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Cypress v4.0.2stable Released Feb 14, 2020
Impact Score: 5/10

Cypress v4.0.2 — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

Component: cypress · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes
📄 .MD
⚡ Improvements 2 🔧 Bug Fixes 4
⚡ Executive Summary (TL;DR)

Cypress v4.0.2. Source highlight: *Released 2/14/2020*

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Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

⚡ Performance & Enhancements (2)

  • Improved the error experience GUI when launching a browser fails. Addresses #6432.
  • Improved the error experience when visiting the Cypress server outside of a Cypress-launched browser. Addresses #6435.

🔧 Bug Fixes & Patches (4)

  • Fixed a bug where Firefox tests could fail to run on macOS if another instance of Firefox was open. Addresses #6380.
  • Fixed a bug where re-running a failed workflow in GitHub Actions would not generate a new Dashboard run. Addresses #6450.
  • Fixed incorrect type definitions for `Cypress.isBrowser`. Addresses #6447.
  • Fixed a regression introduced in 4.0.0 where using `.should('contain', ...)` on a `cy.contains()` would produce unexpected results. Addresses #6384.
📄 View Raw Release Notes (Original Developer Log)
*Released 2/14/2020* **Bugfixes:** - Fixed a bug where Firefox tests could fail to run on macOS if another instance of Firefox was open. Addresses [#6380](https://github.com/cypress-io/cypress/issues/6380). - Updated `@cypress/browserify-preprocessor` to `2.1.4`, fixing a regression involving non-top-level `require()`s in tests. Addresses [#6403](https://github.com/cypress-io/cypress/issues/6403). - Fixed a bug where re-running a failed workflow in GitHub Actions would not generate a new Dashboard run. Addresses [#6450](https://github.com/cypress-io/cypress/issues/6450). - Fixed incorrect type definitions for `Cypress.isBrowser`. Addresses [#6447](https://github.com/cypress-io/cypress/issues/6447). - Fixed a regression introduced in 4.0.0 where using `.should('contain', ...)` on a `cy.contains()` would produce unexpected results. Addresses [#6384](https://github.com/cypress-io/cypress/issues/6384). **Misc:** - Improved the error experience GUI when launching a browser fails. Addresses [#6432](https://github.com/cypress-io/cypress/issues/6432). - Improved the error experience when visiting the Cypress server outside of a Cypress-launched browser. Addresses [#6435](https://github.com/cypress-io/cypress/issues/6435).
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