Diffy automatically detects visual changes in your website by comparing screenshots between environments. Catch regressions before they reach production.https://diffy.website/https://diffy.website/blog/7-must-use-wordpress-plugins-for-business-websites/https://diffy.website/blog/7-must-use-wordpress-plugins-for-business-websites/Seven WordPress plugins for business websites — WooCommerce, WPForms, All in One SEO, Optimole and more — and what each one actually does for you.Wed, 10 Mar 2021 00:00:00 GMThttps://diffy.website/blog/ai-check-screenshot-quality/https://diffy.website/blog/ai-check-screenshot-quality/Diffy's AI check catches cookie banners, CDN challenge pages, unloaded media and broken layouts before they turn into false positives in your results.Fri, 14 Aug 2026 00:00:00 GMThttps://diffy.website/blog/ai-diff-summary/https://diffy.website/blog/ai-diff-summary/Diffy's AI Summary reads every changed screenshot in a comparison and writes one plain-English brief, split into Critical and Minor. Available on request.Sat, 22 Aug 2026 00:00:00 GMThttps://diffy.website/blog/automation-testing/https://diffy.website/blog/automation-testing/What automation testing is, when it beats manual testing, the main types of automated tests, and how to choose the right tool for your project.Wed, 27 Jul 2022 00:00:00 GMThttps://diffy.website/blog/compatibility-testing/https://diffy.website/blog/compatibility-testing/Compatibility testing explained: the main types, worked examples, and the tools we recommend for checking your site across browsers and devices.Tue, 17 May 2022 00:00:00 GMThttps://diffy.website/blog/comprehensive-guide-non-functional-testing-types-examples-tools/https://diffy.website/blog/comprehensive-guide-non-functional-testing-types-examples-tools/Non-functional testing explained: load, volume, security, scalability and more, with examples and the tools we recommend for each type.Tue, 22 Mar 2022 00:00:00 GMThttps://diffy.website/blog/drupal-design-systems/https://diffy.website/blog/drupal-design-systems/How to bring a design system into your Drupal theme, comparing Storybook, Emulsify, UI Suite, Wingsuit and ready-made component libraries.Tue, 07 Mar 2023 00:00:00 GMThttps://diffy.website/blog/freeze-gif-inside-svg/https://diffy.website/blog/freeze-gif-inside-svg/You can embed an animated GIF inside an SVG, which makes freezing the animation tricky. Here is the JavaScript snippet we use to stop it.Fri, 13 Oct 2023 00:00:00 GMThttps://diffy.website/blog/functional-testing-types/https://diffy.website/blog/functional-testing-types/Functional testing explained: unit, integration, system and acceptance testing, with objectives, examples and recommended tools for each type.Fri, 15 Apr 2022 00:00:00 GMThttps://diffy.website/blog/functional-vs-non-functional-testing/https://diffy.website/blog/functional-vs-non-functional-testing/Functional vs non-functional testing compared: what each one measures, when you need it, and the tools we recommend for both kinds of testing.Wed, 13 Apr 2022 00:00:00 GMThttps://diffy.website/blog/github-pantheon-workflow/https://diffy.website/blog/github-pantheon-workflow/Deploy to Pantheon from GitHub Actions only, so every release is tracked in your repo, with visual regression testing run on each pull request.Mon, 26 Feb 2024 00:00:00 GMThttps://diffy.website/blog/hide-page-for-visual-regression-testing-drupal-ip-address/https://diffy.website/blog/hide-page-for-visual-regression-testing-drupal-ip-address/Build a Drupal style guide page combining all your UI elements, then restrict it by IP address so only your visual testing tool can reach it.Thu, 11 Jul 2024 00:00:00 GMThttps://diffy.website/blog/how-avoid-false-positives-when-doing-visual-testing/https://diffy.website/blog/how-avoid-false-positives-when-doing-visual-testing/False positives are the biggest pain in visual regression testing. Here is how to handle dynamic content using CSS selectors and content fixtures.Wed, 26 Feb 2020 00:00:00 GMThttps://diffy.website/blog/non-functional-testing-types/https://diffy.website/blog/non-functional-testing-types/The main non-functional testing types — load, stress, volume, scalability, failover, compatibility and usability — with examples and tools.Thu, 21 Apr 2022 00:00:00 GMThttps://diffy.website/blog/qa-testing-web-development-statistics/https://diffy.website/blog/qa-testing-web-development-statistics/25 web development and QA testing statistics on bugs, automation and design, with sources, to help you benchmark your own testing process.Sun, 13 Nov 2022 00:00:00 GMThttps://diffy.website/blog/regression-testing-step-by-step-action-plan/https://diffy.website/blog/regression-testing-step-by-step-action-plan/A step-by-step regression testing plan for a website you did not build, including how to prioritise tests, plus two real-world worked examples.Wed, 24 Aug 2022 00:00:00 GMThttps://diffy.website/blog/shadow-dom-with-jquery/https://diffy.website/blog/shadow-dom-with-jquery/How to reach elements inside shadow DOM with jQuery, so you can open menus and search boxes before taking visual regression screenshots.Thu, 17 Aug 2023 00:00:00 GMThttps://diffy.website/blog/stabilize-elementor-website-visual-regression-testing/https://diffy.website/blog/stabilize-elementor-website-visual-regression-testing/Elementor sliders, countdowns and Lottie animations cause false positives. Here are the JavaScript snippets that stabilise each widget type.Fri, 21 Feb 2025 00:00:00 GMThttps://diffy.website/blog/stanford-webcamp-best-of-both-worlds/https://diffy.website/blog/stanford-webcamp-best-of-both-worlds/Visual regression testing sits between manual QA and automated tests. When it makes sense, what to test, and why good screenshots are hard.Thu, 07 May 2026 00:00:00 GMThttps://diffy.website/blog/testing-tabs-mobile-menu-sliders-screenshots/https://diffy.website/blog/testing-tabs-mobile-menu-sliders-screenshots/How to capture screenshots of tabs, mobile menus and sliders by running click actions on the page before each screenshot is taken.Thu, 22 Oct 2020 00:00:00 GMThttps://diffy.website/blog/top-website-visual-regressions-spot-automated-testing/https://diffy.website/blog/top-website-visual-regressions-spot-automated-testing/The visual bugs you can catch by eye and the ones you cannot, based on the regressions we see most often across the sites Diffy tests daily.Fri, 12 Aug 2022 00:00:00 GMThttps://diffy.website/blog/two-ways-to-use-baseline-set-screenshots/https://diffy.website/blog/two-ways-to-use-baseline-set-screenshots/Two ways to use a baseline set of screenshots in visual regression testing: ongoing site monitoring, and faster pull request reviews.Mon, 09 Oct 2023 00:00:00 GMThttps://diffy.website/blog/types-of-performance-testing/https://diffy.website/blog/types-of-performance-testing/Performance testing types explained: load, stress, volume and scalability testing, how long each one takes, and the tools we recommend.Tue, 17 May 2022 00:00:00 GMThttps://diffy.website/blog/visual-regression-testing-with-claude-code/https://diffy.website/blog/visual-regression-testing-with-claude-code/The Diffy plugin adds ten visual regression testing skills to Claude Code, so the agent that changed your CSS can also show you what it changed on the page.Mon, 17 Aug 2026 00:00:00 GMThttps://diffy.website/blog/visual-testing-patternlab-drupal/https://diffy.website/blog/visual-testing-patternlab-drupal/How to run visual regression testing against a Patternlab component library in Drupal and catch regressions across every component at once.Tue, 18 Feb 2020 00:00:00 GMThttps://diffy.website/blog/what-kind-of-things-break-during-wordpress-or-drupal-updates/https://diffy.website/blog/what-kind-of-things-break-during-wordpress-or-drupal-updates/What typically breaks during WordPress and Drupal updates, how to spot it before your visitors do, and how to fix a broken update quickly.Thu, 10 Dec 2020 00:00:00 GMThttps://diffy.website/blog/what-user-acceptance-testing-how-planned-executed/https://diffy.website/blog/what-user-acceptance-testing-how-planned-executed/User acceptance testing explained: prerequisites, a full UAT checklist, how to plan it, and how to identify test scenarios and prepare test data.Wed, 01 Jun 2022 00:00:00 GMT