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Black Friday 2026
Know your checkout broke before your customers tell you
A theme update or a new app goes live, and the checkout quietly stops working on mobile. Usually the first sign is an email from an annoyed customer. Testavi's AI agents shop your store every hour through Black Friday and alert you first.
For Shopify, Shopware, WooCommerce, Magento and custom stores. We onboard a limited number of stores per week.
What breaks in the weeks before Black Friday
November is when stores change the most: new themes, sale banners, extra apps, new discount codes. Every change is a chance for the checkout to break.
Theme and app updates. A new sale theme, an upsell app or a cart drawer goes live and the "Add to cart" button stops responding on some phones. Nothing looks wrong on your laptop.
A payment method drops off. PayPal, Klarna or Apple Pay disappears from checkout after a settings change or a plugin update. The customers who wanted to pay that way simply leave.
Discount codes. The BFCM code is rejected, applies to the wrong products, or stacks with another offer when it shouldn't. You hear about it in support tickets or see it in your margin.
Currency and language. The German store shows prices in dollars, a translation is missing on the payment step, or shipping to Austria suddenly isn't offered.
Third-party scripts. A chat widget, review app, tracking pixel or cookie banner loads slowly or covers the pay button. The page still loads, so uptime checks stay green.
How it works
You don't write anything or install anything on your store. We set it up and keep it running.
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We map your critical flows
On a short call we agree which journeys matter most for your sale: the products you'll push, the codes you'll run, the markets you ship to. We write those flows in plain English.
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AI agents shop your store every hour
The agents browse, add to cart, apply codes and go through checkout like a real customer, on desktop and on mobile web. When you change your theme, they adapt instead of breaking.
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You get an alert you can act on
If something fails, you get a message in Slack or by email with a video of the run and the exact step that broke. Forward it to your developer or agency and they can see the problem straight away.
What we test
We cover the journeys that cost you orders when they break. The exact list depends on your store, and we agree it with you during setup.
Product pages
Sizes and variants can be picked, sale prices show correctly and the product goes into the cart.
Cart
Quantities update, totals add up and free-shipping thresholds work as you set them.
Promo codes
Your Black Friday codes apply, give the right discount and don't stack where they shouldn't.
Checkout
Address and shipping steps work, your payment methods are offered, and the order can be placed up to the pay button.
Account login
Returning customers can log in and see their account and saved details.
Subscriptions
Subscribe-and-save options show up and can be chosen at checkout.
Markets and languages
Currency, language and shipping options are right for each country you sell to.
Desktop and mobile web
Every flow runs on a desktop browser and a mobile browser, where most sale traffic tends to land.
Monitoring tools tell you after customers fail. We catch it first.
Uptime checks and analytics are useful, but they wait for real traffic. By the time a conversion drop shows up on a dashboard, customers have already left.
| Uptime and analytics | Testavi | |
|---|---|---|
| What it checks | The page loads | A customer can actually buy |
| When you find out | After orders drop | Within the hour, from our own test runs |
| Discount codes | Not checked | Applied and totals verified |
| What you get | A graph or a status code | Video and the step that broke |
Safe to run on your live store
The agents shop your store, but they don't buy from it.
- Do you place real orders?
- No. We never place real orders or charge real cards. By default every run stops right before payment. If you want the full payment step covered, give us a test mode or a test product and we'll use only that.
- Will it mess up my analytics or stock?
- Runs add items to a cart but never complete an order, so nothing is sold or shipped. We'll show you how to keep our visits out of your analytics.
- We use Cloudflare or bot protection.
- That's common. We'll help you allowlist our agent so it gets through without weakening protection for everyone else.
- Who are you?
- Testavi is based in Berlin and our servers run in Germany. You work directly with the founder and the team who set up your flows. More on the about page.
Black Friday Checkout Watch
One fixed price that covers you from setup through the whole peak season. We onboard a limited number of stores per week because each setup is done by hand.
One-time, covers now through 31 December 2026
€990
- We set up and maintain your critical flows: browse, product, cart, promo codes, checkout, account login and subscriptions
- Hourly runs on desktop and mobile web
- Alerts to Slack or email with a video and the steps that failed
- A daily summary during Black Friday week
- Flows updated when you change your theme, apps or codes
Afterwards you can keep it running from €299/month, with no contract. Or let it end on 31 December.
Book a callQuestions
- Which shop systems do you support?
- Shopify, Shopware, WooCommerce, Magento and custom-built stores. The agents use your store through the browser like a customer, so there's no plugin to install.
- How much work is it for us?
- A short call to agree the flows, plus a test product or test mode if you want payment covered. We do the setup and keep the flows up to date.
- How soon can we start?
- It depends on how many stores we're onboarding that week. Book a call and we'll give you a start date. The earlier you start, the more of your pre-sale changes we catch.
- We're an agency with several clients.
- That works. Each store is set up separately, and alerts can go to your team, your client or both. Talk to us about covering several stores.
- What happens after 31 December?
- Monitoring stops unless you choose to continue. If you do, plans start at €299/month with no contract. More on what's possible in checkout flow testing.
- What if a run fails but the store is fine?
- Every alert comes with a video, so you can see in seconds what happened. If a flow is too sensitive, we adjust it.
Go into Black Friday knowing your checkout works
Book a call, tell us which flows matter most, and we'll get your store watched every hour through the end of the year.