diff --git a/src/main.js b/src/main.js
index b53970e..b8a26f4 100644
--- a/src/main.js
+++ b/src/main.js
@@ -166,7 +166,6 @@ function savePreferences() {
         connection: ui.connectionSection.open,
         connectionAdvanced: ui.connectionAdvanced.open,
         display: ui.displaySection.open,
-        displayAdvanced: ui.displayAdvanced.open,
         debug: ui.debugSection.open
       }
     }
diff --git a/tests/main-ui-state.test.mjs b/tests/main-ui-state.test.mjs
new file mode 100644
index 0000000..f2fb6d3
--- /dev/null
+++ b/tests/main-ui-state.test.mjs
@@ -0,0 +1,9 @@
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import test from 'node:test';
+
+test('main UI persistence does not reference the removed Display advanced panel', () => {
+  const source = readFileSync(new URL('../src/main.js', import.meta.url), 'utf8');
+  assert.doesNotMatch(source, /ui\.displayAdvanced/);
+  assert.doesNotMatch(source, /displayAdvanced:\s*ui\.displayAdvanced/);
+});