diff --git a/packages/playwright-core/src/server/injected/roleUtils.ts b/packages/playwright-core/src/server/injected/roleUtils.ts
index 50564fa31f..25035b6998 100644
--- a/packages/playwright-core/src/server/injected/roleUtils.ts
+++ b/packages/playwright-core/src/server/injected/roleUtils.ts
@@ -383,7 +383,11 @@ export function getAriaLabelledByElements(element: Element): Element[] | null {
   const ref = element.getAttribute('aria-labelledby');
   if (ref === null)
     return null;
-  return getIdRefs(element, ref);
+  const refs = getIdRefs(element, ref);
+  // step 2b:
+  // "if the current node has an aria-labelledby attribute that contains at least one valid IDREF"
+  // Therefore, if none of the refs match an element, we consider aria-labelledby to be missing.
+  return refs.length ? refs : null;
 }
 
 function allowsNameFromContent(role: string, targetDescendant: boolean) {
diff --git a/packages/playwright-core/src/server/launchApp.ts b/packages/playwright-core/src/server/launchApp.ts
index 3d119f9d46..d8c81a3169 100644
--- a/packages/playwright-core/src/server/launchApp.ts
+++ b/packages/playwright-core/src/server/launchApp.ts
@@ -43,12 +43,12 @@ export async function launchApp(browserType: BrowserType, options: {
   }
 
   const context = await browserType.launchPersistentContext(serverSideCallMetadata(), '', {
-    channel: !options.persistentContextOptions?.executablePath ? findChromiumChannel(options.sdkLanguage) : undefined,
-    noDefaultViewport: true,
     ignoreDefaultArgs: ['--enable-automation'],
-    colorScheme: 'no-override',
-    acceptDownloads: isUnderTest() ? 'accept' : 'internal-browser-default',
     ...options?.persistentContextOptions,
+    channel: options.persistentContextOptions?.channel ?? (!options.persistentContextOptions?.executablePath ? findChromiumChannel(options.sdkLanguage) : undefined),
+    noDefaultViewport: options.persistentContextOptions?.noDefaultViewport ?? true,
+    acceptDownloads: options?.persistentContextOptions?.acceptDownloads ?? (isUnderTest() ? 'accept' : 'internal-browser-default'),
+    colorScheme: options?.persistentContextOptions?.colorScheme ?? 'no-override',
     args,
   });
   const [page] = context.pages();
diff --git a/tests/library/role-utils.spec.ts b/tests/library/role-utils.spec.ts
index a02680ce86..2b5792d0f1 100644
--- a/tests/library/role-utils.spec.ts
+++ b/tests/library/role-utils.spec.ts
@@ -495,6 +495,16 @@ test('should not include hidden pseudo into accessible name', async ({ page }) =
   expect.soft(await getNameAndRole(page, 'a')).toEqual({ role: 'link', name: 'hello hello' });
 });
 
+test('should ignore invalid aria-labelledby', async ({ page }) => {
+  await page.setContent(`
+    <label>
+      <span>Text here</span>
+      <input type=text aria-labelledby="does-not-exist">
+    </label>
+  `);
+  expect.soft(await getNameAndRole(page, 'input')).toEqual({ role: 'textbox', name: 'Text here' });
+});
+
 function toArray(x: any): any[] {
   return Array.isArray(x) ? x : [x];
 }
diff --git a/utils/build/build.js b/utils/build/build.js
index ac18a2cde6..b67b36aee3 100644
--- a/utils/build/build.js
+++ b/utils/build/build.js
@@ -301,7 +301,7 @@ if (watchMode) {
     args: [
       'vite', '--config', 'vite.sw.config.ts',
       'build', '--watch', '--minify=false',
-      '--outDir', path.join(__dirname, '..', '..', 'packages', 'playwright-core', 'lib', 'vite', 'trace-viewer'),
+      '--outDir', path.join(__dirname, '..', '..', 'packages', 'playwright-core', 'lib', 'vite', 'traceViewer'),
       '--emptyOutDir=false'
     ],
     shell: true,