diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 945b043e9..6948c21ee 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -3,7 +3,7 @@ ci:
 repos:
 - repo: https://github.com/astral-sh/ruff-pre-commit
   # Ruff version.
-  rev: 'v0.7.2'
+  rev: 'v0.8.1'
   hooks:
     # Run the formatter.
     - id: ruff-format
@@ -79,10 +79,6 @@ repos:
             narwhals/.*__init__.py|
             narwhals/.*typing\.py
           )
-- repo: https://github.com/kynan/nbstripout
-  rev: 0.8.0
-  hooks:
-    - id: nbstripout
 - repo: https://github.com/adamchainz/blacken-docs
   rev: "1.19.1"  # replace with latest tag on GitHub
   hooks:
diff --git a/narwhals/__init__.py b/narwhals/__init__.py
index 7b2b017ba..815c0675f 100644
--- a/narwhals/__init__.py
+++ b/narwhals/__init__.py
@@ -31,22 +31,22 @@
 from narwhals.dtypes import UInt64
 from narwhals.dtypes import Unknown
 from narwhals.expr import Expr
-from narwhals.expr import all_ as all
+from narwhals.expr import all_ as all  # noqa: A004
 from narwhals.expr import all_horizontal
 from narwhals.expr import any_horizontal
 from narwhals.expr import col
 from narwhals.expr import concat_str
-from narwhals.expr import len_ as len
+from narwhals.expr import len_ as len  # noqa: A004
 from narwhals.expr import lit
-from narwhals.expr import max
+from narwhals.expr import max  # noqa: A004
 from narwhals.expr import max_horizontal
 from narwhals.expr import mean
 from narwhals.expr import mean_horizontal
 from narwhals.expr import median
-from narwhals.expr import min
+from narwhals.expr import min  # noqa: A004
 from narwhals.expr import min_horizontal
 from narwhals.expr import nth
-from narwhals.expr import sum
+from narwhals.expr import sum  # noqa: A004
 from narwhals.expr import sum_horizontal
 from narwhals.expr import when
 from narwhals.functions import concat
diff --git a/narwhals/stable/v1/selectors.py b/narwhals/stable/v1/selectors.py
index 0d82484e9..1545810e2 100644
--- a/narwhals/stable/v1/selectors.py
+++ b/narwhals/stable/v1/selectors.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from narwhals.selectors import all
+from narwhals.selectors import all  # noqa: A004
 from narwhals.selectors import boolean
 from narwhals.selectors import by_dtype
 from narwhals.selectors import categorical
diff --git a/pyproject.toml b/pyproject.toml
index e4c59b50a..5b191861b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,6 @@ lint.select = [
 lint.ignore = [
   "A001",
   "ARG002",
-  "ANN101",
   "ANN401",
   "C901",
   "COM812",
diff --git a/tests/selectors_test.py b/tests/selectors_test.py
index 8a2194caf..9fba60166 100644
--- a/tests/selectors_test.py
+++ b/tests/selectors_test.py
@@ -5,7 +5,7 @@
 import pytest
 
 import narwhals.stable.v1 as nw
-from narwhals.stable.v1.selectors import all
+from narwhals.stable.v1.selectors import all  # noqa: A004
 from narwhals.stable.v1.selectors import boolean
 from narwhals.stable.v1.selectors import by_dtype
 from narwhals.stable.v1.selectors import categorical
diff --git a/tests/utils.py b/tests/utils.py
index 95ccda816..fb8b28a92 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -63,10 +63,9 @@ def assert_equal_data(result: Any, expected: dict[str, Any]) -> None:
         for key in result.columns:
             assert key in expected, (key, expected)
     result = {key: _to_comparable_list(result[key]) for key in expected}
-    for key in expected:
-        result_key = result[key]
-        expected_key = expected[key]
-        for i, (lhs, rhs) in enumerate(zip_strict(result_key, expected_key)):
+    for key, expected_value in expected.items():
+        result_value = result[key]
+        for i, (lhs, rhs) in enumerate(zip_strict(result_value, expected_value)):
             if isinstance(lhs, float) and not math.isnan(lhs):
                 are_equivalent_values = math.isclose(lhs, rhs, rel_tol=0, abs_tol=1e-6)
             elif isinstance(lhs, float) and math.isnan(lhs) and rhs is not None: