Waiting arbitrary time for the checks to work

Related: #22, vercel/next.js#7945

Full repo: here (note: some of the packages there are not yet published, but the test can run without them)

I have a simple test:

import formatAxeLog from "../helpers/formatAxeLog";

describe("Home page", () => {
  beforeEach(() => {
    cy.visit("/");
  });
  it("Has no detectable a11y violations on load", () => {
    cy.injectAxe();
    // cy.wait(500);
    cy.checkA11y(null, null, formatAxeLog);
  });
});

When I run the tests multiple times they sometimes fail (due to vercel/next.js#7945, as they should), sometimes pass. The only "reliable" way is just to wait. Am I doing something wrong, or this is a bug?

Start with the Cypress test shown in the issue and compare its intermittent results with the related #22 and vercel/next.js#7945 reports. Determine whether the failure is caused by page readiness or the linked Next.js behavior; done means the check has a reliable, justified synchronization strategy rather than an arbitrary wait.