(bug) screenshots are differents between local CI

[tonai]

Describe the bug I got 3 tests that are fine when they ran locally, but when I push to CI (using CircleCI) all my tests fail.

In fact They are ok with default threshold, but they are ko when I use:

    cy.document().toMatchImageSnapshot({
      imageConfig: {
        threshold: 0.001,
        thresholdType: 'percent'
      }
    });

To Reproduce Here is the repo: https://github.com/tonai/react-deploy

Expected behavior I would like my tests to pass on CI environment.

Desktop

• OS: Ubuntu 18.04
• Cypress Version 5.2

CI seems to run on Debian 10.5

Additional context Electron version is the same in both environment.

When running cypress locally I got following informations:

  ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
  │ Cypress:      5.2.0                                                                            │
  │ Browser:      Electron 83 (headless)                                                           │
  │ Specs:        2 found (e2e.js, ui.js)                                                          │
  │ Experiments:  experimentalFetchPolyfill=true                                                   │
  └────────────────────────────────────────────────────────────────────────────────────────────────┘

And on CI I have following informations:

  ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
  │ Cypress:      5.2.0                                                                            │
  │ Browser:      Electron 83 (headless)                                                           │
  │ Specs:        2 found (e2e.js, ui.js)                                                          │
  │ Params:       Tag: false, Group: false, Parallel: false                                        │
  │ Run URL:      https://dashboard.cypress.io/projects/49dchw/runs/8                              │
  │ Experiments:  experimentalFetchPolyfill=true                                                   │
  └────────────────────────────────────────────────────────────────────────────────────────────────┘

[tonai]

Ok I tried to generate the screenshots locally with Debian 10 and it finally works.