Optional[ExceptHook] = None
+        self.old_hook: ExceptHook | None = None
         self.exceptions: CapturedExceptions = []
 
     def start(self) -> None:
diff --git a/src/pytestqt/logging.py b/src/pytestqt/logging.py
index 5ae4e0d..10a701b 100644
--- a/src/pytestqt/logging.py
+++ b/src/pytestqt/logging.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from collections import namedtuple
 from contextlib import contextmanager
 import datetime
diff --git a/src/pytestqt/modeltest.py b/src/pytestqt/modeltest.py
index 6e364b4..e60609d 100644
--- a/src/pytestqt/modeltest.py
+++ b/src/pytestqt/modeltest.py
@@ -41,6 +41,8 @@
 #
 # $QT_END_LICENSE$
 
+from __future__ import annotations
+
 import enum
 import collections
 
diff --git a/src/pytestqt/plugin.py b/src/pytestqt/plugin.py
index 7264616..207351f 100644
--- a/src/pytestqt/plugin.py
+++ b/src/pytestqt/plugin.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import warnings
 
 import pytest
diff --git a/src/pytestqt/qt_compat.py b/src/pytestqt/qt_compat.py
index d25e0a4..4f3e6bf 100644
--- a/src/pytestqt/qt_compat.py
+++ b/src/pytestqt/qt_compat.py
@@ -8,6 +8,8 @@
 Based on from https://github.com/epage/PythonUtils.
 """
 
+from __future__ import annotations
+
 from collections import namedtuple, OrderedDict
 import os
 import sys
diff --git a/src/pytestqt/qtbot.py b/src/pytestqt/qtbot.py
index fa24d3e..c62b73c 100644
--- a/src/pytestqt/qtbot.py
+++ b/src/pytestqt/qtbot.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from collections.abc import Callable
 import contextlib
 from types import TracebackType
@@ -6,7 +8,6 @@
 from typing import (
     TYPE_CHECKING,
     Literal,
-    Optional,
     Any,
     cast,
 )
@@ -190,7 +191,7 @@ def __init__(self, request: FixtureRequest) -> None:
         self.wait_until = self.waitUntil
         self.wait_callback = self.waitCallback
 
-    def _should_raise(self, raising_arg: Optional[bool]) -> bool:
+    def _should_raise(self, raising_arg: bool | None) -> bool:
         ini_val = self._request.config.getini("qt_default_raising")
 
         if raising_arg is not None:
@@ -201,7 +202,7 @@ def _should_raise(self, raising_arg: Optional[bool]) -> bool:
             return True
 
     def addWidget(
-        self, widget: QWidget, *, before_close_func: Optional[BeforeCloseFunc] = None
+        self, widget: QWidget, *, before_close_func: BeforeCloseFunc | None = None
     ) -> None:
         """
         Adds a widget to be tracked by this bot. This is not required, but will ensure that the
@@ -222,7 +223,7 @@ def addWidget(
 
     def waitActive(
         self, widget: QWidget, *, timeout: int = 5000
-    ) -> "_WaitWidgetContextManager":
+    ) -> _WaitWidgetContextManager:
         """
         Context manager that waits for ``timeout`` milliseconds or until the window is active.
         If window is not exposed within ``timeout`` milliseconds, raise
@@ -251,7 +252,7 @@ def waitActive(
 
     def waitExposed(
         self, widget: QWidget, *, timeout: int = 5000
-    ) -> "_WaitWidgetContextManager":
+    ) -> _WaitWidgetContextManager:
         """
         Context manager that waits for ``timeout`` milliseconds or until the window is exposed.
         If the window is not exposed within ``timeout`` milliseconds, raise
@@ -336,9 +337,9 @@ def waitSignal(
         signal: SignalInstance,
         *,
         timeout: int = 5000,
-        raising: Optional[bool] = None,
-        check_params_cb: Optional[CheckParamsCb] = None,
-    ) -> "SignalBlocker":
+        raising: bool | None = None,
+        check_params_cb: CheckParamsCb | None = None,
+    ) -> SignalBlocker:
         """
         .. versionadded:: 1.2
 
@@ -404,10 +405,10 @@ def waitSignals(
         signals: list[SignalInstance],
         *,
         timeout: int = 5000,
-        raising: Optional[bool] = None,
-        check_params_cbs: Optional[list[CheckParamsCb]] = None,
+        raising: bool | None = None,
+        check_params_cbs: list[CheckParamsCb] | None = None,
         order: WaitSignalsOrder = "none",
-    ) -> "MultiSignalBlocker":
+    ) -> MultiSignalBlocker:
         """
         .. versionadded:: 1.4
 
@@ -526,7 +527,7 @@ def assertNotEmitted(
         spy.assert_not_emitted()
 
     def waitUntil(
-        self, callback: Callable[[], Optional[bool]], *, timeout: int = 5000
+        self, callback: Callable[[], bool | None], *, timeout: int = 5000
     ) -> None:
         """
         .. versionadded:: 2.0
@@ -599,8 +600,8 @@ def timed_out():
             self.wait(10)
 
     def waitCallback(
-        self, *, timeout: int = 5000, raising: Optional[bool] = None
-    ) -> "CallbackBlocker":
+        self, *, timeout: int = 5000, raising: bool | None = None
+    ) -> CallbackBlocker:
         """
         .. versionadded:: 3.1
 
@@ -642,7 +643,7 @@ def waitCallback(
         return blocker
 
     @contextlib.contextmanager
-    def captureExceptions(self) -> Iterator["CapturedExceptions"]:
+    def captureExceptions(self) -> Iterator[CapturedExceptions]:
         """
         .. versionadded:: 2.1
 
@@ -667,7 +668,7 @@ def captureExceptions(self) -> Iterator["CapturedExceptions"]:
             yield exceptions
 
     def screenshot(
-        self, widget: QWidget, suffix: str = "", region: Optional[QRect] = None
+        self, widget: QWidget, suffix: str = "", region: QRect | None = None
     ) -> Path:
         """
         .. versionadded:: 4.1
@@ -783,7 +784,7 @@ def _add_widget(
     item: pytest.Item,
     widget: QWidget,
     *,
-    before_close_func: Optional[BeforeCloseFunc] = None,
+    before_close_func: BeforeCloseFunc | None = None,
 ) -> None:
     """
     Register a widget into the given pytest item for later closing.
@@ -849,9 +850,9 @@ def __enter__(self) -> Self:
 
     def __exit__(
         self,
-        exc_type: Optional[type[BaseException]],
-        exc_val: Optional[BaseException],
-        exc_tb: Optional[TracebackType],
+        exc_type: type[BaseException] | None,
+        exc_val: BaseException | None,
+        exc_tb: TracebackType | None,
     ) -> None:
         __tracebackhide__ = True
         try:
diff --git a/src/pytestqt/utils.py b/src/pytestqt/utils.py
index b9e0a37..d479e63 100644
--- a/src/pytestqt/utils.py
+++ b/src/pytestqt/utils.py
@@ -1,9 +1,10 @@
-from typing import Optional
+from __future__ import annotations
+
 
 import pytest
 
 
-def get_marker(item: pytest.Item, name: str) -> Optional["pytest.Mark"]:
+def get_marker(item: pytest.Item, name: str) -> pytest.Mark | None:
     """Get a marker from a pytest item.
 
     This is here in order to stay compatible with pytest < 3.6 and not produce
diff --git a/src/pytestqt/wait_signal.py b/src/pytestqt/wait_signal.py
index 8361d44..11a0edd 100644
--- a/src/pytestqt/wait_signal.py
+++ b/src/pytestqt/wait_signal.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from collections.abc import Callable
 import functools
 import dataclasses
diff --git a/tests/conftest.py b/tests/conftest.py
index e09ea8b..52978e7 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import time
 
 import pytest
diff --git a/tests/test_basics.py b/tests/test_basics.py
index 5f9fa01..7868171 100644
--- a/tests/test_basics.py
+++ b/tests/test_basics.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import weakref
 
 import pytest
diff --git a/tests/test_exceptions.py b/tests/test_exceptions.py
index 9262804..ca28f0b 100644
--- a/tests/test_exceptions.py
+++ b/tests/test_exceptions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import sys
 
 import pytest
diff --git a/tests/test_logging.py b/tests/test_logging.py
index 4a772ce..b76e2e0 100644
--- a/tests/test_logging.py
+++ b/tests/test_logging.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import datetime
 
 import pytest
diff --git a/tests/test_modeltest.py b/tests/test_modeltest.py
index 4c9084b..cf73fbe 100644
--- a/tests/test_modeltest.py
+++ b/tests/test_modeltest.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 
 from pytestqt.qt_compat import qt_api
diff --git a/tests/test_qtbot_pep8_aliases.py b/tests/test_qtbot_pep8_aliases.py
index e208a9d..8dc0cd9 100644
--- a/tests/test_qtbot_pep8_aliases.py
+++ b/tests/test_qtbot_pep8_aliases.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import inspect
 from collections.abc import Iterator
 from unittest.mock import MagicMock
diff --git a/tests/test_qtest_proxies.py b/tests/test_qtest_proxies.py
index bae015c..486d85b 100644
--- a/tests/test_qtest_proxies.py
+++ b/tests/test_qtest_proxies.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 
 from pytestqt.qt_compat import qt_api
diff --git a/tests/test_screenshot.py b/tests/test_screenshot.py
index 4032873..11439c1 100644
--- a/tests/test_screenshot.py
+++ b/tests/test_screenshot.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pathlib
 
 import pytest
diff --git a/tests/test_wait_signal.py b/tests/test_wait_signal.py
index f498a76..453f95a 100644
--- a/tests/test_wait_signal.py
+++ b/tests/test_wait_signal.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import functools
 import fnmatch
 
diff --git a/tests/test_wait_until.py b/tests/test_wait_until.py
index 9884ffa..5816fcf 100644
--- a/tests/test_wait_until.py
+++ b/tests/test_wait_until.py
@@ -1,5 +1,6 @@
+from __future__ import annotations
+
 from collections.abc import Callable, Iterator
-from typing import Optional
 
 import pytest
 
@@ -30,7 +31,7 @@ def ticks(self) -> int:
 
 def test_wait_until(
     qtbot: QtBot,
-    wait_4_ticks_callback: Callable[[], Optional[bool]],
+    wait_4_ticks_callback: Callable[[], bool | None],
     tick_counter: Counter,
 ) -> None:
     tick_counter.start(100)
@@ -40,7 +41,7 @@ def test_wait_until(
 
 def test_wait_until_timeout(
     qtbot: QtBot,
-    wait_4_ticks_callback: Callable[[], Optional[bool]],
+    wait_4_ticks_callback: Callable[[], bool | None],
     tick_counter: Counter,
 ) -> None:
     tick_counter.start(200)
@@ -61,7 +62,7 @@ def test_pep8_alias(qtbot: QtBot) -> None:
 @pytest.fixture(params=["predicate", "assert"])
 def wait_4_ticks_callback(
     request: pytest.FixtureRequest, tick_counter: Counter
-) -> Callable[[], Optional[bool]]:
+) -> Callable[[], bool | None]:
     """Parametrized fixture which returns the two possible callback methods that can be
     passed to ``waitUntil``: predicate and assertion.
     """