# Create an A/B test

> Create a test draft for a bundle or cart, edit its versions, set the traffic split and start it.

Open **A/B Tests**, click **Create new test**, pick your bundle or cart and edit Version B. Then set the traffic, click **Save traffic** and click **Start test**. Version A is always your live bundle or cart.

## Before you start

- You need Plus. A free trial counts.
- The bundle must be published, or the cart must be on, before the test can start. You can build a draft first.

## Create the draft

1. In Shopify admin, open **Apps** → **Section Store** → **Bundles** or **Cart Drawer**.
2. Click **A/B Tests**.
3. Click **Bundles** or **Carts** at the top of the page.
4. Click **Create new test**.
5. Pick your **Bundle to test** or your **Cart**.
6. Click **Create new test**. You see "The test draft was created."

You can also open a live bundle or cart in its editor and click **A/B test**.

## Set up the versions

1. Under **Versions**, find Version B and click **Edit version**. The editor opens on that version.
2. Change what you want to test, then save.
3. To compare more, click **Add version**. You can have up to four versions.
4. Click **Review & start test** to go back to the test.

Each new version starts as a copy, so change one thing at a time. To rename the test, click the pencil next to its name.

Some settings can't differ between versions:

- **Bundles:** the products it shows on, its active dates and custom CSS.
- **Cart:** custom HTML, custom CSS and the settings that open the drawer.

## Set the traffic and start

1. Under **Traffic split**, drag the slider or click **Split evenly**. Then click **Save traffic**. **Start test** uses the saved split, and the split locks when the test starts. So save first.
2. Click **Preview** on a version to see it on your store. Previews don't count in your results.
3. Click **Start test**. If Shopify asks, click **Review Access Scopes** and approve.

You see "The test started. Versions B–D are now locked; Version A remains editable as the live item."

## After you start

- Versions B to D and the traffic split are locked.
- Version A stays editable, because it's your live bundle or cart. Don't edit it by hand during a test unless you must. Saved changes go live for Version A, shared settings change every version, and your results get harder to compare.

To change a locked version, end the test and start a new one.

## If it doesn't work

- **Create new test is greyed out.** See [Why can't I start my A/B test?](https://section-store.orka.help/a/why-cant-i-start-my-ab-test)
- **"The test could not be updated."** This bundle or cart may already have an open test. Find it in the list and open it.
- **Preview is greyed out.** The bundle or cart isn't live yet. Use **Edit version** to review it in the editor.

## Related

- [Run an A/B test on bundles or the cart drawer](https://section-store.orka.help/a/129-run-an-ab-test-on-bundles-or-the-cart-drawer)
- [How does A/B test traffic split between versions?](https://section-store.orka.help/a/how-ab-test-traffic-splits)
- [Read your A/B test results](https://section-store.orka.help/a/read-your-ab-test-results)

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