From 20a1775c833a4ff355b7401bfab3f0ce02f0babb Mon Sep 17 00:00:00 2001
From: Adam Turner <9087854+aa-turner@users.noreply.github.com>
Date: Fri, 27 May 2022 23:50:07 +0100
Subject: [PATCH] Add test

---
 tests/test_config.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tests/test_config.py b/tests/test_config.py
index 3d72a6b0f..dea741820 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -381,3 +381,17 @@ def test_nitpick_ignore_regex_fullmatch(app, status, warning):
     assert len(warning) == len(nitpick_warnings)
     for actual, expected in zip(warning, nitpick_warnings):
         assert expected in actual
+
+
+def test_conf_py_language_none(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
+    cfg = Config.read(tempdir, {}, None)
+    cfg.init_values()
+
+    # Then the language is coerced to English
+    assert cfg.language == "en"