Short Answer: What is Google testing in Search results?
Google appears to be testing the removal of the thin horizontal line that sits below the header and search tabs on its results page. Sachin Patel reported it on October 20, 2026, and Search Engine Roundtable’s Barry Schwartz says he could reproduce results both with and without the line. Google has not confirmed the test, and Patel says it could also be a display bug.
Quick Summary
- Search Engine Watch and Search Engine Roundtable both reported the change on October 20, 2026.
- Patel says he saw the results page without the thin line below the header and assumed it was a new test, but is not sure whether it is intentional or a bug.
- Schwartz says he could see the page both with and without the line.
- Neither report says whether Google confirmed the test, and neither names devices or countries.
- Nothing in the reports connects the change to rankings or traffic. It is a visual change to the page layout.
The change is small, which is why it is worth a short note rather than a long analysis. Google often tests layout changes on a subset of users, and some of those tests never ship.
What Did Google Change?
On Google’s results page, a thin horizontal line sits below the search box and the tabs, such as All, Images, and News. Search Engine Roundtable describes the change as Google testing the removal of that line, which it explains is a horizontal rule, a divider between sections of a page.
Both outlets published screenshots of the results page with and without the line.
Who Spotted It, and Is It Confirmed?
Sachin Patel reported the change in Search Engine Watch and on X on October 20. In his words, a thin line used to sit below the header, and when he saw the page without it he assumed it was a new test. He added that he is not sure how removing the line would help users and that it is possible this is a bug rather than an intentional test.
Search Engine Roundtable’s Barry Schwartz says he could reproduce the page both with and without the line, which suggests the test is being shown to some users and not others. Neither article reports a statement from Google, and neither says which devices or countries are affected.
What Else Is Google Testing in Search Layouts?
The line is one of several interface experiments reported this month. Search Engine Roundtable reported on October 14 that Google appeared to be testing AI Mode’s left vertical sidebar on the main results page, spotted by Damien Andell, with Schwartz unable to reproduce it and suspecting a limited test. Search Engine Watch’s page for the new report also lists a separate item dated October 20 saying Google is showing an AI Mode side panel next to Search results.
Separately, Google announced changes to inline links in AI answers last week, which we covered in our inline links story, and rolled out Gemini 4 Argon in AI Mode, covered in our Gemini 4 Argon article.
What Does This Mean for Marketers?
The following are our observations. The reports describe a visual change only.
- Do not change SEO plans over a divider line. Nothing reported ties this test to rankings, impressions, or click behavior.
- Keep dated screenshots of your key results. Layout tests can make results pages look different from one user to another. If you report on how your listing appears, note the date and the device, and capture the page as you see it.
- Watch for patterns, not single changes. The line, the sidebar, and the AI Mode side panel are separate tests, but together they show Google continuing to adjust how Search and AI Mode share the page. Our guide to AI visibility metrics covers measures that do not depend on the page layout.
- Check your own results. Patel invites readers to say whether they see the line missing. Open a few searches in a normal window and a private one, and note what you see.
If Google confirms the test or rolls it out, we will update this article.
Frequently Asked Questions
What is Google testing in its search results?
Google appears to be testing the removal of the thin horizontal line that sits below the header and search tabs on the results page, according to Search Engine Watch and Search Engine Roundtable.
Has Google confirmed the test?
Not in the reports we reviewed. Patel says the change could be a display bug rather than an intentional test, and neither report cites a Google statement.
Will removing the line affect my rankings or traffic?
Nothing in the reports suggests it will. It is a visual change to the layout, and neither outlet links it to rankings or clicks.
Does everyone see the change?
No. Search Engine Roundtable’s Barry Schwartz says he could see the results page both with and without the line, which points to a test shown to some users.
Sources: Search Engine Roundtable: Google Search Tests Removing Horizontal Rule Line Under Tabs, Search Engine Watch: Google tests removing the line below the header in search results, Search Engine Roundtable: Google Tests AI Mode Left Sidebar On Main Google Search Results Page. Tests can change or end without notice.
About the author
Kai Williams
Kai Williams has been in marketing for years, with a long background in SEO before AEO had a name. He stepped into Answer Engine Optimization the moment AI started reshaping how people search, and has been tracking the shift ever since. At Prompt Insider, he covers AEO, AI marketing, and the future of search, breaking down what is changing and what brands need to do about it.
