{"id":42998,"date":"2023-04-12T15:00:06","date_gmt":"2023-04-12T13:00:06","guid":{"rendered":"https:\/\/qodeinteractive.com\/magazine\/?p=42998"},"modified":"2023-04-05T14:14:40","modified_gmt":"2023-04-05T12:14:40","slug":"best-visual-regression-testing-tools-wordpress","status":"publish","type":"post","link":"https:\/\/qodeinteractive.com\/magazine\/best-visual-regression-testing-tools-wordpress\/","title":{"rendered":"Top 5 Visual Regression Testing Tools for WordPress"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text]The importance of a good website UX cannot be stressed enough. Regardless of the size and scope of the website &#8211; whether it\u2019s a simple blog, a creative portfolio or a business website &#8211; your visitors must enjoy a smooth and streamlined experience. To assure that, all design elements and functionalities on your website need to work properly and to be in sync with each other. There are many ways to check for this, and today we want to talk about visual regression testing tools for WordPress.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]First, let\u2019s see what visual regression testing (VTR) tools are and why you may want to use one.<br \/>\n[\/vc_column_text][vc_empty_space height=&#8221;80px&#8221;][vc_widget_sidebar sidebar_id=&#8221;new-top-picks-banner&#8221;][vc_empty_space height=&#8221;80px&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h2 class=\"qodef-h4\">What Is Visual Regression Testing and Why Do You Need It?<\/h2>\n<p>[\/vc_column_text][vc_column_text]In short, visual regression testing is a method that reveals changes in your design, or in your frontend in general, that you may want to fix. <strong>It identifies changes, various bugs and potential issues<\/strong> that would otherwise remain undiscovered by general testing tools because they\u2019re either too small or too subtle, or are otherwise capable of escaping these tests.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]In most cases, visual regression testing works by <strong>capturing a sequence of screenshots of your frontend during a thorough scan<\/strong>. After the initial sequence, the tool then performs additional scans and also takes images which are then <strong>compared to the initial ones<\/strong> in order to detect changes or bugs.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]Some of the issues you can catch this way include misalignments of page sections and other design elements (e.g. a menu that, when opened, covers the title area so that parts of it are hidden), mistakes in responsive design (i.e. elements that don\u2019t work well on smaller screens), improper content loading, failed API integrations, as well as any larger issues that occur due to updates.<br \/>\n[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]Speaking of updates, they are the main reason you may want to conduct visual regression testing. After <a href=\"https:\/\/qodeinteractive.com\/magazine\/how-to-update-a-wordpress-theme-without-losing-customization\/\">updating your theme<\/a>, <a href=\"https:\/\/qodeinteractive.com\/magazine\/how-to-update-plugins\/\">your plugins<\/a> or core files, there\u2019s always a risk of losing some important element of your site or, simply put, of breaking it. A <a href=\"https:\/\/qodeinteractive.com\/magazine\/wordpress-update\/\">WordPress update<\/a> can also cause certain issues, especially if you haven\u2019t properly <a href=\"https:\/\/qodeinteractive.com\/magazine\/wordpress-backup-with-updraftplus-plugin\/\">backed up your website<\/a>. One way to detect this is by manually going through all your pages, but that\u2019s simply not convenient enough. By using VTR tools, this process is automated and also much more reliable.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]Now that we understand the importance of VTR, let\u2019s check out some of the best visual regression testing tools for your WordPress website:<br \/>\n[\/vc_column_text][vc_empty_space height=&#8221;22px&#8221;]<ul class=\"qodef-unordered-list-item qodef-toc\">\n    <li>\n\t        <div class=\"qodef-ul-title-holder\">\n            <span class=\"qodef-ul-title-content\"><a href=\"#wraith\">Wraith<\/a><\/span>        <\/div>\n            <\/li>\n<\/ul>[vc_empty_space height=&#8221;5px&#8221;]<ul class=\"qodef-unordered-list-item qodef-toc\">\n    <li>\n\t        <div class=\"qodef-ul-title-holder\">\n            <span class=\"qodef-ul-title-content\"><a href=\"#backstopjs\">BackstopJS<\/a><\/span>        <\/div>\n            <\/li>\n<\/ul>[vc_empty_space height=&#8221;5px&#8221;]<ul class=\"qodef-unordered-list-item qodef-toc\">\n    <li>\n\t        <div class=\"qodef-ul-title-holder\">\n            <span class=\"qodef-ul-title-content\"><a href=\"#percy\">Percy<\/a><\/span>        <\/div>\n            <\/li>\n<\/ul>[vc_empty_space height=&#8221;5px&#8221;]<ul class=\"qodef-unordered-list-item qodef-toc\">\n    <li>\n\t        <div class=\"qodef-ul-title-holder\">\n            <span class=\"qodef-ul-title-content\"><a href=\"#visual-regression-tests\">VRTs &#8211; Visual Regression Tests<\/a><\/span>        <\/div>\n            <\/li>\n<\/ul>[vc_empty_space height=&#8221;5px&#8221;]<ul class=\"qodef-unordered-list-item qodef-toc\">\n    <li>\n\t        <div class=\"qodef-ul-title-holder\">\n            <span class=\"qodef-ul-title-content\"><a href=\"#screenster\">Screenster<\/a><\/span>        <\/div>\n            <\/li>\n<\/ul>[vc_empty_space height=&#8221;68px&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h2 class=\"qodef-h4\"><a id=\"wraith\"><\/a>Wraith<\/h2>\n<p>[\/vc_column_text][vc_empty_space height=&#8221;21px&#8221;]<div class=\"qodef-single-image-holder   qodef-has-border \">\n    <div class=\"qodef-si-inner\" >\n                                    <img loading=\"lazy\" decoding=\"async\" width=\"969\" height=\"518\" src=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Wraith.jpg\" class=\"attachment-full size-full\" alt=\"Wraith\" srcset=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Wraith.jpg 969w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Wraith-300x160.jpg 300w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Wraith-768x411.jpg 768w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Wraith-620x331.jpg 620w\" sizes=\"auto, (max-width: 969px) 100vw, 969px\" \/>                        <\/div>\n<\/div>[vc_empty_space height=&#8221;38px&#8221;][vc_column_text]<a href=\"https:\/\/github.com\/bbc\/wraith\" target=\"_blank\" rel=\"noopener\">Wraith<\/a> is a visual testing tool based on screenshot comparisons, developed by none less than the BBC News team. This <strong>open-source and free tool<\/strong> which can be found on GitHub uses a headless browser to capture the pages at different times or in different environments and then compares them. Any difference that is found between the two is highlighted in blue.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]This tool can run in two modes: comparison of two domains (which can involve spidering of two domains for changes or running several comparisons at once) and comparison of the same domain over different time intervals.<br \/>\n[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]After the tool takes the screenshots, it runs a comparison and creates both an image with differences highlighted, and a .txt with percentages of pixels that differ. The user can specify a threshold for changes and differences and if the test shows results that are above the threshold, it will yield a system error code.<br \/>\n[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]<strong>Wraith is free but it does require installation and scripting.<\/strong> You will also have to use at least one headless browser, such as Chrome, CasperJS, SlimerJS or PhantomJS. You will also need to have ImageMagick installed in order to view the comparison files.[\/vc_column_text][vc_empty_space height=&#8221;68px&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h2 class=\"qodef-h4\"><a id=\"backstopjs\"><\/a>BackstopJS<\/h2>\n<p>[\/vc_column_text][vc_empty_space height=&#8221;21px&#8221;]<div class=\"qodef-single-image-holder   qodef-has-border \">\n    <div class=\"qodef-si-inner\" >\n                                    <img loading=\"lazy\" decoding=\"async\" width=\"969\" height=\"518\" src=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/BackstopJS.jpg\" class=\"attachment-full size-full\" alt=\"BackstopJS\" srcset=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/BackstopJS.jpg 969w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/BackstopJS-300x160.jpg 300w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/BackstopJS-768x411.jpg 768w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/BackstopJS-620x331.jpg 620w\" sizes=\"auto, (max-width: 969px) 100vw, 969px\" \/>                        <\/div>\n<\/div>[vc_empty_space height=&#8221;38px&#8221;][vc_column_text]<a href=\"https:\/\/github.com\/garris\/BackstopJS\" target=\"_blank\" rel=\"noopener\">BackstopJS<\/a> is a visual regression testing tool for responsive web apps and another open-source tool on our list. Similarly to Wraith, it requires you to have a solid grasp of installation and scripting, and you will need to have Chrome , CasperJS or another headless browser.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]BackstopJS provides users with in-browser reporting UI with <strong>separate layout settings for print and screen, scenario display filtering, test approval, reference, test and visual diff inspector<\/strong>, and something that the developers call \u201ccool scrubber thingy.\u201d You also get CLI reports, integrated docker rendering that prevents cross-platform rendering, JUnit reports, and render tests with Chrome Headless.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]On top of that, you get to simulate user interactions using Puppeteer or Playwright scripts. Plus, <strong>the tool has only three commands<\/strong> and, except for installation and scripting, it\u2019s very easy to use.[\/vc_column_text][vc_empty_space height=&#8221;68px&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h2 class=\"qodef-h4\"><a id=\"percy\"><\/a>Percy<\/h2>\n<p>[\/vc_column_text][vc_empty_space height=&#8221;21px&#8221;]<div class=\"qodef-single-image-holder   qodef-has-border \">\n    <div class=\"qodef-si-inner\" >\n                                    <img loading=\"lazy\" decoding=\"async\" width=\"969\" height=\"518\" src=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Percy.jpg\" class=\"attachment-full size-full\" alt=\"Percy\" srcset=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Percy.jpg 969w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Percy-300x160.jpg 300w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Percy-768x411.jpg 768w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Percy-620x331.jpg 620w\" sizes=\"auto, (max-width: 969px) 100vw, 969px\" \/>                        <\/div>\n<\/div>[vc_empty_space height=&#8221;38px&#8221;][vc_column_text]If you\u2019re looking for a VRT tool that\u2019s built with collaboration in mind, you should check out <a href=\"https:\/\/www.browserstack.com\/percy\" target=\"_blank\" rel=\"noopener\">Percy<\/a>. This excellent tool was developed by BrowserStack and lists Twitter, Microsoft, jQuery, Harvard University and Wikimedia as its most prominent users.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]This tool is designed to help you detect visual bugs by capturing screenshots and then conducting pixel-to-pixel comparisons with every commit. So far, it\u2019s basically the same thing as the previous tools, except Percy has some additional automation and integration features that allow you to seamlessly incorporate it into your workflow. <strong>You can get results either in your test integration framework or directly in your application.<\/strong> Visual changes are grouped and filtered to exclude noisy elements, which guarantees faster reviews. Your team is informed of everything every step of the way thanks to notifications and comments functionality.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]<strong>You can use Percy core features for free<\/strong>, with unlimited users and up to 5000 screenshots per month. If you need more (and richer features), there are paid plans for desktop, desktop and mobile, and enterprise version, for which you\u2019ll need to contact the BrowserStack sales team.[\/vc_column_text][vc_empty_space height=&#8221;68px&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h2 class=\"qodef-h4\"><a id=\"visual-regression-tests\"><\/a>VRTs &#8211; Visual Regression Tests<\/h2>\n<p>[\/vc_column_text][vc_empty_space height=&#8221;21px&#8221;]<div class=\"qodef-single-image-holder   qodef-has-border \">\n    <div class=\"qodef-si-inner\" >\n                                    <img loading=\"lazy\" decoding=\"async\" width=\"969\" height=\"518\" src=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Visual-Regression-Tests.jpg\" class=\"attachment-full size-full\" alt=\"Visual Regression Tests\" srcset=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Visual-Regression-Tests.jpg 969w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Visual-Regression-Tests-300x160.jpg 300w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Visual-Regression-Tests-768x411.jpg 768w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Visual-Regression-Tests-620x331.jpg 620w\" sizes=\"auto, (max-width: 969px) 100vw, 969px\" \/>                        <\/div>\n<\/div>[vc_empty_space height=&#8221;38px&#8221;][vc_column_text]WordPress users looking for a visual regression testing tool designed specifically for their CMS should check out <a href=\"https:\/\/bleech.de\/en\/products\/visual-regression-tests\/\" target=\"_blank\" rel=\"noopener\">VRTs &#8211; VIsual Regression Test<\/a>. It is a plugin that, once installed and activated, regularly checks your website\u2019s frontend for visual bugs and changes and then sends alerts and notifications in your backend. It works by using a reference screenshot, set by the user, and daily automated screenshots. It then compares them with each other to detect changes. It can help with bugs and issues caused by plugin updates, missing checks, code changes, server problems, malicious code, external services such as incorrectly fetched API integrations, and so on.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]This solution is ideal for WordPress users who don\u2019t want to bother with installation and scripting, <strong>since it requires no coding and is very easy to set up.<\/strong>[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]The free version of this plugin offers testing of three pages max, daily testing intervals and alert history up to a month. The Pro plan costs $39\/month and allows you to test up to 25 pages, has a 90 day alert history, multiple alert participants and email support.<br \/>\n[\/vc_column_text][vc_empty_space height=&#8221;68px&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h2 class=\"qodef-h4\"><a id=\"screenster\"><\/a>Screenster<\/h2>\n<p>[\/vc_column_text][vc_empty_space height=&#8221;21px&#8221;]<div class=\"qodef-single-image-holder   qodef-has-border \">\n    <div class=\"qodef-si-inner\" >\n                                    <img loading=\"lazy\" decoding=\"async\" width=\"969\" height=\"518\" src=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Screenster.jpg\" class=\"attachment-full size-full\" alt=\"Screenster\" srcset=\"https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Screenster.jpg 969w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Screenster-300x160.jpg 300w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Screenster-768x411.jpg 768w, https:\/\/qodeinteractive.com\/magazine\/wp-content\/uploads\/2023\/04\/Screenster-620x331.jpg 620w\" sizes=\"auto, (max-width: 969px) 100vw, 969px\" \/>                        <\/div>\n<\/div>[vc_empty_space height=&#8221;38px&#8221;][vc_column_text]Another code-free solution for UI VTR testing you should check out is <a href=\"https:\/\/www.screenster.io\/\" target=\"_blank\" rel=\"noopener\">Screenster<\/a>. It is a somewhat different solution from the others on this list since it doesn\u2019t take screenshots and instead <strong>records your interactions with your webpages<\/strong>. It then reruns the recorded tests and optimizes them with automatically extracted parameters and also <strong>stores self-healing selectors for all actions<\/strong>. After the test, you can review the detected changes and update your default baseline with them. If, for whatever reason, you need to exclude one or more UI elements from the comparison, that\u2019s possible, too. There\u2019s also <strong>a Team Portal that your team can use to run tests and access the results.<\/strong>[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]This is a server-based solution, which means you don\u2019t have to install anything or adjust anything at all. Simply paste the desired URL to Screenster and let it run a 5-minute test. <strong>You can do this on the Screenster cloud or download the server and install it on-prem.<\/strong> While this is definitely an advantage that Screenster has over the other VTR solutions, it also has a downside &#8211; it has a steep learning curve, as it requires you to be comfortable with working with servers.[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]Screenster has a free plan with a single concurrent test, one user max, limited cloud test duration (3 minutes), and community support. Paid plans start at $25 per month and include multiple concurrent tests, more users, more tests on local and on cloud, longer test duration, and JIRA integration.<br \/>\n[\/vc_column_text][vc_empty_space height=&#8221;68px&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<h2 class=\"qodef-h4\">Wrapping It Up<\/h2>\n<p>[\/vc_column_text][vc_column_text]We\u2019re pretty confident that the solution you need for visual regression testing of your UI is right here on this list. You want a free and open-source solution that captures and compares screenshots? PIck between Wraith and BackstopJS. You prefer a WordPress plugin? For you, there\u2019s VRTs &#8211; Visual Regressions Test. Percy is great for teamwork and automation, and Screenster is perfect for bigger websites with enterprise needs, but also for smaller teams that are comfortable with server environments and want a feature-rich solution.<br \/>\n[\/vc_column_text][vc_empty_space height=&#8221;28px&#8221;][vc_column_text]Let us know which one you picked!<br \/>\n[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Our selection of the best visual regression testing tools will help you make sure your site is pixel-perfect at all times and improve your UX. <\/p>\n","protected":false},"author":3,"featured_media":43015,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[15,39,37,36,13],"class_list":["post-42998","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-resources","tag-plugins","tag-tools","tag-ui","tag-ux","tag-wordpress"],"_links":{"self":[{"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/posts\/42998","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/comments?post=42998"}],"version-history":[{"count":0,"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/posts\/42998\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/media\/43015"}],"wp:attachment":[{"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/media?parent=42998"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/categories?post=42998"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qodeinteractive.com\/magazine\/wp-json\/wp\/v2\/tags?post=42998"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}