diff --git a/nancy/__init__.py b/nancy/__init__.py
index a44318a..23e7c31 100644
--- a/nancy/__init__.py
+++ b/nancy/__init__.py
@@ -302,7 +302,7 @@ def main(argv: list[str] = sys.argv[1:]) -> None:
             inputs[0] = os.getcwd()
 
         expand(inputs, args.output, args.path)
-    except Exception as err:  # pylint: disable=broad-exception-caught
+    except Exception as err:
         if "DEBUG" in os.environ:
             logging.error(err, exc_info=True)
         else:
diff --git a/nancy/__main__.py b/nancy/__main__.py
index 2cf508e..a9ab5b8 100644
--- a/nancy/__main__.py
+++ b/nancy/__main__.py
@@ -3,5 +3,6 @@
 
 from . import main
 
+
 sys.argv[0] = re.sub(r"__main__.py$", "nancy", sys.argv[0])
 main()
diff --git a/nancy/warnings_util.py b/nancy/warnings_util.py
index b6dc50f..53a3bfd 100644
--- a/nancy/warnings_util.py
+++ b/nancy/warnings_util.py
@@ -1,23 +1,23 @@
-"""
-Warning and error routines.
+"""Warning and error routines.
+
 Copyright (c) Reuben Thomas 2023.
 Released under the GPL version 3, or (at your option) any later version.
 """
 
 import sys
+from typing import Callable, NoReturn, Optional, TextIO, Union
 from warnings import warn
-from typing import Callable, Optional, Union, Type, NoReturn, TextIO
 
 
 # Error messages
 def simple_warning(prog: str) -> Callable[..., None]:
-    def _warning(  # pylint: disable=too-many-arguments
+    def _warning(
         message: Union[Warning, str],
-        category: Type[Warning],  # pylint: disable=unused-argument
-        filename: str,  # pylint: disable=unused-argument
-        lineno: int,  # pylint: disable=unused-argument
+        category: type[Warning],
+        filename: str,
+        lineno: int,
         file: Optional[TextIO] = sys.stderr,
-        line: Optional[str] = None,  # pylint: disable=unused-argument
+        line: Optional[str] = None,
     ) -> None:
         print(f"{prog}: {message}", file=file or sys.stderr)
 
diff --git a/pyproject.toml b/pyproject.toml
index 5c3dd97..fa614d3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,36 +28,15 @@ requires = [
 [tool.setuptools]
 packages = ["nancy"]
 
-[tool.mypy]
-exclude = ['^dist', '^build']
-strict = true
-
-[tool.pylint.main]
-# Use multiple processes to speed up Pylint: 0 = auto-detect.
-jobs = 0
-
-[tool.pylint.MASTER]
-init-hook = 'import sys; sys.path.append(".")'
-
-[tool.pylint.format]
-const-naming-style = "any"
-disable = [
-    "missing-module-docstring",
-    "missing-class-docstring",
-    "missing-function-docstring",
-    "no-member",
-    "fixme",
-    "global-statement",
-    "redefined-outer-name",
-    "too-many-locals",
-    "too-many-branches",
-    "too-many-function-args",
-    "too-many-positional-arguments",
-    "too-many-statements",
-]
-enable = [
-    "useless-suppression",
-]
-
 [tool.pytest.ini_options]
 addopts = "-p no:warnings"
+
+[tool.ruff.lint]
+select = ["D", "E", "F", "I", "UP"]
+ignore = ["D1", "D401", "D415", "E501"]
+
+[tool.ruff.lint.isort]
+lines-after-imports = 2
+
+[tool.ruff.lint.pydocstyle]
+convention = "google"
diff --git a/tests/test_nancy.py b/tests/test_nancy.py
index 59dbe5e..a89ef1a 100644
--- a/tests/test_nancy.py
+++ b/tests/test_nancy.py
@@ -1,32 +1,33 @@
-"""
-Nancy tests.
+"""Nancy tests.
+
 Copyright (c) Reuben Thomas 2024.
 Released under the GPL version 3, or (at your option) any later version.
 """
 
 import os
-import sys
 import socket
-from pathlib import Path
+import sys
 from collections.abc import Iterator
+from pathlib import Path
 from tempfile import TemporaryDirectory
 from unittest import mock
 
 import pytest
 from pytest import CaptureFixture, LogCaptureFixture
-
 from testutils import (
-    passing_test,
+    check_links,
+    failing_cli_test,
     failing_test,
     passing_cli_test,
-    failing_cli_test,
-    check_links,
+    passing_test,
 )
+
 from nancy import main
 
-if sys.version_info[:2] >= (3, 11): # pragma: no cover
-    from contextlib import chdir
-else: # pragma: no cover
+
+if sys.version_info[:2] >= (3, 11):  # pragma: no cover
+    from contextlib import chdir  # pyright: ignore
+else:  # pragma: no cover
     from contextlib import contextmanager
 
     @contextmanager
@@ -190,12 +191,11 @@ def test_trying_to_output_multiple_files_to_stdout_causes_an_error() -> None:
 def test_help_option_should_produce_output(capsys: CaptureFixture[str]) -> None:
     with pytest.raises(SystemExit) as e:
         main(["--help"])
-    assert e.type == SystemExit
+    assert e.type is SystemExit
     assert e.value.code == 0
     assert capsys.readouterr().out.find("A simple templating system.") != -1
 
 
-# pylint: disable-next=invalid-name
 def test_running_with_a_single_file_as_INPUT_PATH_should_work(
     capsys: CaptureFixture[str],
 ) -> None:
@@ -241,7 +241,6 @@ def test_invalid_command_line_argument_causes_an_error(
     failing_cli_test(capsys, caplog, ["--foo", "a"], "unrecognized arguments: --foo")
 
 
-# pylint: disable-next=invalid-name
 def test_running_on_a_nonexistent_path_causes_an_error_DEBUG_coverage(
     capsys: CaptureFixture[str],
     caplog: LogCaptureFixture,
@@ -292,7 +291,6 @@ def test_absolute_build_path_causes_an_error(
         )
 
 
-# pylint: disable-next=invalid-name
 def test_empty_INPUT_PATH_causes_an_error(
     capsys: CaptureFixture[str],
     caplog: LogCaptureFixture,
diff --git a/tests/testutils.py b/tests/testutils.py
index 2e2788e..414d3a5 100644
--- a/tests/testutils.py
+++ b/tests/testutils.py
@@ -1,21 +1,22 @@
-"""
-Nancy tests utility routines.
+"""Nancy tests utility routines.
+
 Copyright (c) Reuben Thomas 2023-2024.
 Released under the GPL version 3, or (at your option) any later version.
 """
 
 import contextlib
+import difflib
+import filecmp
 import io
 import os
-import sys
-import subprocess
 import re
-import filecmp
-import difflib
+import subprocess
+import sys
 import tempfile
-from tempfile import TemporaryDirectory
+from contextlib import AbstractContextManager
 from dataclasses import dataclass
-from typing import AnyStr, Callable, List, Optional, Union, ContextManager
+from tempfile import TemporaryDirectory
+from typing import Callable, Optional, Union
 
 import pytest
 from pytest import CaptureFixture, LogCaptureFixture
@@ -26,7 +27,7 @@
 @dataclass
 class Case:
     name: str
-    args: List[str]
+    args: list[str]
     expected: str
     path: Optional[str] = None
     error: Optional[int] = None
@@ -34,7 +35,7 @@ class Case:
 
 
 def file_objects_equal(
-    a: Union[AnyStr, os.PathLike[AnyStr]], b: Union[os.PathLike[AnyStr], AnyStr]
+    a: Union[os.PathLike[str], str], b: Union[os.PathLike[str], str]
 ) -> bool:
     if os.path.isfile(a):
         with contextlib.ExitStack() as stack:
@@ -61,12 +62,12 @@ def file_objects_equal(
 
 
 def passing_test(
-    input_dirs: List[str],
+    input_dirs: list[str],
     expected: str,
     build_path: Optional[str] = None,
     output_dir: Optional[str] = None,
 ) -> None:
-    ctx_mgr: Union[ContextManager[None], TemporaryDirectory[str]]
+    ctx_mgr: Union[AbstractContextManager[None], TemporaryDirectory[str]]
     if output_dir is None:
         ctx_mgr = tempfile.TemporaryDirectory()
         output_obj = os.path.join(ctx_mgr.name, "output")
@@ -82,7 +83,7 @@ def passing_test(
 
 
 def failing_test(
-    input_dirs: List[str],
+    input_dirs: list[str],
     expected: str,
     build_path: Optional[str] = None,
     output_dir: Optional[str] = None,
@@ -90,7 +91,7 @@ def failing_test(
     with TemporaryDirectory() as expected_dir:
         try:
             passing_test(input_dirs, expected_dir, build_path, output_dir)
-        except Exception as err:  # pylint: disable=broad-exception-caught
+        except Exception as err:
             assert str(err).find(expected) != -1
             return
         raise ValueError("test passed unexpectedly")  # pragma: no cover
@@ -98,13 +99,13 @@ def failing_test(
 
 def passing_cli_test(
     capsys: CaptureFixture[str],
-    args: List[str],
+    args: list[str],
     expected: str,
     output_dir: Optional[str] = None,
 ) -> None:
     tmp_dir = None
     if output_dir is None:
-        tmp_dir = TemporaryDirectory()  # pylint: disable=consider-using-with
+        tmp_dir = TemporaryDirectory()
         output_obj = os.path.join(tmp_dir.name, "output")
     else:
         output_obj = output_dir
@@ -124,13 +125,13 @@ def passing_cli_test(
 def failing_cli_test(
     capsys: CaptureFixture[str],
     caplog: LogCaptureFixture,
-    args: List[str],
+    args: list[str],
     expected: str,
     output_dir: Optional[str] = None,
 ) -> None:
     with pytest.raises(SystemExit) as e:
         passing_cli_test(capsys, args, "", output_dir)
-    assert e.type == SystemExit
+    assert e.type is SystemExit
     assert e.value.code != 0
     err = capsys.readouterr().err
     log = caplog.messages
diff --git a/tox.ini b/tox.ini
index a44b9fe..11d9b38 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,12 +9,12 @@ xfail_strict = True
 deps =
     coverage
     LinkChecker
-    mypy
-    pylint
+    pyright
+    ruff
     types-setuptools
 commands =
-    mypy .
-    pylint nancy
+    pyright nancy
+    ruff check nancy
     coverage run -m pytest {posargs}
     coverage report --show-missing --skip-covered --fail-under=100
 extras = test