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[Bug?]: Yarn: 3.6.3 with Playwright CLI fails with EBADF: bad file descriptor, fstat error when used in Yarn PnP environments, preventing CLI-based test execution #7037
Description
Self-service
- I'd be willing to implement a fix
Describe the bug
Yarn 3.6.3 with Playwright CLI returns an EBADF: bad file descriptor, fstat error in Yarn PnP environments, blocking CLI test runs. Playwright reports it works as expected with Yarn v4.
Is this issue specific to Yarn 3.6.3 versus v4?
Issue submitted with playwright
To reproduce
Version
1.57.0 (also tested: 1.40.0, 1.30.0)
Steps to reproduce
Reproduction Steps
1. Create Yarn PnP Project
mkdir playwright-yarn-pnp-test
cd playwright-yarn-pnp-test
yarn init -y
echo "nodeLinker: pnp" > .yarnrc.yml2. Install Playwright
yarn add --dev @playwright/test playwright playwright-core3. Create Test File
// test.spec.js
const { test, expect } = require('@playwright/test');
test('basic test', async ({ page }) => {
await page.goto('https://example.com');
await expect(page).toHaveTitle(/Example/);
});4. Create Playwright Config
// playwright.config.js
module.exports = {
testDir: '.',
testMatch: ['**/*.spec.js']
};5. Run Test (Fails)
yarn playwright test
# Results in EBADF error6. Verify PnP Environment
ls .yarn/cache/ | grep playwright
### Expected behavior
## Expected Behavior
Playwright CLI should work with Yarn PnP environments, allowing test execution via:
```bash
yarn playwright testActual behavior
Actual Behavior
CLI fails with EBADF error when trying to read test files from Yarn PnP's virtual filesystem:
Error: EBADF: bad file descriptor, fstat
at tryStatSync (node:fs:392:25)
at readFileSync (node:fs:448:17)
at getSourceSync (node:internal/modules/esm/load:66:14)
at getSource (node:internal/modules/esm/translators:65:10)
at createCJSModuleWrap (node:internal/modules/esm/translators:181:32)
at ModuleLoader.commonjsStrategy (node:internal/modules/esm/translators:271:10)
at #translate (node:internal/modules/esm/loader:468:12)
at ModuleLoader.loadAndTranslate (node:internal/modules/esm/loader:515:27)
at async ModuleJob._link (node:internal/modules/esm/module_job:115:19) {
errno: -9,
code: 'EBADF',
syscall: 'fstat'
}
Additional context
Root Cause Analysis
The issue occurs because:
- Yarn PnP stores packages in zip archives (
.yarn/cache/*.zip) - Playwright CLI uses
fs.readFileSync()andfstatto read test files - Virtual file descriptors from zip archives cause
fstatto fail with EBADF
What We've Tested (All Failed)
| Solution | Result | Notes |
|---|---|---|
| Reinstall Playwright | ❌ Failed | Same EBADF error |
| Different Playwright versions | ❌ Failed | 1.57.0, 1.40.0 both fail |
| Clear Yarn cache | ❌ Failed | Fresh install doesn't help |
| Explicit config files | ❌ Failed | CLI still can't read files |
| Add missing dependencies | ❌ Failed | Fixed playwright-core but EBADF persists |
Environment
System:
OS: macOS 26.2
CPU: (10) arm64 Apple M1 Max
Memory: 485.47 MB / 32.00 GB
Binaries:
Node: 22.14.0 - ~/.nvm/versions/node/v22.14.0/bin/node
Yarn: 3.6.3 - /opt/homebrew/bin/yarn
npm: 10.9.2 - ~/.nvm/versions/node/v22.14.0/bin/npm
Languages:
Bash: 3.2.57 - /bin/bashEnvironment
System:
OS: macOS 26.2
CPU: (10) arm64 Apple M1 Max
Memory: 485.47 MB / 32.00 GB
Binaries:
Node: 22.14.0 - ~/.nvm/versions/node/v22.14.0/bin/node
Yarn: 3.6.3 - /opt/homebrew/bin/yarn
npm: 10.9.2 - ~/.nvm/versions/node/v22.14.0/bin/npm
Languages:
Bash: 3.2.57 - /bin/bashAdditional context
No response
Activity
clemyan commentedon Jan 20, 2026
Seems like it was fixed in #5961. Can you upgrade to at least 3.7.0 and try?
sachinnanne commentedon Jan 21, 2026
The EBADF issue is SOLVED by upgrading to Yarn 3.7.0+ but new error - buffer concatenation problems with image files.
Why: The rimraf cleanup process might be passing incorrect data types to Buffer.concat.
Buffer Concatenation Error in Yarn PnP 3.7.0
Trigger: File cleanup operations on PNG files and .last-run.json during test cleanup
Impact: Prevents successful completion of Playwright tests in Yarn PnP environments
But GOOD NEWS, when upgrading to
yarn v4.12.0everything is workingYARN V4 COMPLETELY FIXED THE ISSUES:
✅ No EBADF error - Completely resolved!
✅ No Buffer concatenation error - Completely resolved!
✅ Playwright CLI WORKING - Running tests across all browsers!