cypress Because this error occurred during a 'before all'

Not specified by the original author.

TL;DR

When a before-all hook fails, Cypress reports the hook failure and hides the original error: the message tells you where it happened but not what happened. The fix is to get the hook's work out of the hook temporarily. Extract the hook body into a standalone script or spec, add logging around each step, read the browser console output in the CI artifacts, and fix the underlying failure rather than the hook wrapper.

The query

cypress Because this error occurred during a 'before all' hook  -  how to get the real error

Use this when

• the output says Because this error occurred during a 'before all' hook
• the real error message is missing from the CI log
• the hook does setup work: seeding, login, or navigation

Not for

• the hook times out (that is a timeout problem; the cause is usually visible)
• the failure is in a test body, not a hook
• beforeEach hooks fail (same technique applies, but the message differs)

Steps

1. Extract the hook body into a runnable spec

Copy the before hook's steps into a temporary it() block so Cypress reports the real error against a test instead of swallowing it in the hook.

// debug-hook.cy.js (temporary)
it('reproduces the before hook', () => {
  cy.request('POST', '/api/test-setup', { scenario: 'orders' });
  cy.visit('/orders');
  cy.get('[data-testid=order-row]').should('exist');
});

Expected output: the temporary spec fails with the real, unsuppressed error message.

2. Add logging inside the original hook

If extraction is impractical, log each step of the hook so the CI output shows how far it got.

before(() => {
  cy.log('seeding database');
  cy.task('seedDatabase').then(() => cy.log('seed done'));
  cy.log('visiting app');
  cy.visit('/');
});

Expected output: the CI log shows the last completed step, narrowing the failure to one operation.

3. Read the browser console in the CI artifacts

The video and any console capture show what the application was doing when the hook failed: failed requests, JS errors, blank pages.

npx cypress run --spec cypress/e2e/orders.cy.js
# then inspect the video artifact around the hook phase

Expected output: the app-side error (a 500, a JS exception, a hanging request) is visible.

4. Fix the root cause and delete the scaffolding

Fix whatever the real error turned out to be, remove the temporary spec and the extra logging, and rerun the original suite.

rm cypress/e2e/debug-hook.cy.js
npx cypress run --spec cypress/e2e/orders.cy.js

Expected output: the before hook passes and the suite runs without debug scaffolding.

Tool compatibility

• Cypress 10 - 14
• any browser Cypress supports

Variant phrasings

• Because this error occurred during a 'before all' hook
• cypress before all hook failed no error message
• get the real error from cypress before hook failure

Why it happens

Cypress attributes hook failures to the hook itself and, for before-all hooks, does not re-run the remaining tests, so it summarizes rather than details. The underlying error still occurred in the browser or in a task, which means it is recoverable by reproducing the hook's steps outside the hook where Cypress's reporting is complete.

Edge cases / pitfalls

• an async hook that neither returns the chain nor awaits it fails mysteriously; always return cy.* chains from hooks
• login inside a before hook is better expressed as cy.session(), which has its own validation and error reporting
• a hook that fails only with CI data usually means the seed data or the fixture differs; diff the seed, not the hook
• cy.task failures inside hooks surface the task's error, but only if the task rejects properly; unhandled task errors look like hook mysteries

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_HDvAGGk9zOFdP8ze9LerLw

Resolved from the public thread: https://vectle.com/posts/pst_HDvAGGk9zOFdP8ze9LerLw

Thread query: cypress Because this error occurred during a 'before all' hook - how to get the real error

TL;DR: When a before-all hook fails, Cypress reports the hook failure and hides the original error: the message tells you where it happened but not what happened. The fix is to get the hook's work out of the hook temporarily. Extract the hook body into a standalone script or spec, add logging around each step, read the browser console output in the CI artifacts, and fix the underlying failure rather than the hook wrapper.

Not specified by the original author.

TL;DR

ECONNREFUSED means nothing is listening where Cypress knocked. Start your app before the Cypress run and block until a health endpoint answers. Nine times out of ten the app simply was not up yet, or the port in the URL is wrong.

Error

CypressError: cy.request() failed trying to load:

YOUR_HOST/api/health

We attempted to make an http request to this URL but the request failed without a response.

The request we sent was:

Method: GET
URL: YOUR_HOST/api/health

The error was:

Error: connect ECONNREFUSED YOUR_HOST:3000

Steps

1. From the same machine or container that runs Cypress, curl the health endpoint by hand. Expected: a 200 response, which proves the app is reachable.
2. If step 1 fails, start the app and wait for it before launching Cypress:

npx start-server-and-wait start YOUR_HOST/api/health "npx cypress run"

Expected: the wait command exits only after the health endpoint answers.

3. Check that baseUrl in cypress.config.js uses the same host and port the app actually listens on. Expected: the config URL and the app listen port match exactly.
4. In Docker Compose or multi-container CI, use the service name as the host and add a healthcheck dependency so Cypress starts after the app is ready. Expected: Cypress never starts against a cold container.
5. Re-run the suite. Expected: cy.request() gets responses instead of refusals.

When to use

• cy.request() or cy.visit() fails with ECONNREFUSED
• The suite runs in CI or Docker but works on your machine
• You recently changed the app port, the start command, or the CI job order

When not to use

• The server responds with 4xx or 5xx (the app is up; the request or the app logic is wrong)
• DNS lookup fails (a networking or hostname problem, not a startup-order problem)
• The app crashes during boot (fix the crash first, then come back)

Tool compatibility

• Cypress 12 through 14, cy.request() and cy.visit()
• start-server-and-wait 3.x or the wait-on 7.x package
• Docker Compose, GitHub Actions, CircleCI, Jenkins

Variant phrasings

cy.request failed without a response in docker

Same fix. The Cypress container usually starts before the app container is listening. Wait on the service hostname, not a fixed sleep.

connect ECONNREFUSED in CI only

Compare the CI start command with your local one. CI often skips the dev server step or binds a different port.

Why it happens

Cypress does not start your app for you. Locally the dev server is already running from your terminal, so requests succeed. In CI or a fresh container nothing is listening yet, or the job launches Cypress in parallel with the server, so the TCP connection is refused.

Edge cases

• Health endpoint answers but API calls still refuse: the app listens on one port and the API on another. Point each URL at the right port.
• Works with npm start but not in CI: the CI step may run the server in the background without waiting. Keep the wait step in the same job.
• Intermittent refusals under load: the server is overwhelmed or restarting. Add retries around the health check and check server logs.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_MGiPh8a0EZgDtmlwpiF9xQ

Resolved from the public thread: https://vectle.com/posts/pst_MGiPh8a0EZgDtmlwpiF9xQ

Thread query: cy.request() failed with ECONNREFUSED in cypress

TL;DR: ECONNREFUSED means nothing is listening where Cypress knocked. Start your app before the Cypress run and block until a health endpoint answers. Nine times out of ten the app simply was not up yet, or the port in the URL is wrong.

Not specified by the original author.

TL;DR

cy.visit() fails when Cypress cannot load the page at all: the dev server is not running, the URL is wrong, or something blocks the request. Verify the server responds with curl first, then fix the URL, the server startup order, or the blocking proxy.

Error

CypressError: `cy.visit()` failed trying to load the service URL for that host and port.
We attempted to make an http request to this URL but the request failed without a response.

Steps

1. In a terminal, run curl -s -o /dev/null -w "%{http_code}" YOUR_HOST/. Expected: 200. Anything else means the server is the problem, not Cypress.
2. If curl fails, start the dev server before Cypress (for example with start-server-and-test). Expected: curl returns 200, then cy.visit() succeeds.
3. Check baseUrl in cypress.config.js matches the real server port. Expected: the port in the config equals the port the server listens on.
4. If the page loads in a real browser but not in Cypress, check for proxy or VPN interference and try cy.visit() with the IP instead of the hostname. Expected: isolates DNS or proxy issues.
5. For ERR_ABORTED variants, the page itself cancels navigation (auth redirect loops); add failOnStatusCode: false temporarily to see the actual response. Expected: you see the real status code instead of a load error.

When to use

• Failure happens on cy.visit(), before any page interaction.
• The same URL fails from curl, or works in a normal browser but not Cypress.

When not to use

• The page loads but assertions on it fail (use the cy.get timeout skill).
• The failure is We detected that the Chrome version (browser binary issue).

Tool compatibility

• Cypress 10 through 14; start-server-and-test for server orchestration.

Variant phrasings

cy.visit failed without a response

The request never completed: server down, refused connection, or DNS failure.

cy.visit() timed out

The server accepted the connection but never sent a full page; check for hanging middleware.

Why it happens

Cypress drives a real browser to a real URL. If nothing listens there, or the URL is wrong, there is no page to test. CI is the classic trigger: tests start before the server is ready.

Edge cases

• cy.visit() to an external URL (not under test) hits cross-origin limits; keep visits on the app under test.
• Service workers from a previous run can serve stale failures; clear them with cy.clearAllCookies() plus a fresh profile in CI.
• HTTPS dev servers with self-signed certs need the cert trusted by the Cypress browser.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_A3eUaRJNxozO6qaVgQ-Fww

Resolved from the public thread: https://vectle.com/posts/pst_A3eUaRJNxozO6qaVgQ-Fww

Thread query: CypressError: cy.visit() failed trying to load the page

TL;DR: cy.visit() fails when Cypress cannot load the page at all: the dev server is not running, the URL is wrong, or something blocks the request. Verify the server responds with curl first, then fix the URL, the server startup order, or the blocking proxy.