diff --git a/src/lib/constants.ts b/src/lib/constants.ts
index 9a83ddba..f9b48755 100644
--- a/src/lib/constants.ts
+++ b/src/lib/constants.ts
@@ -11,5 +11,6 @@ export const TID = {
 
 export const C = {
   aiLiveEditor: 'ai_live_editor',
+  editorChooserDismissedKey: 'mermaid-editor-chooser-dismissed',
   utmSource: 'mermaid_live_editor'
 } as const;
diff --git a/src/lib/util/migration/domainMigration.ts b/src/lib/util/migration/domainMigration.ts
index dc9dc805..17fd8cd3 100644
--- a/src/lib/util/migration/domainMigration.ts
+++ b/src/lib/util/migration/domainMigration.ts
@@ -1,3 +1,4 @@
+import { C } from '$/constants';
 import { env } from '$/util/env';
 
 const mermaidAiDomain = 'mermaid.ai';
@@ -41,15 +42,13 @@ const hasPakoData = (): boolean => {
   );
 };
 
-const editorChooserStorageKey = 'mermaid-editor-chooser-dismissed';
-
 /**
  * Check if the editor chooser modal should be shown.
  * Shows for new users who haven't dismissed it and aren't viewing a shared link.
  */
 export const shouldShowEditorChooser = (): boolean => {
   if (!env.isEnabledMermaidChartLinks) return false;
-  if (window.localStorage.getItem(editorChooserStorageKey) === 'true') return false;
+  if (window.localStorage.getItem(C.editorChooserDismissedKey) === 'true') return false;
   if (hasStoredUserData()) return false;
   if (hasPakoData()) return false;
   return true;
@@ -59,5 +58,5 @@ export const shouldShowEditorChooser = (): boolean => {
  * Dismiss the editor chooser modal permanently
  */
 export const dismissEditorChooser = (): void => {
-  window.localStorage.setItem(editorChooserStorageKey, 'true');
+  window.localStorage.setItem(C.editorChooserDismissedKey, 'true');
 };
diff --git a/tests/test.ts b/tests/test.ts
index bc551202..2d49438d 100644
--- a/tests/test.ts
+++ b/tests/test.ts
@@ -1,4 +1,4 @@
-import { TID } from '$/constants';
+import { C, TID } from '$/constants';
 import { test as base, expect, type Locator, type Page } from '@playwright/test';
 import { verifyFileSizeGreaterThan, type EditorOptions } from './utils';
 
@@ -115,6 +115,10 @@ export class EditorPage {
 
 export const test = base.extend<{ editPage: EditorPage }>({
   editPage: async ({ page }, use) => {
+    // Dismiss the editor chooser modal so it doesn't block interactions
+    await page.addInitScript((key) => {
+      window.localStorage.setItem(key, 'true');
+    }, C.editorChooserDismissedKey);
     const editorPage = new EditorPage(page);
     await editorPage.start();
     await editorPage.toggleSampleDiagrams();