diff --git a/tests/test_config.py b/tests/test_config.py
index b5aa0c4c61..ede15c5010 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -398,23 +398,22 @@ def test_conf_py_language_none(tempdir):
     assert cfg.language == "en"
 
 
-def test_conf_py_language_none_warning(tempdir, caplog):
+@mock.patch("sphinx.config.logger")
+def test_conf_py_language_none_warning(logger, tempdir):
     """Regression test for #10474."""
 
     # Given a conf.py file with language = None
     (tempdir / 'conf.py').write_text("language = None", encoding='utf-8')
 
     # When we load conf.py into a Config object
-    with caplog.at_level(logging.DEBUG):
-        Config.read(tempdir, {}, None)
+    Config.read(tempdir, {}, None)
 
     # Then a warning is raised
-    assert len(caplog.records) == 1
-    assert caplog.records[0].getMessage() == (
+    assert logger.warning.called
+    assert logger.warning.call_args[0][0] == (
         "Invalid configuration value found: 'language = None'. "
         "Update your configuration to a valid langauge code. "
         "Falling back to 'en' (English).")
-    assert caplog.records[0].levelname == "WARNING"
 
 
 def test_conf_py_no_language(tempdir):