diff --git a/misc/synology.py b/misc/synology.py
index d9547559..fe45b797 100644
--- a/misc/synology.py
+++ b/misc/synology.py
@@ -2,6 +2,8 @@
 # SPDX-FileCopyrightText: 2017 Enantiomerie
 # SPDX-License-Identifier: MIT
 
+"""Example OCRmyPDF for Synology NAS"""
+
 from __future__ import annotations
 
 # This script must be edited to meet your needs.
@@ -25,10 +27,7 @@ logging.basicConfig(
     filemode='w',
 )
 
-if len(sys.argv) > 1:
-    start_dir = sys.argv[1]
-else:
-    start_dir = '.'
+start_dir = sys.argv[1] if len(sys.argv) > 1 else '.'
 
 for dir_name, _subdirs, file_list in os.walk(start_dir):
     logging.info(dir_name)
diff --git a/src/ocrmypdf/builtin_plugins/concurrency.py b/src/ocrmypdf/builtin_plugins/concurrency.py
index dabdd6dc..3c53b3e7 100644
--- a/src/ocrmypdf/builtin_plugins/concurrency.py
+++ b/src/ocrmypdf/builtin_plugins/concurrency.py
@@ -1,9 +1,9 @@
 # SPDX-FileCopyrightText: 2022 James R. Barlow
 # SPDX-License-Identifier: MPL-2.0
-from __future__ import annotations
-
 """OCRmyPDF's multiprocessing/multithreading abstraction layer."""
 
+from __future__ import annotations
+
 import logging
 import logging.handlers
 import multiprocessing
diff --git a/src/ocrmypdf/pdfinfo/info.py b/src/ocrmypdf/pdfinfo/info.py
index 1430af12..305b2e80 100644
--- a/src/ocrmypdf/pdfinfo/info.py
+++ b/src/ocrmypdf/pdfinfo/info.py
@@ -17,16 +17,7 @@ from functools import partial
 from math import hypot, inf, isclose
 from os import PathLike
 from pathlib import Path
-from typing import (
-    Container,
-    Iterable,
-    Iterator,
-    Mapping,
-    NamedTuple,
-    Optional,
-    Sequence,
-    Tuple,
-)
+from typing import Container, Iterable, Iterator, Mapping, NamedTuple, Sequence, Tuple
 from warnings import warn
 
 from pikepdf import (
diff --git a/src/ocrmypdf/pdfinfo/layout.py b/src/ocrmypdf/pdfinfo/layout.py
index c5785522..d586fbfe 100644
--- a/src/ocrmypdf/pdfinfo/layout.py
+++ b/src/ocrmypdf/pdfinfo/layout.py
@@ -1,5 +1,7 @@
 # SPDX-FileCopyrightText: 2022 James R. Barlow
 # SPDX-License-Identifier: MPL-2.0
+"""Detailed text position and layout analysis, building on pdfminer.six."""
+
 from __future__ import annotations
 
 import re
@@ -23,14 +25,14 @@ from ocrmypdf.exceptions import EncryptedPdfError, InputFileError
 STRIP_NAME = re.compile(r'[0-9]+')
 
 
-original_PDFSimpleFont_init = PDFSimpleFont.__init__
+original_pdfsimplefont_init = PDFSimpleFont.__init__
 
 
-def PDFSimpleFont__init__(self, descriptor, widths, spec):
+def pdfsimplefont__init__(self, descriptor, widths, spec):
     # Font encoding is specified either by a name of
     # built-in encoding or a dictionary that describes
     # the differences.
-    original_PDFSimpleFont_init(self, descriptor, widths, spec)
+    original_pdfsimplefont_init(self, descriptor, widths, spec)
     # pdfminer is incorrect. If there is no ToUnicode and no Encoding, do not
     # assume Unicode conversion is possible. RM 9.10.2
     if not self.unicode_map and 'Encoding' not in spec:
@@ -38,25 +40,25 @@ def PDFSimpleFont__init__(self, descriptor, widths, spec):
     return
 
 
-PDFSimpleFont.__init__ = PDFSimpleFont__init__
+PDFSimpleFont.__init__ = pdfsimplefont__init__
 
 #
 # pdfminer patches when creator is PScript5.dll
 #
 
 
-def PDFType3Font__PScript5_get_height(self):
+def pdftype3font__pscript5_get_height(self):
     h = self.bbox[3] - self.bbox[1]
     if h == 0:
         h = self.ascent - self.descent
     return h * copysign(1.0, self.vscale)
 
 
-def PDFType3Font__PScript5_get_descent(self):
+def pdftype3font__pscript5_get_descent(self):
     return self.descent * copysign(1.0, self.vscale)
 
 
-def PDFType3Font__PScript5_get_ascent(self):
+def pdftype3font__pscript5_get_ascent(self):
     return self.ascent * copysign(1.0, self.vscale)
 
 
@@ -132,14 +134,14 @@ class LTStateAwareChar(LTChar):
         return self._text
 
     def __repr__(self):
-        return '<{} {} matrix={} rendermode={!r} font={!r} adv={} text={!r}>'.format(
-            self.__class__.__name__,
-            bbox2str(self.bbox),
-            matrix2str(self.matrix),
-            self.rendermode,
-            self.fontname,
-            self.adv,
-            self.get_text(),
+        return (
+            f"<{self.__class__.__name__} "
+            f"{bbox2str(self.bbox)} "
+            f"matrix={matrix2str(self.matrix)} "
+            f"rendermode={self.rendermode!r} "
+            f"font={self.fontname!r} "
+            f"adv={self.adv} "
+            f"text={self.get_text()!r}>"
         )
 
 
@@ -221,9 +223,9 @@ def get_page_analysis(infile, pageno, pscript5_mode):
         patcher = patch.multiple(
             'pdfminer.pdffont.PDFType3Font',
             spec=True,
-            get_ascent=PDFType3Font__PScript5_get_ascent,
-            get_descent=PDFType3Font__PScript5_get_descent,
-            get_height=PDFType3Font__PScript5_get_height,
+            get_ascent=pdftype3font__pscript5_get_ascent,
+            get_descent=pdftype3font__pscript5_get_descent,
+            get_height=pdftype3font__pscript5_get_height,
         )
         patcher.start()
 
diff --git a/tests/test_optimize.py b/tests/test_optimize.py
index 5717269e..b2ad9bfe 100644
--- a/tests/test_optimize.py
+++ b/tests/test_optimize.py
@@ -27,6 +27,9 @@ needs_jbig2enc = pytest.mark.skipif(
 )
 
 
+# pylint:disable=redefined-outer-name
+
+
 @pytest.fixture(scope="session")
 def palette(resources):
     return resources / 'palette.pdf'