diff --git a/tests/e2e/admin/notifications.py b/tests/e2e/admin/notifications.py
index e50a6ae5..f5f6b657 100644
--- a/tests/e2e/admin/notifications.py
+++ b/tests/e2e/admin/notifications.py
@@ -46,3 +46,44 @@ def test_member_cannot_set_default(bob):
     )
     assert response.status_code in (302, 303, 403)
     assert get_notification_default("level", "push") is True
+
+
+def test_admin_page_renders_participation_defaults(alice):
+    _, admin_user = alice
+    admin = _user_notification_prefs(admin_user["username"])
+    response = requests.get(
+        f"{BASE_URL}/admin/notifications",
+        headers={"X-API-KEY": admin["api_key"]},
+        allow_redirects=False,
+    )
+    assert response.status_code == 200
+    html = response.text
+
+    assert "Post participation" in html, (
+        "Admin notifications page should contain 'Post participation' label"
+    )
+    assert "Someone else comments on a post you also commented on" in html, (
+        "Admin notifications page should contain participation description"
+    )
+
+    assert 'data-type="participation" data-channel="in_app"' in html, (
+        "Participation in_app row should exist"
+    )
+    assert 'data-type="participation" data-channel="in_app" checked' in html, (
+        "Participation in_app default should be checked (on)"
+    )
+
+    assert 'data-type="participation" data-channel="push"' in html, (
+        "Participation push row should exist"
+    )
+    assert 'data-type="participation" data-channel="push" checked' in html, (
+        "Participation push default should be checked (on)"
+    )
+
+    assert 'data-type="participation" data-channel="telegram"' in html, (
+        "Participation telegram row should exist"
+    )
+    assert (
+        'data-type="participation" data-channel="telegram" checked' not in html
+    ), "Participation telegram default should NOT be checked (off)"
+