diff --git a/third-party/devtools-tests/e2e/lighthouse/navigation_test.ts b/third-party/devtools-tests/e2e/lighthouse/navigation_test.ts
index aff7293db901..177c0a5bfc87 100644
--- a/third-party/devtools-tests/e2e/lighthouse/navigation_test.ts
+++ b/third-party/devtools-tests/e2e/lighthouse/navigation_test.ts
@@ -13,7 +13,6 @@ import {
   waitFor,
   waitForElementWithTextContent,
 } from '../../shared/helper.js';
-
 import {
   clickStartButton,
   getAuditsBreakdown,
diff --git a/third-party/devtools-tests/e2e/lighthouse/start-view_test.ts b/third-party/devtools-tests/e2e/lighthouse/start-view_test.ts
index 6b30fd3aaec3..5fcc52358abd 100644
--- a/third-party/devtools-tests/e2e/lighthouse/start-view_test.ts
+++ b/third-party/devtools-tests/e2e/lighthouse/start-view_test.ts
@@ -5,13 +5,13 @@
 import {assert} from 'chai';
 
 import {goTo, goToResource, waitFor} from '../../shared/helper.js';
-
 import {
   clearSiteData,
   getHelpText,
   isGenerateReportButtonDisabled,
   navigateToLighthouseTab,
   selectCategories,
+  selectMode,
   waitForStorageUsage,
 } from '../helpers/lighthouse-helpers.js';
 
@@ -47,7 +47,7 @@ describe('The Lighthouse start view', () => {
     assert.strictEqual(helpText, '');
   });
 
-  it('disables the start button for internal pages', async () => {
+  it('disables the start button for internal pages in navigation mode', async () => {
     await navigateToLighthouseTab();
     await goTo('about:blank');
 
@@ -57,6 +57,17 @@ describe('The Lighthouse start view', () => {
     assert.strictEqual(helpText, 'Can only audit pages on HTTP or HTTPS. Navigate to a different page.');
   });
 
+  it('disables the start button for internal pages in non-navigation mode', async () => {
+    await navigateToLighthouseTab();
+    await goTo('about:blank');
+    await selectMode('timespan');
+
+    const disabled = await isGenerateReportButtonDisabled();
+    const helpText = await getHelpText();
+    assert.isFalse(disabled, 'The Generate Report button should be enabled');
+    assert.strictEqual(helpText, '');
+  });
+
   // Broken on non-debug runs
   it.skip('[crbug.com/1057948] shows generate report button even when navigating to an unreachable page', async () => {
     await navigateToLighthouseTab('empty.html');