Plugin
Updated
MainWP Regression Testing
MainWP Regression Testing is an extension for the MainWP dashboard, made by MainWP. It captures screenshots of your WordPress sites before and after updates, then compares them so you can spot layout or design changes without checking every page by hand.
- Version
- 5.2.1
- Released
- Jul 23, 2026
- Developer
- MainWP
- Type
- WordPress plugin
- Requires
- MainWP
- Licence
- GPL
- Included in
- Every plan, or $4.79 a year on its own
What’s new in MainWP Regression Testing 5.2.1
Version 5.2.1 · Jul 23, 2026
Latest
- ImprovedImproved internal notification scheduling and email handling infrastructure to enhance maintainability.
- ImprovedImproved performance by bulk-loading snapshot data for dashboard and result checks.
- ImprovedRefreshed accessible-sites cache after site add/remove and improved dashboard rendering behavior.
What it does
Plugin, theme and core updates sometimes change how a site looks in ways nobody notices right away. A shifted header, a broken layout or a missing section can sit unnoticed until a visitor or client points it out. When you manage many sites, opening each one after every update to look for problems takes a lot of time. This extension handles that check for you by taking screenshots before an update runs and again afterward, then comparing the two versions to show what changed.
The extension works inside the MainWP dashboard, so you need MainWP to use it. From that single control center you can run regression tests across all the sites you manage. Comparisons appear side by side with differences highlighted, and you can schedule tests to run after updates. Screenshot resolution and comparison sensitivity are adjustable to suit each site's layout, and reports and notifications let you know when something looks different so you can review it and fix it.
Best for
- Agencies managing many client sites through MainWP
- Freelancers who handle regular WordPress maintenance and updates
- Webmasters who want visual checks after plugin or theme updates
Features
Before-and-after screenshots
The extension automatically captures screenshots of your sites before and after updates, giving you a visual record to compare when plugins, themes or WordPress core change.
Highlighted visual differences
Side-by-side comparisons mark the areas that changed between screenshots, so you can find discrepancies quickly instead of scanning whole pages yourself.
Runs from the MainWP dashboard
Regression testing for all your connected WordPress sites is managed from the MainWP dashboard, keeping it in the same place where you already handle updates.
Scheduled testing
You can set tests to run automatically after updates, which reduces the number of manual post-update checks you need to do on each site.
Adjustable resolution and sensitivity
Screenshot resolution and comparison sensitivity can be customized, letting you tune the checks to match each site's design and avoid flagging changes you do not care about.
Reports and notifications
Detailed reports and notifications tell you when the extension detects visual changes, so you can review the affected site and respond quickly.
Works with varied sites
The extension is designed to work across a variety of WordPress themes and plugins, which suits agencies managing many different kinds of projects.
MainWP Regression Testing older versions
- 5.2May 272 new, 3 improvements, 1 fix
- 5.1.4Jan 231 improvement, 2 fixes
- 5.1.3Jan 212 new, 4 improvements
- 5.1.2Dec 3, 2025
- 5.1Jul 4, 2025
- 5.0Mar 29, 2025
Members and buyers of this product can download older versions.
Questions about MainWP Regression Testing
Do I need MainWP to use this extension?
Yes. MainWP Regression Testing is an extension for the MainWP dashboard and requires MainWP. You run and manage your regression tests for connected sites from within that dashboard.
How does it show me what changed after an update?
It takes screenshots of a site before and after an update and compares them. The results appear side by side with the differences highlighted, so you can see which parts of the page shifted or changed.
Can I control how sensitive the comparisons are?
Yes. You can adjust the comparison sensitivity as well as the screenshot resolution. This helps you fit the testing to each site's design so minor variations do not create unnecessary alerts.
Will I be told when a problem is found?
The extension provides reports and notifications when it detects visual changes. You can then open the comparison, review what changed and decide whether the site needs a fix.
Is MainWP Regression Testing free?
The code of MainWP Regression Testing is licensed under the GPL, so anyone may use, change and share it. GPL Feast is a paid service: a plan or a single purchase gives you the download and automatic updates. The developer's own support, licence key and online services are not included.
Which version of MainWP Regression Testing is this?
Version 5.2.1, released Jul 23, 2026. New versions appear here when the developer publishes them, and members get them as automatic updates.
How do I update MainWP Regression Testing?
Install the free GPL Feast Updater on your site and connect it with your API key. It installs new versions of MainWP Regression Testing automatically and keeps a backup, so you can roll back.
What does MainWP Regression Testing need?
MainWP Regression Testing needs MainWP installed and active.
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