diff --git a/Makefile b/Makefile
index b08e03c..824a1f7 100644
--- a/Makefile
+++ b/Makefile
@@ -51,8 +51,8 @@ clean-test: ## remove test and coverage artifacts
 	rm -fr htmlcov/
 
 lint: ## reformat with black and check style with flake8
-	.venv/bin/ruff format src tests noxfile.py
-	.venv/bin/ruff check src tests noxfile.py
+	.venv/bin/ruff format superx_budget tests
+	.venv/bin/ruff check superx_budget tests
 
 test: lint ## run tests quickly with the default Python
 	.venv/bin/pytest tests -x --disable-warnings -m "not fun"
diff --git a/pyproject.toml b/pyproject.toml
index 2d56c72..b2be9ba 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ name = "superx_budget"
 readme = "README.md"
 description = "Creating a budget overview from a SuperX export."
 license = { file = "LICENSE" }
-requires-python = ">=3.7"
+requires-python = ">=3.10"
 dynamic = ["version"]
 
 authors = [
@@ -20,8 +20,8 @@ authors = [
 classifiers = [
     "Development Status :: 2 - Pre-Alpha",
     "Intended Audience :: Developers",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3 :: Only",
     "License :: Freely Distributable",
 ]
@@ -96,6 +96,16 @@ ignore = [
     # ignored, due to Windows / WSL2 setup
     # flake8-executable
     "EXE",
+
+    # ignored, not really working with datetimes
+    # just retrieving the year
+    "DTZ",
+
+    # TODO
+    # checkis for moving project to rust
+    "ANN",
+    "TID252",
+    "PYI024",
 ]
 
 [tool.ruff.lint.pydocstyle]
diff --git a/superx_budget/__init__.py b/superx_budget/__init__.py
index dcf75e4..60286b5 100644
--- a/superx_budget/__init__.py
+++ b/superx_budget/__init__.py
@@ -1,4 +1,4 @@
-""" superx_budget
+"""superx_budget
 
 Creating a budget overview from a SuperX export
 """
@@ -6,14 +6,14 @@ Creating a budget overview from a SuperX export
 __version__ = "0.0.1"
 
 from .budget import parse_budget_file  # noqa: F401
-from .superx import parse_exported_file  # noqa: F401
+from .exceptions import BudgetParserError, SuperXParserError  # noqa: F401
 from .helpers import (  # noqa: F401
-    find_recipients,
     find_budget_file,
+    find_recipients,
     get_sheet_of_file,
-    list_budget_files,
     is_budget_file_name,
+    list_budget_files,
 )
-from .pyramid import main  # noqa: F401
 from .overview import create_overview  # noqa: F401
-from .exceptions import BudgetParserError, SuperXParserError  # noqa: F401
+from .pyramid import main  # noqa: F401
+from .superx import parse_exported_file  # noqa: F401
diff --git a/superx_budget/budget.py b/superx_budget/budget.py
index df2543d..6cbe193 100644
--- a/superx_budget/budget.py
+++ b/superx_budget/budget.py
@@ -1,9 +1,13 @@
-""" Budget Parser """
+"""Budget Parser"""
 
+import typing
 from collections import namedtuple
 
-from .helpers import get_sheet_of_file, strip_excel_value, is_empty_excel_value
 from .exceptions import BudgetParserError
+from .helpers import get_sheet_of_file, is_empty_excel_value, strip_excel_value
+
+ExcelStuff = typing.Any
+T = typing.TypeVar("T")
 
 EXPECTED_TABLE_HEADERS = [
     "Nr.",
@@ -36,17 +40,18 @@ BudgetData = namedtuple(
 )
 
 
-def _check_table_header(xl_row):
+def _check_table_header(xl_row: ExcelStuff) -> None:
     fields_ignore_none = (
         ("" if c is None else c) for c in xl_row.data[:NUM_EXPECTED_HEADERS]
     )
     fields_str = (str(c) for c in fields_ignore_none)
     fields = [c.strip() for c in fields_str]
     if fields != EXPECTED_TABLE_HEADERS:
-        raise BudgetParserError(f"unexpected headers: '{xl_row.data}'")
+        msg = f"unexpected headers: '{xl_row.data}'"
+        raise BudgetParserError(msg)
 
 
-def _skip_empty_lines(rows):
+def _skip_empty_lines(rows: ExcelStuff) -> typing.Iterable[T]:
     for xl_row in rows:
         first_cell = xl_row.data[0]
         if is_empty_excel_value(first_cell):
@@ -54,7 +59,7 @@ def _skip_empty_lines(rows):
         yield xl_row
 
 
-def _parse_data_table(rows):
+def _parse_data_table(rows: ExcelStuff) -> BudgetData:
     for xl_row in _skip_empty_lines(rows):
         data = [
             strip_excel_value(value)
@@ -63,14 +68,14 @@ def _parse_data_table(rows):
         yield BudgetData(xl_row.row, *data)
 
 
-def parse_budget_data(xls_sheet):
+def parse_budget_data(xls_sheet: ExcelStuff) -> list[BudgetData]:
     """parses the budget data"""
     rows = (ExcelRow(i, v) for i, v in enumerate(xls_sheet.values, start=1))
     _check_table_header(next(rows))
     return list(_parse_data_table(rows))
 
 
-def parse_budget_file(file_path):
+def parse_budget_file(file_path: str) -> list[BudgetData]:
     """parses the budget file"""
     sheet = get_sheet_of_file(file_path, sheet=None)
     return parse_budget_data(sheet)
diff --git a/superx_budget/exceptions.py b/superx_budget/exceptions.py
index 0d880ea..d66ac25 100644
--- a/superx_budget/exceptions.py
+++ b/superx_budget/exceptions.py
@@ -1,4 +1,4 @@
-""" Exceptions used in the Project """
+"""Exceptions used in the Project"""
 
 
 class SuperXBudgetError(ValueError):
diff --git a/superx_budget/helpers.py b/superx_budget/helpers.py
index eceaca1..f70425a 100644
--- a/superx_budget/helpers.py
+++ b/superx_budget/helpers.py
@@ -1,13 +1,16 @@
-""" some helper functions """
+"""some helper functions"""
 
 from pathlib import Path
+from typing import TypeVar
 
 import openpyxl
 
+ExcelItem = TypeVar("ExcelItem")
+
 DEFAULT_RECIPIENTS = ["frey@imtek.de"]
 
 
-def excel_value_as_number(value):
+def excel_value_as_number(value: ExcelItem) -> float | int:
     if value is None:
         return 0
     if isinstance(value, str):
@@ -18,7 +21,7 @@ def excel_value_as_number(value):
     return value
 
 
-def get_sheet_of_file(excel_file, sheet=None):
+def get_sheet_of_file(excel_file: str, sheet: str | None = None) -> ExcelItem:
     """returns a sheet from an excel FileCache
 
     if name is set to None, the function returns the first sheet
@@ -30,51 +33,52 @@ def get_sheet_of_file(excel_file, sheet=None):
     return workbook[sheet]
 
 
-def is_empty_excel_value(value):
+def is_empty_excel_value(value: ExcelItem) -> bool:
     """is the cell value considered empty"""
     if value is None:
         return True
-    if isinstance(value, str) and value.strip() == "":
-        return True
-    return False
+    return isinstance(value, str) and value.strip() == ""
 
 
-def strip_excel_value(value):
+def strip_excel_value(value: ExcelItem) -> str | ExcelItem:
     """remove whitespace from an excel value if it is a string"""
     if isinstance(value, str):
         return value.strip()
     return value
 
 
-def is_budget_file_name(path_or_name):
+def is_budget_file_name(path_or_name: str | Path) -> bool:
     """checks if a filename has the format "budget[...]-<year>.xlsx"""
     path = Path(path_or_name)
-    if not path.suffix.lower() == ".xlsx":
+    if path.suffix.lower() != ".xlsx":
         return False
     if not path.name.lower().startswith("budget"):
         return False
     try:
-        return int(path.stem[-5:]) <= -2019
+        return int(path.stem[-5:]) <= -2019  # noqa: PLR2004
     except ValueError:
         pass
     return False
 
 
-def list_budget_files(folder):
+def list_budget_files(folder: str | Path) -> list[Path]:
     """lists all files with the name "budget[...]-<year>.xlsx"""
     files = (i for i in Path(folder).iterdir() if i.is_file())
     visible = (i for i in files if not i.name.startswith("."))
     return [i for i in visible if is_budget_file_name(i)]
 
 
-def find_budget_file(folder, year):
+def find_budget_file(folder: str | Path, year: str | int) -> Path | None:
     """searches for a file with the name "budget[...]-<year>.xlsx"""
     for path in list_budget_files(folder):
         if path.stem.endswith(f"-{year}"):
             return path
+    return None
 
 
-def find_recipients(folder, filename="recipients.txt"):
+def find_recipients(
+    folder: str | Path, filename: str = "recipients.txt"
+) -> list[str]:
     """finds the recipients of the budget list"""
     file_path = folder / filename
     if file_path.is_file():
diff --git a/superx_budget/overview.py b/superx_budget/overview.py
index a6b8952..e9e3c32 100644
--- a/superx_budget/overview.py
+++ b/superx_budget/overview.py
@@ -66,11 +66,11 @@ class ProjectOverview:
 
 def _create_overview_map(budget_list):
     """returns a dictonary with project as key and overview as value"""
-    map = {}
+    mapping = {}
     for budget_data in budget_list:
         overview = ProjectOverview(budget_data)
-        map[str(overview.project)] = overview
-    return map
+        mapping[str(overview.project)] = overview
+    return mapping
 
 
 def _filter_superx_material_expenses(superx_export):
diff --git a/superx_budget/pyramid/__init__.py b/superx_budget/pyramid/__init__.py
index cf6f81c..936f726 100644
--- a/superx_budget/pyramid/__init__.py
+++ b/superx_budget/pyramid/__init__.py
@@ -1,31 +1,29 @@
-""" Superx Budget GUI """
+"""Superx Budget GUI"""
 
 from pathlib import Path
 
-from pyramid.view import notfound_view_config
+from pyramid.authorization import Allow, Authenticated, Everyone
 from pyramid.config import Configurator
-from pyramid.session import JSONSerializer, SignedCookieSessionFactory
-from pyramid.authorization import Allow, Everyone, Authenticated
 from pyramid.httpexceptions import HTTPFound
+from pyramid.session import JSONSerializer, SignedCookieSessionFactory
+from pyramid.view import notfound_view_config
 
-from ..overview import create_overview  # noqa: F401
 from ..exceptions import BudgetParserError, SuperXParserError  # noqa: F401
+from ..overview import create_overview  # noqa: F401
 
 XLSX_CONTENT_TYPE = "application/octet-stream"
 
 
 class Root:
-
-    __acl__ = [(Allow, Everyone, "login"), (Allow, Authenticated, "view")]
+    __acl__ = [(Allow, Everyone, "login"), (Allow, Authenticated, "view")]  # noqa: RUF012
 
     def __init__(self, request):
         pass
 
 
-def main(global_config, **settings):
+def main(global_config, **settings):  # noqa: ARG001
     """This function returns a Pyramid WSGI application."""
     with Configurator(settings=settings) as config:
-
         session_factory = SignedCookieSessionFactory(
             settings["session.secret"], serializer=JSONSerializer()
         )
@@ -34,7 +32,11 @@ def main(global_config, **settings):
         config.set_root_factory(Root)
 
         config.add_request_method(
-            lambda r: Path(settings["budgets.dir"]), "budgets_dir", reify=True
+            lambda r: Path(  # noqa: ARG005
+                settings["budgets.dir"]
+            ),
+            "budgets_dir",
+            reify=True,
         )
 
         age = int(settings.get("static_views.cache_max_age", 0))
@@ -49,5 +51,5 @@ def main(global_config, **settings):
 
 
 @notfound_view_config()
-def not_found(context, request):
+def not_found(context, request):  # noqa: ARG001
     return HTTPFound("/")
diff --git a/superx_budget/pyramid/overview.py b/superx_budget/pyramid/overview.py
index 347340a..1fe2db1 100644
--- a/superx_budget/pyramid/overview.py
+++ b/superx_budget/pyramid/overview.py
@@ -1,17 +1,17 @@
-""" Views for the create overview part """
+"""Views for the create overview part"""
 
 from tempfile import NamedTemporaryFile
 
-from pyramid.view import view_config
 from pyramid.httpexceptions import HTTPFound
-from pyramid_mailer.message import Message, Attachment
+from pyramid.view import view_config
+from pyramid_mailer.message import Attachment, Message
 
-from . import XLSX_CONTENT_TYPE, Root
 from ..budget import parse_budget_file
+from ..exceptions import BudgetParserError, SuperXParserError
+from ..helpers import find_budget_file, find_recipients, get_sheet_of_file
+from ..overview import create_overview
 from ..superx import parse_exported_file
-from ..helpers import find_recipients, find_budget_file, get_sheet_of_file
-from ..overview import create_overview  # noqa: F401
-from ..exceptions import BudgetParserError, SuperXParserError  # noqa: F401
+from . import XLSX_CONTENT_TYPE, Root
 
 MAIL_MESSAGE_BODY = """Hallo an Alle,
 
@@ -35,10 +35,10 @@ def _map_from_form_data(request, prefix):
             row_str = key.split("-")[-1]
             row = int(row_str)
             try:
-                value = float(value)
+                as_number = float(value)
             except ValueError:
-                value = 0
-            result[row] = value
+                as_number = 0
+            result[row] = as_number
     return result
 
 
@@ -48,7 +48,7 @@ def _map_from_form_data(request, prefix):
     renderer="superx_budget:pyramid/templates/start.jinja2",
     permission="view",
 )
-def index(context, request):
+def index(context, request):  # noqa: ARG001
     return {}
 
 
@@ -58,7 +58,7 @@ def index(context, request):
     renderer="superx_budget:pyramid/templates/overview.jinja2",
     permission="view",
 )
-def superx_upload(context, request):
+def superx_upload(context, request):  # noqa: ARG001
     upload = request.POST.get("superx")
 
     if upload == b"" or not upload.filename.endswith(".xlsx"):
@@ -122,7 +122,7 @@ def superx_upload(context, request):
     renderer="superx_budget:pyramid/templates/sent.jinja2",
     permission="view",
 )
-def send_overview(context, request):
+def send_overview(context, request):  # noqa: ARG001
     export_date = request.POST.get("export_date").strip()
     tmp_recipients = request.POST.get("recipients").strip()
     recipients = tmp_recipients.splitlines()
@@ -165,7 +165,7 @@ def send_overview(context, request):
 
     xls_name = f"{export_date}-Budget-Overview-{budget_year}.xlsx"
     with NamedTemporaryFile() as tmp:
-        sheet._parent.save(tmp.name)
+        sheet._parent.save(tmp.name)  # noqa: SLF001
         tmp.seek(0)
         attachment = Attachment(xls_name, XLSX_CONTENT_TYPE, tmp)
         message.attach(attachment)
diff --git a/superx_budget/pyramid/security.py b/superx_budget/pyramid/security.py
index 6d2c640..b546367 100644
--- a/superx_budget/pyramid/security.py
+++ b/superx_budget/pyramid/security.py
@@ -1,9 +1,9 @@
 from passlib.hash import argon2
-from pyramid.view import view_config, forbidden_view_config
-from pyramid.security import forget, remember
-from pyramid.authorization import ACLAuthorizationPolicy
 from pyramid.authentication import AuthTktAuthenticationPolicy
+from pyramid.authorization import ACLAuthorizationPolicy
 from pyramid.httpexceptions import HTTPFound
+from pyramid.security import forget, remember
+from pyramid.view import forbidden_view_config, view_config
 
 from . import Root
 
@@ -15,6 +15,7 @@ class MyAuthenticationPolicy(AuthTktAuthenticationPolicy):
         user = request.user
         if user is not None:
             return AUTHENTICATED_USER_ID
+        return None
 
 
 def get_user(request):
@@ -22,7 +23,7 @@ def get_user(request):
 
 
 @forbidden_view_config(renderer="superx_budget:pyramid/templates/login.jinja2")
-def forbidden_view(request):
+def forbidden_view(request):  # noqa: ARG001
     return {"error": False}
 
 
@@ -54,11 +55,11 @@ def includeme(config):
     config.set_authentication_policy(authn_policy)
     config.set_authorization_policy(ACLAuthorizationPolicy())
 
-    hashes = [hash for hash in settings["pwd.db"].splitlines() if hash]
+    hashes = [hashed for hashed in settings["pwd.db"].splitlines() if hashed]
 
     def check_password(request):
         password = request.POST.get("password", "")
-        return any(argon2.verify(password, hash) for hash in hashes)
+        return any(argon2.verify(password, hashed) for hashed in hashes)
 
     config.add_request_method(check_password, "check_password")
     config.add_request_method(get_user, "user", reify=True)
diff --git a/superx_budget/pyramid/templates.py b/superx_budget/pyramid/templates.py
index 248f998..b611cb4 100644
--- a/superx_budget/pyramid/templates.py
+++ b/superx_budget/pyramid/templates.py
@@ -1,16 +1,16 @@
-""" Views for the templates part """
+"""Views for the templates part"""
 
 from pathlib import Path
 
-from pyramid.view import view_config
-from pyramid.response import FileResponse
 from pyramid.httpexceptions import HTTPFound
+from pyramid.response import FileResponse
+from pyramid.view import view_config
 
-from . import XLSX_CONTENT_TYPE, Root
 from ..budget import parse_budget_file
-from ..helpers import list_budget_files, is_budget_file_name
-from ..overview import create_overview  # noqa: F401
 from ..exceptions import BudgetParserError, SuperXParserError  # noqa: F401
+from ..helpers import is_budget_file_name, list_budget_files
+from ..overview import create_overview  # noqa: F401
+from . import XLSX_CONTENT_TYPE, Root
 
 
 @view_config(
@@ -20,7 +20,7 @@ from ..exceptions import BudgetParserError, SuperXParserError  # noqa: F401
     renderer="superx_budget:pyramid/templates/templates.jinja2",
     permission="view",
 )
-def templates(context, request):
+def templates(context, request):  # noqa: ARG001
     if "f" in request.GET:
         file_name = request.GET["f"]
         file_path = request.budgets_dir / file_name
@@ -50,7 +50,7 @@ def templates(context, request):
     renderer="superx_budget:pyramid/templates/templates.jinja2",
     permission="view",
 )
-def templates_update(context, request):
+def templates_update(context, request):  # noqa: ARG001
     upload = request.POST.get("budget")
 
     if upload == b"" or not is_budget_file_name(upload.filename):
diff --git a/superx_budget/superx.py b/superx_budget/superx.py
index acc63fa..5566639 100644
--- a/superx_budget/superx.py
+++ b/superx_budget/superx.py
@@ -1,10 +1,10 @@
-""" SuperX Parser """
+"""SuperX Parser"""
 
-from datetime import datetime
 from collections import namedtuple
+from datetime import datetime
 
-from .helpers import get_sheet_of_file, strip_excel_value
 from .exceptions import SuperXParserError
+from .helpers import get_sheet_of_file, strip_excel_value
 
 EXPECTED_HEADLINE = "Verwendungsnachweis und Kassenstand SAP"
 EXPECTED_METADATA_KEYS = {"Haushaltsjahr", "Stand", "Gruppierung"}
@@ -36,7 +36,8 @@ def _check_export_headline(row):
     """checks the first line of the excel data if it's what we'd expect"""
     headline = row[0]
     if headline != EXPECTED_HEADLINE:
-        raise SuperXParserError(f"unexpected headline: '{headline}'")
+        msg = f"unexpected headline: '{headline}'"
+        raise SuperXParserError(msg)
 
 
 def _get_export_metadata(row):
@@ -46,11 +47,11 @@ def _get_export_metadata(row):
     parts = [entry.split(":", 1) for entry in entries]
     metadata = {key.strip(): value.strip() for key, value in parts}
     if EXPECTED_METADATA_KEYS - set(metadata.keys()):
-        raise SuperXParserError(f"unexpected metadata: '{data}'")
+        msg = f"unexpected metadata: '{data}'"
+        raise SuperXParserError(msg)
     if metadata["Gruppierung"] != EXPECTED_EXPORT_GROUPING:
-        raise SuperXParserError(
-            f"unexpected grouping: {metadata['Gruppierung']}"
-        )
+        msg = f"unexpected grouping: {metadata['Gruppierung']}"
+        raise SuperXParserError(msg)
     date_part, *rest = metadata["Stand"].split(",")
     return SuperXResult(
         metadata["Haushaltsjahr"],
@@ -66,7 +67,8 @@ def _skip_export_data_until_table_header(rows):
         if first_cell == EXPECTED_DATA_TABLE_HEADER:
             break
     else:
-        raise SuperXParserError("could not find table header")
+        msg = "could not find table header"
+        raise SuperXParserError(msg)
 
 
 def _parse_data_table(rows):
@@ -80,7 +82,7 @@ def _parse_data_table(rows):
 
 def parse_export_data(xls_sheet):
     """parses the exported superx data"""
-    rows = xls_sheet.values
+    rows = xls_sheet.values  # noqa: PD011
     _check_export_headline(next(rows))
     metadata = _get_export_metadata(next(rows))
     _skip_export_data_until_table_header(rows)
diff --git a/tests/conftest.py b/tests/conftest.py
index 5b809f3..5b6328b 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,4 +1,4 @@
-""" Global test fixtures and Mocks """
+"""Global test fixtures and Mocks"""
 
 from pathlib import Path
 
@@ -17,7 +17,7 @@ class MockWorkbookSheet:
 @pytest.fixture
 def example_root(request):
     root_dir = Path(request.config.rootdir)
-    yield root_dir / "test_data"
+    return root_dir / "test_data"
 
 
 @pytest.fixture
@@ -29,14 +29,14 @@ def budget_example_file(example_root):
 def budget_example_workbook(budget_example_file):
     import openpyxl
 
-    yield openpyxl.open(budget_example_file)
+    return openpyxl.open(budget_example_file)
 
 
 @pytest.fixture
 def budget_example_sheet(budget_example_workbook):
     sheets = budget_example_workbook.sheetnames
     first = sheets[0]
-    yield budget_example_workbook[first]
+    return budget_example_workbook[first]
 
 
 @pytest.fixture
@@ -48,4 +48,4 @@ def superx_example_file(example_root):
 def superx_example_workbook(superx_example_file):
     import openpyxl
 
-    yield openpyxl.open(superx_example_file)
+    return openpyxl.open(superx_example_file)
diff --git a/tests/test_helpers.py b/tests/test_helpers.py
index bdbd509..d4db790 100644
--- a/tests/test_helpers.py
+++ b/tests/test_helpers.py
@@ -2,7 +2,7 @@ import pytest
 
 
 @pytest.mark.parametrize(
-    "input,expected",
+    ("given", "expected"),
     [
         ("a", False),
         ("", True),
@@ -13,16 +13,16 @@ import pytest
         (2.2, False),
     ],
 )
-def test_is_empty_excel_value(input, expected):
+def test_is_empty_excel_value(given, expected):
     from superx_budget.helpers import is_empty_excel_value
 
-    result = is_empty_excel_value(input)
+    result = is_empty_excel_value(given)
 
     assert result == expected
 
 
 @pytest.mark.parametrize(
-    "input,expected",
+    ("given", "expected"),
     [
         ("a", "a"),
         ("", ""),
@@ -33,10 +33,10 @@ def test_is_empty_excel_value(input, expected):
         (2.2, 2.2),
     ],
 )
-def test_strip_excel_value(input, expected):
+def test_strip_excel_value(given, expected):
     from superx_budget.helpers import strip_excel_value
 
-    result = strip_excel_value(input)
+    result = strip_excel_value(given)
 
     assert result == expected
 
@@ -62,7 +62,7 @@ def test_get_sheet_of_file_named(budget_example_file):
 
 
 @pytest.mark.parametrize(
-    "input,expected",
+    ("given", "expected"),
     [
         (None, 0),
         ("", 0),
@@ -73,16 +73,16 @@ def test_get_sheet_of_file_named(budget_example_file):
         (2.4, 2.4),
     ],
 )
-def test_excel_value_as_number(input, expected):
+def test_excel_value_as_number(given, expected):
     from superx_budget.helpers import excel_value_as_number
 
-    result = excel_value_as_number(input)
+    result = excel_value_as_number(given)
 
     assert result == expected
 
 
 @pytest.mark.parametrize(
-    "name,expected",
+    ("name", "expected"),
     [
         ("budget-2019.xlsx", True),
         ("budget-template-2020.xlsx", True),
diff --git a/tests/test_overview.py b/tests/test_overview.py
index 0fbc1f0..4ae1a5b 100644
--- a/tests/test_overview.py
+++ b/tests/test_overview.py
@@ -17,7 +17,7 @@ def example_budget_data():
         0,
     )
 
-    yield example
+    return example  # noqa: RET504
 
 
 def test_project_overview_init(example_budget_data):
@@ -46,7 +46,7 @@ def test_project_overview_row_property(example_budget_data):
 
 
 def test_project_overview_add(example_budget_data):
-    from superx_budget.overview import ProjectOverview, OverviewBudgetEntry
+    from superx_budget.overview import OverviewBudgetEntry, ProjectOverview
 
     over = ProjectOverview(example_budget_data)
     over.add("Sachmittel", "Obligo", -100)
@@ -94,11 +94,11 @@ def test_create_overview_map(budget_example_file):
 
 def test_create_entries_from_export(budget_example_file, superx_example_file):
     from superx_budget.budget import parse_budget_file
-    from superx_budget.superx import parse_exported_file
     from superx_budget.overview import (
-        _create_overview_map,
         _create_entries_from_superx,
+        _create_overview_map,
     )
+    from superx_budget.superx import parse_exported_file
 
     superx_data = parse_exported_file(superx_example_file)
     budget_data = parse_budget_file(budget_example_file)
@@ -111,11 +111,11 @@ def test_create_entries_from_export(budget_example_file, superx_example_file):
 
 
 def test_filter_superx_material_expenses(superx_example_file):
-    from superx_budget.superx import parse_exported_file
     from superx_budget.overview import (
         VALID_MATERIAL_IDS,
         _filter_superx_material_expenses,
     )
+    from superx_budget.superx import parse_exported_file
 
     superx_data = parse_exported_file(superx_example_file)
     result = list(_filter_superx_material_expenses(superx_data))
@@ -127,8 +127,8 @@ def test_filter_superx_material_expenses(superx_example_file):
 
 def test_create_overview(budget_example_file, superx_example_file):
     from superx_budget.budget import parse_budget_file
-    from superx_budget.superx import parse_exported_file
     from superx_budget.overview import create_overview
+    from superx_budget.superx import parse_exported_file
 
     superx_data = parse_exported_file(superx_example_file)
     budget_data = parse_budget_file(budget_example_file)
diff --git a/tests/test_superx_parser.py b/tests/test_superx_parser.py
index 3ae28a5..5fe31dc 100644
--- a/tests/test_superx_parser.py
+++ b/tests/test_superx_parser.py
@@ -1,11 +1,11 @@
-""" Stub file for testing the project """
+"""Stub file for testing the project"""
 
 import pytest
 
 
 def test_check_export_headline():
-    from superx_budget.superx import _check_export_headline
     from superx_budget.exceptions import SuperXParserError
+    from superx_budget.superx import _check_export_headline
 
     row = ["nomatching header"]
 
@@ -42,9 +42,7 @@ def test_get_export_metadata_raises_error(faulty_data):
 
     row = [faulty_data]
 
-    with pytest.raises(
-        ValueError
-    ):  # SuperXParserError is a subclass of ValueError
+    with pytest.raises(ValueError):  # noqa: PT011
         _get_export_metadata(row)
 
 
@@ -60,8 +58,8 @@ def test_skip_export_data_until_table_header_ok():
 
 
 def test_skip_export_data_until_table_header_raises_error():
-    from superx_budget.superx import _skip_export_data_until_table_header
     from superx_budget.exceptions import SuperXParserError
+    from superx_budget.superx import _skip_export_data_until_table_header
 
     rows = [[""], [""], ["Keine Kostenstelle"], ["Daten"]]
     iterator = iter(rows)
@@ -73,7 +71,7 @@ def test_parse_data_table():
     from superx_budget.superx import _parse_data_table
 
     rows = [
-        ["A "] + list("BCDEFGHIJ"),
+        ["A ", *list("BCDEFGHIJ")],
         ["" for i in range(10)],
         list("qrstuvwxyzX"),  # one column more
     ]