diff --git a/crates/ui-egui/tests/system_theme.rs b/crates/ui-egui/tests/system_theme.rs
index 73a4f19..e6b0542 100644
--- a/crates/ui-egui/tests/system_theme.rs
+++ b/crates/ui-egui/tests/system_theme.rs
@@ -181,7 +181,10 @@ fn title_bar_switch_and_file_menu_choose_the_theme() {
     // File opens Backstage; its Options page holds the Office Theme choice (#331).
     h.get_by_label("File").click();
     h.run_steps(3);
-    h.get_by_label("Options").click();
+    h.get_by_role_and_label(egui::accesskit::Role::Button, "Options").click();
+    h.run_steps(3);
+    // The first combo box on the page is Display theme.
+    h.get_all_by_role(egui::accesskit::Role::ComboBox).next().expect("theme combo").click();
     h.run_steps(3);
     h.get_by_label("System").click();
     h.run_steps(3);