Use Cases

Theme testing: use cases

Theme tests are the right choice when you want to change something that affects your entire store — your header, footer, navigation, announcement bar, global colors, fonts, or cart behavior. These elements live outside any single page template, so only a theme test can vary them between visitors.

Not sure whether your change is template-level or theme-level?

Here's a quick rule of thumb: if the change would show up on every page of your store (header, footer, colors, fonts), it's a theme test. If it only affects one page type's content area, it's a template test.

Navigation and menus

Your navigation is one of the highest-impact elements on your store. It determines how easily visitors find products, and even small changes to menu structure or layout can influence conversion.

Test ideas:

• Simplify your main menu by reducing the number of top-level items and see whether it improves click-through to collections

• Test a mega menu with product images and featured collections vs. a simple dropdown list

• Rearrange menu item order — put your best-selling collection first vs. organizing alphabetically

• Add a "Shop All" or "Best Sellers" link to the main navigation and measure its impact

• Test a horizontal navigation bar vs. a hamburger menu on desktop

Menu duplication doesn't exist in Shopify. You'll need to manually create a second menu in Online Store > Navigation with your variant structure, then point your variant theme's header section to the new menu.

Announcement bar

The announcement bar is prime real estate at the very top of your store. It's one of the first things visitors see, and testing its content can have a surprisingly large effect on behavior.

Test ideas:

• Test different messaging: free shipping threshold vs. discount code vs. new collection launch

• Try removing the announcement bar entirely — does a cleaner look improve the shopping experience, or does removing the incentive hurt conversion?

• Test a multi-slide rotating announcement bar vs. a single static message

• Change the bar's color or styling to make it more (or less) prominent

• Add urgency language ("Ends tonight") vs. evergreen messaging ("Free shipping over $75")

Header layout

Beyond the menu itself, the header's overall design affects how visitors orient themselves on your store. Testing different header configurations can influence everything from search usage to cart engagement.

Test ideas:

• Test a sticky header that follows visitors as they scroll vs. a static header that disappears

• Try a minimalist header (logo + menu + cart only) vs. a feature-rich header with search bar, account link, and wishlist icon

• Move the search bar from a hidden icon to a prominent, always-visible input field

• Test logo placement — centered vs. left-aligned

• Add a "quick links" row below the main header with your top collections or a seasonal promotion

Footer

Footers are easy to overlook, but they're often where visitors go to find trust signals, policies, and secondary navigation. Testing your footer can improve both trust and discoverability.

Test ideas:

• Add a newsletter signup form to the footer and measure its impact on email capture

• Test a detailed multi-column footer (collections, policies, about, social links) vs. a minimal single-row footer

• Add customer service contact info (phone number, chat link, email) prominently in the footer

• Include trust badges (secure checkout, money-back guarantee, shipping partner logos) and measure whether they affect conversion

• Test adding a "recently viewed products" section above the footer

Global colors, fonts, and styling

Your brand's visual identity — colors, typography, spacing, button styles — is controlled by global theme settings. Theme testing lets you evaluate design changes across your entire store at once.

Test ideas:

• Test a brand refresh with updated colors and see how visitors respond before committing

• Try a different body font (more readable, more modern) and measure time on site and conversion

• Test larger vs. smaller product card sizing across your store

• Change your primary button color — does a high-contrast button improve add-to-cart rates?

• Test increased whitespace and section padding for a more open feel vs. a denser layout that shows more content above the fold

• Try a dark mode variant of your store for evening/night traffic

Global style changes affect every page. Preview your variant across multiple page types — homepage, product page, collection page, cart — to make sure everything looks right before launching.

Cart type

Whether your store uses a cart page or a cart drawer (slide-out panel) can significantly affect checkout flow. Cart type is a global theme setting, so testing it requires a theme test.

Test ideas:

• Test a full cart page vs. a slide-out cart drawer and measure which drives more completed checkouts

• If you already use a cart drawer, try a drawer with upsell recommendations vs. a minimal drawer with just the cart contents

• Test adding an "Express checkout" button (Apple Pay, Shop Pay) to the cart drawer

If you use a third-party cart app (like Rebuy Smart Cart or Slide Cart), test both variants carefully. The app may need separate configuration in each theme, and conflicts between the native cart and the app's cart can cause unexpected behavior.

Full theme redesign

With theme testing you can evaluate an entirely new theme before making it your default. Instead of launching a redesign and hoping for the best, you can run it as a test and let real visitor behavior tell you whether the new design performs better.

Test ideas:

• Test a new Shopify theme (from the Theme Store or a custom build) against your current live theme

• Evaluate a major redesign of your existing theme — new layout, new sections, new visual direction

• Test a seasonal or holiday-themed version of your store during peak shopping periods

• Try a simplified, conversion-focused design for paid traffic vs. your full brand experience

When testing a full redesign, start by duplicating your live theme and making changes to the duplicate. This guarantees template compatibility and gives you a clean starting point. Building from a completely different theme is possible, but requires more setup to ensure all templates match.

Multi-page changes

Sometimes a test idea touches multiple page types at once — for example, adding a promotional banner to both product pages and collection pages, or changing how product cards look everywhere they appear. Because template tests only affect one page type at a time, these cross-page changes are a natural fit for theme testing.

Test ideas:

• Add a site-wide promotional banner above the content area on every page type

• Change product card design (image ratio, hover effects, badge styling) everywhere they appear — collections, search results, recommendations

• Test a new "quick view" popup across all collection and search result pages

• Update your store's social proof display (review counts, trust badges) consistently across all page types

What theme tests cannot change

Theme tests swap between two complete Shopify themes, so they can change anything that lives in the theme. But some things are managed at the store level in Shopify, outside the theme entirely. Theme tests cannot change:

• Product data (titles, descriptions, images, prices, variants)

• Collection membership or sort order rules

• Menu item content (the items themselves are store-level; only menu selection in the header is theme-level)

• Pages, blog posts, or other content resources

• Shipping rates, payment providers, or checkout configuration

• Discount codes or automatic discounts

• Installed apps or app settings

For price changes, use a price test. For sending visitors to a different page entirely, use a URL redirect test.