diff --git a/src/ocrmypdf/__main__.py b/src/ocrmypdf/__main__.py
index b6dc0466..411948e2 100755
--- a/src/ocrmypdf/__main__.py
+++ b/src/ocrmypdf/__main__.py
@@ -56,7 +56,7 @@ def run(args=None):
     configure_logging(
         verbosity, progress_bar_friendly=options.progress_bar, manage_root_logger=True
     )
-    log.debug('ocrmypdf ' + __version__)
+    log.debug('ocrmypdf %s', __version__)
     try:
         check_options(options)
     except ValueError as e:
diff --git a/src/ocrmypdf/_jobcontext.py b/src/ocrmypdf/_jobcontext.py
index 938c908b..c5ffa5b1 100644
--- a/src/ocrmypdf/_jobcontext.py
+++ b/src/ocrmypdf/_jobcontext.py
@@ -15,7 +15,6 @@
 # You should have received a copy of the GNU General Public License
 # along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
 
-import logging
 import os
 import shutil
 import sys
diff --git a/src/ocrmypdf/_pipeline.py b/src/ocrmypdf/_pipeline.py
index cd82fea4..196a8d70 100644
--- a/src/ocrmypdf/_pipeline.py
+++ b/src/ocrmypdf/_pipeline.py
@@ -20,30 +20,29 @@ import os
 import re
 import sys
 from datetime import datetime, timezone
-from pathlib import Path
 from shutil import copyfileobj
 
 import img2pdf
 import pikepdf
 from pikepdf.models.metadata import encode_pdf_date
-from PIL import Image
+from PIL import Image, ImageColor, ImageDraw
 
-from . import leptonica
-from ._version import PROGRAM_NAME
-from ._version import __version__ as VERSION
-from .exceptions import (
+from ocrmypdf import leptonica
+from ocrmypdf._version import PROGRAM_NAME
+from ocrmypdf._version import __version__ as VERSION
+from ocrmypdf.exceptions import (
     DpiError,
     EncryptedPdfError,
     InputFileError,
     PriorOcrFoundError,
     UnsupportedImageFormatError,
 )
-from .exec import ghostscript, tesseract
-from .helpers import Resolution, safe_symlink
-from .hocrtransform import HocrTransform
-from .optimize import optimize
-from .pdfa import generate_pdfa_ps
-from .pdfinfo import Colorspace, Encoding, PdfInfo
+from ocrmypdf.exec import ghostscript, tesseract, unpaper
+from ocrmypdf.helpers import Resolution, safe_symlink
+from ocrmypdf.hocrtransform import HocrTransform
+from ocrmypdf.optimize import optimize
+from ocrmypdf.pdfa import generate_pdfa_ps
+from ocrmypdf.pdfinfo import Colorspace, Encoding, PdfInfo
 
 log = logging.getLogger(__name__)
 
@@ -63,8 +62,8 @@ def triage_image_file(input_file, output_file, options):
         log.info("Input file is an image")
         if 'dpi' in im.info:
             if im.info['dpi'] <= (96, 96) and not options.image_dpi:
-                log.info("Image size: (%d, %d)" % im.size)
-                log.info("Image resolution: (%d, %d)" % im.info['dpi'])
+                log.info("Image size: (%d, %d)", *im.size)
+                log.info("Image resolution: (%d, %d)", *im.info['dpi'])
                 log.error(
                     "Input file is an image, but the resolution (DPI) is "
                     "not credible.  Estimate the resolution at which the "
@@ -72,7 +71,7 @@ def triage_image_file(input_file, output_file, options):
                 )
                 raise DpiError()
         elif not options.image_dpi:
-            log.info("Image size: (%d, %d)" % im.size)
+            log.info("Image size: (%d, %d)", *im.size)
             log.error(
                 "Input file is an image, but has no resolution (DPI) "
                 "in its metadata.  Estimate the resolution at which "
@@ -261,7 +260,7 @@ def is_ocr_required(page_context):
             ocr_required = True
         elif options.redo_ocr:
             if pageinfo.has_corrupt_text:
-                log.warn(
+                log.warning(
                     "some text on this page cannot be mapped to characters: "
                     "consider using --force-ocr instead"
                 )
@@ -288,7 +287,7 @@ def is_ocr_required(page_context):
             )
         elif options.force_ocr:
             # Warn the user they might not want to do this
-            log.warn(
+            log.warning(
                 "page has no images - "
                 "all vector content will be "
                 f"rasterized at {VECTOR_PAGE_DPI} DPI, losing some resolution and likely "
@@ -308,7 +307,7 @@ def is_ocr_required(page_context):
         pixel_count = pageinfo.width_pixels * pageinfo.height_pixels
         if pixel_count > (options.skip_big * 1_000_000):
             ocr_required = False
-            log.warn(
+            log.warning(
                 "page too big, skipping OCR "
                 f"({(pixel_count / 1_000_000):.1f} MPixels > {options.skip_big:.1f} MPixels --skip-big)"
             )
@@ -464,8 +463,6 @@ def preprocess_deskew(input_file, page_context):
 
 
 def preprocess_clean(input_file, page_context):
-    from .exec import unpaper
-
     output_file = page_context.get_path('pp_clean.png')
     dpi = get_page_square_dpi(page_context.pageinfo, page_context.options)
     unpaper.clean(input_file, output_file, dpi.x, page_context.options.unpaper_args)
@@ -480,9 +477,6 @@ def create_ocr_image(image, page_context):
     output_file = page_context.get_path('ocr.png')
     options = page_context.options
     with Image.open(image) as im:
-        from PIL import ImageColor
-        from PIL import ImageDraw
-
         white = ImageColor.getcolor('#ffffff', im.mode)
         # pink = ImageColor.getcolor('#ff0080', im.mode)
         draw = ImageDraw.ImageDraw(im)
@@ -811,7 +805,7 @@ def merge_sidecars(txt_files, context):
     return output_file
 
 
-def copy_final(input_file, output_file, context):
+def copy_final(input_file, output_file, _context):
     log.debug('%s -> %s', input_file, output_file)
     with open(input_file, 'rb') as input_stream:
         if output_file == '-':
diff --git a/src/ocrmypdf/_sync.py b/src/ocrmypdf/_sync.py
index a6bc3093..1d256c92 100644
--- a/src/ocrmypdf/_sync.py
+++ b/src/ocrmypdf/_sync.py
@@ -15,7 +15,6 @@
 # You should have received a copy of the GNU General Public License
 # along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
 
-import importlib
 import logging
 import logging.handlers
 import os
@@ -27,13 +26,10 @@ from pathlib import Path
 from tempfile import mkdtemp
 
 import PIL
-import pluggy
 
-from ocrmypdf import pluginspec
 from ocrmypdf._concurrent import exec_progress_pool
 from ocrmypdf._graft import OcrGrafter
 from ocrmypdf._jobcontext import PdfContext, cleanup_working_files
-from ocrmypdf._logging import PageNumberFilter
 from ocrmypdf._pipeline import (
     convert_to_pdfa,
     copy_final,
@@ -372,7 +368,7 @@ def run_pipeline(options, *, plugin_manager, api=False):
         else:
             log.error(type(e).__name__)
         return e.exit_code
-    except (Exception if not api else NeverRaise) as e:
+    except (Exception if not api else NeverRaise) as e:  # pylint: disable=broad-except
         log.exception("An exception occurred while executing the pipeline")
         return ExitCode.other_error
     finally:
diff --git a/src/ocrmypdf/_validation.py b/src/ocrmypdf/_validation.py
index bfc25d02..0a755d3c 100644
--- a/src/ocrmypdf/_validation.py
+++ b/src/ocrmypdf/_validation.py
@@ -21,6 +21,7 @@ import locale
 import logging
 import os
 import sys
+import unicodedata
 from pathlib import Path
 from shutil import copyfileobj
 
@@ -284,8 +285,6 @@ def check_options_advanced(options):
 
 
 def check_options_metadata(options):
-    import unicodedata
-
     docinfo = [options.title, options.author, options.keywords, options.subject]
     for s in (m for m in docinfo if m):
         for c in s:
diff --git a/src/ocrmypdf/api.py b/src/ocrmypdf/api.py
index cc7e103f..16e151b2 100644
--- a/src/ocrmypdf/api.py
+++ b/src/ocrmypdf/api.py
@@ -19,7 +19,6 @@ import logging
 import os
 import sys
 from argparse import ArgumentParser
-from contextlib import suppress
 from enum import IntEnum
 from pathlib import Path
 from typing import Dict, Iterable
@@ -28,7 +27,7 @@ from ocrmypdf._logging import PageNumberFilter, TqdmConsole
 from ocrmypdf._plugin_manager import get_plugin_manager
 from ocrmypdf._sync import run_pipeline
 from ocrmypdf._validation import check_options
-from ocrmypdf.cli import get_parser, plugins_only_parser
+from ocrmypdf.cli import get_parser
 
 try:
     import coloredlogs
diff --git a/src/ocrmypdf/exec/tesseract.py b/src/ocrmypdf/exec/tesseract.py
index 4ebdb0cf..731746e4 100644
--- a/src/ocrmypdf/exec/tesseract.py
+++ b/src/ocrmypdf/exec/tesseract.py
@@ -25,13 +25,15 @@ from contextlib import suppress
 from os import fspath
 from subprocess import PIPE, STDOUT, CalledProcessError, TimeoutExpired
 
-from ..exceptions import (
+from PIL import Image
+
+from ocrmypdf.exceptions import (
     MissingDependencyError,
     SubprocessOutputError,
     TesseractConfigError,
 )
-from ..helpers import page_number, safe_symlink
-from . import get_version, run
+from ocrmypdf.exec import get_version, run
+from ocrmypdf.helpers import safe_symlink
 
 log = logging.getLogger(__name__)
 
@@ -133,7 +135,7 @@ def languages(tesseract_env=None):
     for line in output.splitlines():
         if line.startswith('Error'):
             raise MissingDependencyError(lang_error(output))
-    header, *rest = output.splitlines()
+    _header, *rest = output.splitlines()
     return set(lang.strip() for lang in rest)
 
 
@@ -227,18 +229,15 @@ def tesseract_log_output(stdout, input_file):
             tlog.info(line.strip())
 
 
-def page_timedout(input_file, timeout):
+def page_timedout(timeout):
     if timeout == 0:
         return
-    prefix = f"{(page_number(input_file)):4d}: [tesseract] "
-    log.warning(prefix + " took too long to OCR - skipping")
+    log.warning("[tesseract] took too long to OCR - skipping")
 
 
 def _generate_null_hocr(output_hocr, output_sidecar, image):
     """Produce a .hocr file that reports no text detected on a page that is
     the same size as the input image."""
-    from PIL import Image
-
     with Image.open(image) as im:
         w, h = im.size
 
@@ -293,7 +292,7 @@ def generate_hocr(
         # Generate a HOCR file with no recognized text if tesseract times out
         # Temporary workaround to hocrTransform not being able to function if
         # it does not have a valid hOCR file.
-        page_timedout(input_file, timeout)
+        page_timedout(timeout)
         _generate_null_hocr(output_hocr, output_sidecar, input_file)
     except CalledProcessError as e:
         tesseract_log_output(e.output, input_file)
@@ -389,7 +388,7 @@ def generate_pdf(
         if os.path.exists(prefix + '.txt'):
             shutil.move(prefix + '.txt', output_text)
     except TimeoutExpired:
-        page_timedout(input_image, timeout)
+        page_timedout(timeout)
         use_skip_page(text_only, skip_pdf, output_pdf, output_text)
     except CalledProcessError as e:
         tesseract_log_output(e.output, input_image)
diff --git a/src/ocrmypdf/helpers.py b/src/ocrmypdf/helpers.py
index 0bfe694a..46a9ea80 100644
--- a/src/ocrmypdf/helpers.py
+++ b/src/ocrmypdf/helpers.py
@@ -25,7 +25,7 @@ from collections.abc import Iterable
 from contextlib import suppress
 from functools import wraps
 from io import StringIO
-from math import inf, isclose
+from math import isclose
 from pathlib import Path
 
 import pikepdf
diff --git a/src/ocrmypdf/leptonica.py b/src/ocrmypdf/leptonica.py
index 328b0630..0a8f6cba 100644
--- a/src/ocrmypdf/leptonica.py
+++ b/src/ocrmypdf/leptonica.py
@@ -29,7 +29,7 @@ from collections.abc import Sequence
 from contextlib import suppress
 from ctypes.util import find_library
 from functools import lru_cache
-from io import BytesIO
+from io import BytesIO, UnsupportedOperation
 from os import fspath
 from tempfile import TemporaryFile
 
@@ -96,7 +96,6 @@ class _LeptonicaErrorTrap:
         self.no_stderr = False
 
     def __enter__(self):
-        from io import UnsupportedOperation
 
         self.tmpfile = TemporaryFile()
 
@@ -351,7 +350,7 @@ class Pix(LeptonicaObject):
             py_file.write(buffer)
 
     @classmethod
-    def frompil(self, pillow_image):
+    def frompil(cls, pillow_image):
         """Create a copy of a PIL.Image from this Pix"""
         bio = BytesIO()
         pillow_image.save(bio, format='png', compress_level=1)
@@ -363,7 +362,7 @@ class Pix(LeptonicaObject):
 
     def topil(self):
         """Returns a PIL.Image version of this Pix"""
-        from PIL import Image
+        from PIL import Image  # pylint: disable=import-outside-toplevel
 
         # Leptonica manages data in words, so it implicitly does an endian
         # swap.  Tell Pillow about this when it reads the data.
@@ -534,16 +533,7 @@ class Pix(LeptonicaObject):
             )
             return Pix(thresh_pix)
 
-    def crop_to_foreground(
-        self,
-        threshold=128,
-        mindist=70,
-        erasedist=30,
-        pagenum=0,
-        showmorph=0,
-        display=0,
-        pdfdir=ffi.NULL,
-    ):
+    def crop_to_foreground(self, threshold=128, mindist=70, erasedist=30, showmorph=0):
         if get_leptonica_version() < 'leptonica-1.76':
             # Leptonica 1.76 changed the API for pixFindPageForeground; we don't
             # support the old version
diff --git a/src/ocrmypdf/optimize.py b/src/ocrmypdf/optimize.py
index e4fc1048..7438c180 100644
--- a/src/ocrmypdf/optimize.py
+++ b/src/ocrmypdf/optimize.py
@@ -217,7 +217,7 @@ def extract_images(pike, root, options, extract_fn):
             result = extract_fn(
                 pike=pike, root=root, image=image, xref=xref, options=options
             )
-        except Exception as e:
+        except Exception as e:  # pylint: disable=broad-except
             log.debug("Image xref %s, error %s", xref, repr(e))
             errors += 1
         else:
@@ -422,12 +422,12 @@ def transcode_pngs(pike, images, image_name_fn, root, options):
             )
             continue
         if compdata.type == leptonica.lept.L_FLATE_ENCODE:
-            return rewrite_png(pike, im_obj, compdata, log)
+            return rewrite_png(pike, im_obj, compdata)
         elif compdata.type == leptonica.lept.L_G4_ENCODE:
-            return rewrite_png_as_g4(pike, im_obj, compdata, log)
+            return rewrite_png_as_g4(pike, im_obj, compdata)
 
 
-def rewrite_png_as_g4(pike, im_obj, compdata, log):
+def rewrite_png_as_g4(pike, im_obj, compdata):
     im_obj.BitsPerComponent = 1
     im_obj.Width = compdata.w
     im_obj.Height = compdata.h
@@ -447,7 +447,7 @@ def rewrite_png_as_g4(pike, im_obj, compdata, log):
     return
 
 
-def rewrite_png(pike, im_obj, compdata, log):
+def rewrite_png(pike, im_obj, compdata):
     # When a PNG is inserted into a PDF, we more or less copy the IDAT section from
     # the PDF and transfer the rest of the PNG headers to PDF image metadata.
     # One thing we have to do is tell the PDF reader whether a predictor was used
@@ -553,8 +553,8 @@ def optimize(input_file, output_file, context, save_settings):
 
 
 def main(infile, outfile, level, jobs=1):
-    from tempfile import TemporaryDirectory
-    from shutil import copy
+    from tempfile import TemporaryDirectory  # pylint: disable=import-outside-toplevel
+    from shutil import copy  # pylint: disable=import-outside-toplevel
 
     class OptimizeOptions:
         """Emulate ocrmypdf's options"""
diff --git a/src/ocrmypdf/pdfinfo/info.py b/src/ocrmypdf/pdfinfo/info.py
index 86bb059d..42ed372f 100644
--- a/src/ocrmypdf/pdfinfo/info.py
+++ b/src/ocrmypdf/pdfinfo/info.py
@@ -17,14 +17,13 @@
 # along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
 
 import logging
-import os
 import re
 from collections import defaultdict, namedtuple
 from decimal import Decimal
 from enum import Enum
 from functools import partial
 from math import hypot, isclose
-from os import PathLike, fspath
+from os import PathLike
 from pathlib import Path
 from warnings import warn
 
@@ -821,13 +820,14 @@ class PdfInfo:
 
 
 def main():
+    # pylint: disable=import-outside-toplevel
     import argparse
+    from pprint import pprint
 
     parser = argparse.ArgumentParser()
     parser.add_argument('infile')
     args = parser.parse_args()
     pagesinfo, pdfinfo = _pdf_get_all_pageinfo(args.infile)
-    from pprint import pprint
 
     pprint(pdfinfo)
     for page in pagesinfo:
diff --git a/tests/conftest.py b/tests/conftest.py
index 54960cdc..d1cc9ef1 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -24,7 +24,8 @@ from subprocess import PIPE, run
 
 import pytest
 
-from ocrmypdf import api, cli
+from ocrmypdf import api, cli, pdfinfo
+from ocrmypdf.exec import unpaper
 
 pytest_plugins = ['helpers_namespace']
 
@@ -62,10 +63,8 @@ def running_in_travis():
 @pytest.helpers.register
 def have_unpaper():
     try:
-        from ocrmypdf.exec import unpaper
-
         unpaper.version()
-    except Exception:
+    except Exception:  # pylint: disable=broad-except
         return False
     return True
 
@@ -95,7 +94,7 @@ assert ast.parse(WINDOWS_SHIM_TEMPLATE.format(spoofer=repr(r"C:\\Temp\\file.py")
 
 @pytest.helpers.register
 def spoof(tmp_path_factory, **kwargs):
-    """Modify PATH to override subprocess executables
+    r"""Modify PATH to override subprocess executables
 
     spoof(tmp_path_factory, program1='replacement', ...)
 
@@ -277,7 +276,12 @@ def run_ocrmypdf(input_file, output_file, *args, env=None, universal_newlines=Tr
     env['COVERAGE_PROCESS_START'] = os.fspath(coverage_rc)
 
     p = run(
-        p_args, stdout=PIPE, stderr=PIPE, universal_newlines=universal_newlines, env=env
+        p_args,
+        stdout=PIPE,
+        stderr=PIPE,
+        universal_newlines=universal_newlines,
+        env=env,
+        check=False,
     )
     # print(p.stderr)
     return p, p.stdout, p.stderr
@@ -285,8 +289,6 @@ def run_ocrmypdf(input_file, output_file, *args, env=None, universal_newlines=Tr
 
 @pytest.helpers.register
 def first_page_dimensions(pdf):
-    from ocrmypdf import pdfinfo
-
     info = pdfinfo.PdfInfo(pdf)
     page0 = info[0]
     return (page0.width_inches, page0.height_inches)
diff --git a/tests/test_main.py b/tests/test_main.py
index e69ed192..cca9c4eb 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -29,8 +29,7 @@ from PIL import Image
 
 import ocrmypdf
 from ocrmypdf.exceptions import ExitCode, MissingDependencyError
-from ocrmypdf.exec import ghostscript, tesseract
-from ocrmypdf.helpers import check_pdf
+from ocrmypdf.exec import get_version, ghostscript, tesseract
 from ocrmypdf.pdfa import file_claims_pdfa
 from ocrmypdf.pdfinfo import Colorspace, Encoding, PdfInfo
 
@@ -311,7 +310,7 @@ def test_pagesegmode(renderer, spoof_tesseract_cache, resources, outpdf):
 
 
 @pytest.mark.parametrize('renderer', RENDERERS)
-def test_tesseract_crash(renderer, spoof_tesseract_crash, resources, no_outpdf, caplog):
+def test_tesseract_crash(renderer, spoof_tesseract_crash, resources, no_outpdf):
     p, _, err = run_ocrmypdf(
         resources / 'ccitt.pdf',
         no_outpdf,
@@ -410,7 +409,7 @@ def test_destination_not_writable(spoof_tesseract_noop, resources, outdir):
     protected_file = outdir / 'protected.pdf'
     protected_file.touch()
     protected_file.chmod(0o400)  # Read-only
-    p, out, err = run_ocrmypdf(
+    p, _out, _err = run_ocrmypdf(
         resources / 'jbig2.pdf', protected_file, env=spoof_tesseract_noop
     )
     assert p.returncode == ExitCode.file_access_error, "Expected error"
@@ -448,7 +447,7 @@ THIS FILE IS INVALID
 '''
         )
 
-    p, out, err = run_ocrmypdf(
+    p, _out, err = run_ocrmypdf(
         resources / 'ccitt.pdf',
         outdir / 'out.pdf',
         '--pdf-renderer',
@@ -568,6 +567,7 @@ def test_compression_preserved(
             stdin=input_stream,
             universal_newlines=True,
             env=spoof_tesseract_noop,
+            check=False,
         )
 
         if im.mode in ('RGBA', 'LA'):
@@ -629,6 +629,7 @@ def test_compression_changed(
             stdin=input_stream,
             universal_newlines=True,
             env=spoof_tesseract_noop,
+            check=False,
         )
         assert p.returncode == ExitCode.ok, p.stderr
 
@@ -711,10 +712,10 @@ def test_pdfa_n(spoof_tesseract_cache, pdfa_level, resources, outpdf):
 )
 @pytest.mark.slow
 def test_decompression_bomb(resources, outpdf):
-    p, out, err = run_ocrmypdf(resources / 'hugemono.pdf', outpdf)
+    p, _out, err = run_ocrmypdf(resources / 'hugemono.pdf', outpdf)
     assert 'decompression bomb' in err
 
-    p, out, err = run_ocrmypdf(
+    p, _out, err = run_ocrmypdf(
         resources / 'hugemono.pdf', outpdf, '--max-image-mpixels', '2000'
     )
     assert p.returncode == 0
@@ -736,7 +737,7 @@ def test_text_curves(spoof_tesseract_noop, resources, outpdf):
 
 
 def test_output_is_dir(spoof_tesseract_noop, resources, outdir):
-    p, out, err = run_ocrmypdf(
+    p, _out, err = run_ocrmypdf(
         resources / 'trivial.pdf', outdir, '--force-ocr', env=spoof_tesseract_noop
     )
     assert p.returncode == ExitCode.file_access_error
@@ -747,7 +748,7 @@ def test_output_is_dir(spoof_tesseract_noop, resources, outdir):
 def test_output_is_symlink(spoof_tesseract_noop, resources, outdir):
     sym = Path(outdir / 'this_is_a_symlink')
     sym.symlink_to(outdir / 'out.pdf')
-    p, out, err = run_ocrmypdf(
+    p, _out, err = run_ocrmypdf(
         resources / 'trivial.pdf', sym, '--force-ocr', env=spoof_tesseract_noop
     )
     assert p.returncode == ExitCode.ok, err
@@ -761,8 +762,6 @@ def test_livecycle(resources, no_outpdf):
 
 
 def test_version_check():
-    from ocrmypdf.exec import get_version
-
     with pytest.raises(MissingDependencyError):
         get_version('NOT_FOUND_UNLIKELY_ON_PATH')
 
diff --git a/tests/test_metadata.py b/tests/test_metadata.py
index 102c9f28..9a92c65a 100644
--- a/tests/test_metadata.py
+++ b/tests/test_metadata.py
@@ -17,21 +17,18 @@
 
 
 import datetime
-import logging
 import mmap
-import os
 from datetime import timezone
 from os import fspath
-from pathlib import Path
-from shutil import copyfile, move
-from unittest.mock import MagicMock, patch
+from shutil import copyfile
+from unittest.mock import patch
 
 import pikepdf
 import pytest
 from pikepdf.models.metadata import decode_pdf_date
 
 from ocrmypdf._jobcontext import PdfContext
-from ocrmypdf._pipeline import convert_to_pdfa
+from ocrmypdf._pipeline import convert_to_pdfa, metadata_fixup
 from ocrmypdf.cli import get_parser
 from ocrmypdf.exceptions import ExitCode
 from ocrmypdf.pdfa import SRGB_ICC_PROFILE, file_claims_pdfa, generate_pdfa_ps
@@ -192,9 +189,8 @@ def test_xml_metadata_preserved(spoof_tesseract_noop, output_type, resources, ou
     input_file = resources / 'graph.pdf'
 
     try:
-        from libxmp import consts
-        from libxmp.utils import file_to_dict
-    except Exception:
+        from libxmp.utils import file_to_dict  # pylint: disable=import-outside-toplevel
+    except Exception:  # pylint: disable=broad-except
         pytest.skip("libxmp not available or libexempi3 not installed")
 
     before = file_to_dict(str(input_file))
@@ -290,8 +286,6 @@ def test_kodak_toc(resources, outpdf, spoof_tesseract_noop):
 
 
 def test_metadata_fixup_warning(resources, outdir, caplog):
-    from ocrmypdf._pipeline import metadata_fixup
-
     options = get_parser().parse_args(
         args=['--output-type', 'pdfa-2', 'graph.pdf', 'out.pdf']
     )
diff --git a/tests/test_optimize.py b/tests/test_optimize.py
index 36e00c5e..f9f6747c 100644
--- a/tests/test_optimize.py
+++ b/tests/test_optimize.py
@@ -15,7 +15,6 @@
 # You should have received a copy of the GNU General Public License
 # along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
 
-import logging
 from os import fspath
 from pathlib import Path
 
diff --git a/tests/test_tess4.py b/tests/test_tess4.py
index 33110a43..4fada7d4 100644
--- a/tests/test_tess4.py
+++ b/tests/test_tess4.py
@@ -18,7 +18,6 @@
 import logging
 import os
 import subprocess
-from contextlib import contextmanager
 from os import fspath
 from pathlib import Path
 
@@ -60,8 +59,8 @@ def test_skip_pages_does_not_replicate(resources, basename, outdir):
     for page in info:
         assert len(page.images) == 1, "skipped page was replicated"
 
-    for n in range(len(info_in)):
-        assert info[n].width_inches == info_in[n].width_inches
+    for n, info_out_n in enumerate(info):
+        assert info_out_n.width_inches == info_in[n].width_inches
 
 
 def test_content_preservation(resources, outpdf):
@@ -131,8 +130,7 @@ def test_image_too_large_pdf(monkeypatch, resources, outdir):
 
 
 def test_timeout(caplog):
-    tesseract.page_timedout('123456.png', 5)
-    assert "123456" in caplog.text
+    tesseract.page_timedout(5)
     assert "took too long" in caplog.text
 
 
diff --git a/tests/test_unpaper.py b/tests/test_unpaper.py
index 7753d340..836ef0a8 100644
--- a/tests/test_unpaper.py
+++ b/tests/test_unpaper.py
@@ -23,24 +23,15 @@ import pytest
 from ocrmypdf._validation import check_options
 from ocrmypdf.cli import get_parser
 from ocrmypdf.exceptions import ExitCode, MissingDependencyError
-from ocrmypdf.exec import unpaper
 
 # pytest.helpers is dynamic
-# pylint: disable=no-member
+# pylint: disable=no-member,redefined-outer-name
 # pylint: disable=w0612
 
 check_ocrmypdf = pytest.helpers.check_ocrmypdf
 run_ocrmypdf = pytest.helpers.run_ocrmypdf
 spoof = pytest.helpers.spoof
-
-
-def have_unpaper():
-    try:
-        unpaper.version()
-    except Exception:
-        return False
-    else:
-        return True
+have_unpaper = pytest.helpers.have_unpaper
 
 
 @pytest.fixture
diff --git a/tests/test_validation.py b/tests/test_validation.py
index 1a453e78..35c21fa0 100644
--- a/tests/test_validation.py
+++ b/tests/test_validation.py
@@ -145,9 +145,9 @@ def test_report_file_size(tmp_path, caplog):
 
 def test_false_action_store_true():
     opts = make_opts(keep_temporary_files=True)
-    assert opts.keep_temporary_files == True
+    assert opts.keep_temporary_files
     opts = make_opts(keep_temporary_files=False)
-    assert opts.keep_temporary_files == False
+    assert not opts.keep_temporary_files
 
 
 @pytest.mark.parametrize('progress_bar', [True, False])