diff --git a/noxfile.py b/noxfile.py
index df59202..2a2a9ce 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -23,7 +23,6 @@ def test(session: Session):
     """Run all tests."""
     session.install('-U', 'pip')
     session.install('-U', '.[test,toml]', 'coverage')
-    session.run('pip', 'list')
     session.run('coverage', 'run', '-p', '-m', 'ward', *session.posargs)
 
 
@@ -32,7 +31,6 @@ def test_without_toml(session: Session):
     """Run tests without optional TOML support installed."""
     session.install('-U', 'pip')
     session.install('-U', '.[test-without-toml]', 'coverage')
-    session.run('pip', 'list')
     session.run('coverage', 'run', '-p', '-m', 'ward', *session.posargs)
 
 
diff --git a/nt2/casters.py b/nt2/casters.py
index 2089774..a53cd01 100644
--- a/nt2/casters.py
+++ b/nt2/casters.py
@@ -67,14 +67,14 @@ def _str_to_num(informal_num: str) -> int | float:
         num = float(informal_num)
     except ValueError as e:
         for prefix, base in {'0x': 16, '0o': 8, '0b': 2}.items():
-            if re.match(f"[+-]?{prefix}", informal_num, re.I):
+            if re.match(f"[+-]?{prefix}", informal_num, re.IGNORECASE):
                 try:
                     num = int(informal_num, base)
                 except Exception:  # pragma: no cover
                     raise ValueError(': '.join(e.args)) from None
                 else:
                     return num
-        raise e  # pragma: no cover
+        raise  # pragma: no cover
     try:
         inum = int(num)
     except (ValueError, OverflowError):
diff --git a/nt2/dumpers.py b/nt2/dumpers.py
index 06095e6..060fe40 100644
--- a/nt2/dumpers.py
+++ b/nt2/dumpers.py
@@ -6,12 +6,16 @@
 import sys
 from json import dump as _jdump, dumps as _jdumps, loads as _jloads
 from json.decoder import JSONDecodeError
-from pathlib import Path
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+    from plumbum import LocalPath
 from textwrap import indent
-from typing import Sequence, TextIO, cast
+from typing import BinaryIO, Sequence, TextIO, cast
 
 from nestedtext import dump as _ntdump, dumps as _ntdumps, load as _ntload
-from plumbum import LocalPath
 from rich.console import Console as RichConsole
 from rich.syntax import Syntax as RichSyntax
 from ruamel.yaml.scalarstring import walk_tree as use_multiline_syntax
@@ -110,8 +114,8 @@ def ydump(data: dict | list):
         out_stream = io.StringIO()
         try:
             YAML_EDITOR.dump(data, out_stream)
-        except Exception as e:
-            raise e
+        except Exception:
+            raise
         else:
             _syntax_print(out_stream.getvalue(), 'yaml')
         finally:
@@ -140,9 +144,9 @@ def tdump(data: dict):
     """
     _require_toml_support()
     if sys.stdout.isatty():
-        _syntax_print(_tdumps(data, multiline_strings=True), 'toml')  # type: ignore
+        _syntax_print(_tdumps(data, multiline_strings=True), 'toml')  # pyright: ignore [reportPossiblyUnboundVariable]
     else:
-        print(_tdumps(data, multiline_strings=True), end='')  # type: ignore
+        print(_tdumps(data, multiline_strings=True), end='')  # pyright: ignore [reportPossiblyUnboundVariable]
 
 
 def jloads(content: str) -> dict | list:
@@ -238,7 +242,7 @@ def dump_yaml_to_schema(*input_files: LocalPath):
         _dump_typed_data_to_schema(typed_data)
     else:
         for f in input_files:
-            with open(f, encoding='utf-8') as ifile:
+            with f.open(encoding='utf-8') as ifile:
                 typed_data = yload(ifile)
             _dump_typed_data_to_schema(typed_data)
 
@@ -252,12 +256,12 @@ def dump_toml_to_schema(*input_files: LocalPath):
     """
     _require_toml_support()
     if not input_files:
-        typed_data = tloads(sys.stdin.read())  # type: ignore
+        typed_data = tloads(sys.stdin.read())  # pyright: ignore [reportPossiblyUnboundVariable]
         _dump_typed_data_to_schema(typed_data)
     else:
         for f in input_files:
-            with open(f, 'rb') as ifile:
-                typed_data = tload(ifile)  # type: ignore
+            with f.open('rb') as ifile:
+                typed_data = tload(cast(BinaryIO, ifile))  # pyright: ignore [reportPossiblyUnboundVariable]
             _dump_typed_data_to_schema(typed_data)
 
 
@@ -275,7 +279,7 @@ def dump_yaml_to_nestedtext(*input_files: LocalPath):
         ntdump(data)
     else:
         for f in input_files:
-            with open(f, encoding='utf-8') as ifile:
+            with f.open(encoding='utf-8') as ifile:
                 data = yload(ifile)
             data = converter.unstructure(data)
             ntdump(data)
@@ -291,13 +295,13 @@ def dump_toml_to_nestedtext(*input_files: LocalPath):
     _require_toml_support()
     converter = mk_stringy_converter()
     if not input_files:
-        data = tloads(sys.stdin.read())  # type: ignore
+        data = tloads(sys.stdin.read())  # pyright: ignore [reportPossiblyUnboundVariable]
         data = converter.unstructure(data)
         ntdump(data)
     else:
         for f in input_files:
-            with open(f, 'rb') as ifile:
-                data = tload(ifile)  # type: ignore
+            with f.open('rb') as ifile:
+                data = tload(cast(BinaryIO, ifile))  # pyright: ignore [reportPossiblyUnboundVariable]
             data = converter.unstructure(data)
             ntdump(data)
 
diff --git a/nt2/ui.py b/nt2/ui.py
old mode 100755
new mode 100644
index 287ecf4..672da1e
--- a/nt2/ui.py
+++ b/nt2/ui.py
@@ -6,11 +6,16 @@
 
 import sys
 from json import JSONDecodeError
-from typing import cast
+from typing import ClassVar, cast
 
 from nestedtext import NestedTextError, load as ntload
 from plumbum.cli import Application, ExistingFile, Flag, SwitchAttr
-from plumbum.colors import blue, green, magenta, yellow  # type: ignore
+from plumbum.colors import (
+    blue,  # pyright: ignore [reportAttributeAccessIssue]
+    green,  # pyright: ignore [reportAttributeAccessIssue]
+    magenta,  # pyright: ignore [reportAttributeAccessIssue]
+    yellow,  # pyright: ignore [reportAttributeAccessIssue]
+)
 from rich import inspect as _rich_inspect
 from rich.console import Console as RichConsole
 from ruamel.yaml.parser import ParserError as YAMLParserError
@@ -66,7 +71,7 @@ class _ColorApp(Application):
     PROGNAME = green
     VERSION = __version__ | blue
     COLOR_USAGE = green
-    COLOR_GROUPS = {'Meta-switches': magenta, 'Switches': yellow, 'Subcommands': blue}
+    COLOR_GROUPS: ClassVar = {'Meta-switches': magenta, 'Switches': yellow, 'Subcommands': blue}
     ALLOW_ABBREV = True
 
 
@@ -137,7 +142,7 @@ class NestedTextToJSON(_NestedTextToTypedFormat, _NestedTextToTypedFormatSupport
         nt2json --int People.age --boolean 'People."is a wizard"' example.nt
     """
 
-    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201,ANN101
+    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201
         try:
             for schema_file in cast(list, self.schema_files):
                 schema = cast(dict, ntload(schema_file))
@@ -176,7 +181,7 @@ class NestedTextToYAML(
         nt2yaml --int People.age --boolean 'People."is a wizard"' example.nt
     """
 
-    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201,ANN101
+    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201
         try:
             for schema_file in cast(list, self.schema_files):
                 schema = cast(dict, ntload(schema_file))
@@ -213,7 +218,7 @@ class NestedTextToTOML(_NestedTextToTypedFormat, _NestedTextToTypedFormatSupport
         nt2toml --int People.age --boolean 'People."is a wizard"' example.nt
     """
 
-    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201,ANN101
+    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201
         try:
             for schema_file in cast(list, self.schema_files):
                 schema = cast(dict, ntload(schema_file))
@@ -242,7 +247,7 @@ class JSONToNestedText(_TypedFormatToSchema):
         cat example.json | json2nt
     """
 
-    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201,ANN101
+    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201
         try:
             if not self.to_schema:
                 dump_json_to_nestedtext(*input_files)
@@ -263,7 +268,7 @@ class YAMLToNestedText(_TypedFormatToSchema):
         cat example.yml | yaml2nt
     """
 
-    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201,ANN101
+    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201
         try:
             if not self.to_schema:
                 dump_yaml_to_nestedtext(*input_files)
@@ -284,7 +289,7 @@ class TOMLToNestedText(_TypedFormatToSchema):
         cat example.yml | toml2nt
     """
 
-    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201,ANN101
+    def main(self, *input_files: ExistingFile):  # type: ignore  # noqa: D102,ANN201
         try:
             if not self.to_schema:
                 dump_toml_to_nestedtext(*input_files)
diff --git a/nt2/yamlpath_tools.py b/nt2/yamlpath_tools.py
index 40bfe6b..0bc8e3c 100644
--- a/nt2/yamlpath_tools.py
+++ b/nt2/yamlpath_tools.py
@@ -6,19 +6,20 @@
 from collections import defaultdict
 from datetime import date, datetime, time
 from types import SimpleNamespace
-from typing import Iterable
+from typing import TYPE_CHECKING, Iterable
 
 try:
     from types import NoneType
 except ImportError:
     NoneType = type(None)
 
-from ruamel.yaml.main import YAML
+if TYPE_CHECKING:
+    from ruamel.yaml.main import YAML
+    from yamlpath.wrappers.nodecoords import NodeCoords
 from yamlpath import Processor, YAMLPath
 from yamlpath.common import Parsers
 from yamlpath.exceptions import YAMLPathException
 from yamlpath.wrappers import ConsolePrinter
-from yamlpath.wrappers.nodecoords import NodeCoords
 
 
 def mk_yaml_editor() -> YAML:
@@ -73,7 +74,7 @@ def non_null_matches(surgeon: Processor, *query_paths: str) -> Iterable[NodeCoor
             yield from matches
 
 
-def _schema_entry_type(obj: int | float | bool | None | datetime | date | time) -> str:
+def _schema_entry_type(obj: float | bool | None | datetime | date | time) -> str:
     # -> Literal['number', 'boolean', 'null', 'date']
     if isinstance(obj, bool):
         return 'boolean'
diff --git a/pyproject.toml b/pyproject.toml
index 96b7251..823987c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,7 +53,8 @@ quote-style = "preserve"
 skip-magic-trailing-comma = true
 
 [tool.ruff.lint]
-select = ["F", "E", "W", "C90", "I", "N", "D", "UP", "YTT", "ANN", "S", "FBT", "B", "SIM"]
+select = ["ALL"]
+ignore = ["BLE", "COM812", "EM", "FIX", "ISC001", "PERF203", "PGH003", "Q000", "T20", "TD002", "TD003", "TRY003", "TRY302"]
 
 [tool.ruff.lint.flake8-annotations]
 suppress-none-returning = true
@@ -65,6 +66,9 @@ split-on-trailing-comma = false
 [tool.ruff.lint.pydocstyle]
 convention = "pep257"
 
+[tool.ruff.lint.pylint]
+max-args = 6
+
 [tool.taskipy.tasks]
 fmt = "nox -s fmt"
 lock = "nox -s lock"
diff --git a/test/commands.py b/test/commands.py
index a1331f4..4a58031 100644
--- a/test/commands.py
+++ b/test/commands.py
@@ -10,16 +10,19 @@
 Each version herein returns the stdout as a `str` for convenience in tests.
 """
 
+from __future__ import annotations
+
 import io
 import sys
-from typing import Sequence, Union, cast
+from typing import TYPE_CHECKING, Sequence, cast
 
 try:
     from typing import TypeAlias
 except ImportError:
     from typing import Any as TypeAlias
 
-from plumbum import LocalPath
+if TYPE_CHECKING:
+    from plumbum import LocalPath
 from plumbum.cli import Application as _Application
 
 from nt2.ui import (
@@ -43,7 +46,7 @@
 def _run_app(
     app_class: Application,
     *cli_args: LocalPath,
-    **cli_kwargs: Union[str, LocalPath, Sequence[str], bool],
+    **cli_kwargs: str | LocalPath | Sequence[str] | bool,
 ) -> str:
     """
     Invoke `app_class` with given flags, and return stdout content.
@@ -64,8 +67,8 @@ def _run_app(
     try:
         sys.stdout = fake_stdout
         app, main_result = app_class.invoke(*cli_args, **cli_kwargs)
-    except Exception as e:  # pragma: no cover
-        raise e
+    except Exception:  # pragma: no cover
+        raise
     else:
         output = fake_stdout.getvalue()
     finally:
@@ -74,7 +77,7 @@ def _run_app(
     return output
 
 
-def json2nt(*cli_args: LocalPath, **cli_kwargs: Union[str, bool]) -> str:
+def json2nt(*cli_args: LocalPath, **cli_kwargs: str | bool) -> str:
     """
     Invoke `JSONToNestedText` in a test-friendly way.
 
@@ -88,7 +91,7 @@ def json2nt(*cli_args: LocalPath, **cli_kwargs: Union[str, bool]) -> str:
     return _run_app(JSONToNestedText, *cli_args, **cli_kwargs)
 
 
-def nt2json(*cli_args: LocalPath, **cli_kwargs: Union[str, LocalPath, Sequence[str]]) -> str:
+def nt2json(*cli_args: LocalPath, **cli_kwargs: str | LocalPath | Sequence[str]) -> str:
     """
     Invoke `NestedTextToJSON` in a test-friendly way.
 
@@ -102,7 +105,7 @@ def nt2json(*cli_args: LocalPath, **cli_kwargs: Union[str, LocalPath, Sequence[s
     return _run_app(NestedTextToJSON, *cli_args, **cli_kwargs)
 
 
-def nt2yaml(*cli_args: LocalPath, **cli_kwargs: Union[str, LocalPath, Sequence[str]]) -> str:
+def nt2yaml(*cli_args: LocalPath, **cli_kwargs: str | LocalPath | Sequence[str]) -> str:
     """
     Invoke `NestedTextToYAML` in a test-friendly way.
 
@@ -116,7 +119,7 @@ def nt2yaml(*cli_args: LocalPath, **cli_kwargs: Union[str, LocalPath, Sequence[s
     return _run_app(NestedTextToYAML, *cli_args, **cli_kwargs)
 
 
-def yaml2nt(*cli_args: LocalPath, **cli_kwargs: Union[str, bool]) -> str:
+def yaml2nt(*cli_args: LocalPath, **cli_kwargs: str | bool) -> str:
     """
     Invoke `YAMLToNestedText` in a test-friendly way.
 
@@ -130,7 +133,7 @@ def yaml2nt(*cli_args: LocalPath, **cli_kwargs: Union[str, bool]) -> str:
     return _run_app(YAMLToNestedText, *cli_args, **cli_kwargs)
 
 
-def nt2toml(*cli_args: LocalPath, **cli_kwargs: Union[str, LocalPath, Sequence[str]]) -> str:
+def nt2toml(*cli_args: LocalPath, **cli_kwargs: str | LocalPath | Sequence[str]) -> str:
     """
     Invoke `NestedTextToTOML` in a test-friendly way.
 
@@ -144,7 +147,7 @@ def nt2toml(*cli_args: LocalPath, **cli_kwargs: Union[str, LocalPath, Sequence[s
     return _run_app(NestedTextToTOML, *cli_args, **cli_kwargs)
 
 
-def toml2nt(*cli_args: LocalPath, **cli_kwargs: Union[str, bool]) -> str:
+def toml2nt(*cli_args: LocalPath, **cli_kwargs: str | bool) -> str:
     """
     Invoke `TOMLToNestedText` in a test-friendly way.
 
diff --git a/test/test_toml.py b/test/test_toml.py
index 1f2ab29..36e090b 100644
--- a/test/test_toml.py
+++ b/test/test_toml.py
@@ -1,6 +1,8 @@
 """Test TOML <-> NestedText."""
 
-from typing import Dict, Sequence, cast
+from __future__ import annotations
+
+from typing import Sequence, cast
 
 from plumbum import LocalPath, local
 from ward import skip, test
@@ -114,7 +116,7 @@ def _(
     def _(
         input_file: LocalPath = input_file,
         expected_file: LocalPath = expected_file,
-        casting_args: Dict[str, Sequence[str]] = casting_args,
+        casting_args: dict[str, Sequence[str]] = casting_args,
     ):
         output = nt2toml(input_file, **casting_args)
         assert_file_content(expected_file, output)
diff --git a/test/utils.py b/test/utils.py
index 98c004f..d608041 100644
--- a/test/utils.py
+++ b/test/utils.py
@@ -2,11 +2,14 @@
 
 from __future__ import annotations
 
-from pathlib import Path
-from typing import Sequence, TextIO, cast
+from typing import TYPE_CHECKING, Sequence, TextIO, cast
+
+if TYPE_CHECKING:
+    from pathlib import Path
+
+    from plumbum import LocalPath
 
 from nestedtext import load as ntload
-from plumbum import LocalPath
 from ward.expect import assert_equal