[5.0.x] Fixed #34905 -- Corrected admin's main content element rendered in <main> tag.

Regression in 91e617c743b21a0ebad01f18623a8b31f6f58500.

Thanks Tom Carrick for the report.
Backport of 89d2ae257bfdbe6f32c4671d97bf572623992ace from main

2 files changed, 8 insertions, 1 deletions

diff --git a/tests/admin_views/test_nav_sidebar.py b/tests/admin_views/test_nav_sidebar.py
index 908ad52411..e9b367b63b 100644
--- a/tests/admin_views/test_nav_sidebar.py
+++ b/tests/admin_views/test_nav_sidebar.py
@@ -42,7 +42,7 @@ class AdminSidebarTests(TestCase):
 
     def test_sidebar_not_on_index(self):
         response = self.client.get(reverse("test_with_sidebar:index"))
-        self.assertContains(response, '<main class="main" id="main">')
+        self.assertContains(response, '<div class="main" id="main">')
         self.assertNotContains(
             response, '<nav class="sticky" id="nav-sidebar" aria-label="Sidebar">'
         )
diff --git a/tests/admin_views/tests.py b/tests/admin_views/tests.py
index 2e91e9d859..3ab9fd6a26 100644
--- a/tests/admin_views/tests.py
+++ b/tests/admin_views/tests.py
@@ -1591,6 +1591,13 @@ class AdminViewBasicTest(AdminViewBasicTestCase):
         response = self.client.get(reverse("admin:login"))
         self.assertContains(response, '<header id="header">')
 
+    def test_main_content(self):
+        response = self.client.get(reverse("admin:index"))
+        self.assertContains(
+            response,
+            '<main id="content-start" class="content" tabindex="-1">',
+        )
+
 
 @override_settings(
     AUTH_PASSWORD_VALIDATORS=[