Playwright test with file uploading says : Target is closed

Question

I have a playwright test that consists in uploading a file. The test passes under my local environment (Windows, Playwright 1.35.1 with up-to-date deps) on both projects (Chromium and Firefox)
Although, when launching the test on Gitlab CI, it passes for Chromium but fails for Firefox with the message "frame.setInputFiles: Target closed".
The CI job is using debian:11.7-slim docker image, and similarly, playwright 1.35.1 with up-to-date browsers and deps.

I tried the headless mode locally and the test still passes. I also tried the fileChooser way on CI and it doesn't make it any better.

I managed to make a code snippet to repro the error.

import { test, expect } from '@playwright/test';

test('test', async ({ page }) => {
  await page.goto('https://www.file.io/');
  await page.getByText('Upload Files').click();
  const fileInputElement = page.locator('#upload-button');
  await fileInputElement.setInputFiles('dummy.pdf');
});

Something I noticed, though: when launching the test locally (both in headless and headful mode):
On Chromium, the file browsing window doesn't even show up but the file uploads. On Firefox, the file browsing window shows up, and doesn't disappear even after the file upload. It takes at least 10 seconds to disappear (the browser window has already disappeared at that point).

Thank you.

UPDATE: I updated Playwright to the latest release (1.43.1) and the problem persists.

Answer 1

I solved the issue. Not ideal, but by adding test.use({headless: false}); specifically in the test above, it now passes on CI.