diff --git a/codespell_lib/_codespell.py b/codespell_lib/_codespell.py
index dadb575378..f2c6c44cb6 100644
--- a/codespell_lib/_codespell.py
+++ b/codespell_lib/_codespell.py
@@ -26,7 +26,7 @@
 from typing import Dict, List, Match, Optional, Pattern, Sequence, Set, Tuple
 
 # autogenerated by setuptools_scm
-from ._version import __version__ as VERSION
+from ._version import __version__ as VERSION  # noqa: N812
 
 word_regex_def = "[\\w\\-'’`]+"
 # While we want to treat characters like ( or " as okay for a starting break,
@@ -228,7 +228,7 @@ def open_with_chardet(self, filename: str) -> Tuple[List[str], str]:
                     break
         self.encdetector.close()
         encoding = self.encdetector.result["encoding"]
-        assert encoding is not None
+        assert encoding is not None  # noqa: S101
 
         try:
             f = open(filename, encoding=encoding, newline="")
diff --git a/pyproject.toml b/pyproject.toml
index 99f14e7707..5944a2db79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -103,14 +103,9 @@ addopts = "--cov=codespell_lib -rs --cov-report= --tb=short --junit-xml=junit-re
 
 [tool.ruff]
 extend-ignore = [
-    "A003",
     "ANN101",
-    "ANN401",
     "B904",
-    "N802",
-    "N812",
     "PLW2901",
-    "S101",
 ]
 line-length = 88
 select = [
@@ -137,6 +132,11 @@ target-version = "py37"
 [tool.ruff.mccabe]
 max-complexity = 45
 
+[tool.ruff.per-file-ignores]
+"codespell_lib/_codespell.py" = ["A003"]
+"codespell_lib/tests/test_*" = ["S101"]
+"codespell_lib/tests/test_basic.py" = ["ANN401", "N802"]
+
 [tool.ruff.pylint]
 allow-magic-value-types = ["bytes", "int", "str",]
 max-args = 12