diff --git a/src/flask/app.py b/src/flask/app.py
index c14360e3..c5b4205a 100644
--- a/src/flask/app.py
+++ b/src/flask/app.py
@@ -5,6 +5,7 @@ import inspect
 import os
 import sys
 import typing as t
+import warnings
 import weakref
 from datetime import timedelta
 from functools import update_wrapper
@@ -12,7 +13,6 @@ from inspect import iscoroutinefunction
 from itertools import chain
 from types import TracebackType
 from urllib.parse import quote as _url_quote
-import warnings
 
 import click
 from werkzeug.datastructures import Headers
@@ -252,8 +252,6 @@ class Flask(App):
     session_interface: SessionInterface = SecureCookieSessionInterface()
 
     def __init_subclass__(cls, **kwargs: t.Any) -> None:
-        import warnings
-
         # These method signatures were updated to take a ctx param. Detect
         # overridden methods in subclasses that still have the old signature.
         # Show a deprecation warning and wrap to call with correct args.
@@ -1598,7 +1596,6 @@ class Flask(App):
 
         Kept for backwards compatibility — it always returns False.
         """
-        import warnings
         warnings.warn(
             "Flask.should_ignore_error is deprecated and will be removed in a "
             "future release. It currently always returns False and should not be used.",
diff --git a/tests/test_should_ignore_error.py b/tests/test_should_ignore_error.py
index 8348aa39..29c343c1 100644
--- a/tests/test_should_ignore_error.py
+++ b/tests/test_should_ignore_error.py
@@ -1,12 +1,15 @@
 import pytest
+
 from flask import Flask
 
+
 def test_should_ignore_error_deprecation_warning():
     """Minimal test: check DeprecationWarning and return value."""
     app = Flask(__name__)
     with pytest.warns(DeprecationWarning):
         assert app.should_ignore_error(None) is False
 
+
 @pytest.mark.parametrize("error", [Exception(), ValueError(), RuntimeError()])
 def test_should_ignore_error_multiple_exceptions(error):
     """Verify that should_ignore_error issues a DeprecationWarning for multiple exception types."""
@@ -14,6 +17,7 @@ def test_should_ignore_error_multiple_exceptions(error):
     with pytest.warns(DeprecationWarning):
         assert app.should_ignore_error(error) is False
 
+
 def test_should_ignore_error_returns_false():
     """Verify that should_ignore_error always returns False."""
     app = Flask(__name__)
@@ -21,9 +25,10 @@ def test_should_ignore_error_returns_false():
         result = app.should_ignore_error(Exception())
         assert result is False
 
+
 def test_should_ignore_error_warning_repeated_calls():
     """Verify repeated calls each trigger a DeprecationWarning."""
     app = Flask(__name__)
     for _ in range(3):
         with pytest.warns(DeprecationWarning):
-            assert app.should_ignore_error(Exception()) is False
\ No newline at end of file
+            assert app.should_ignore_error(Exception()) is False