---
title: Test customer account UI extensions
description: >-
  Test your customer account UI extensions in different user scenarios.
  Recreating merchant and customer experiences helps ensure that extensions
  behave as desired in different locations.
source_url:
  html: 'https://shopify.dev/docs/apps/build/customer-accounts/test'
  md: 'https://shopify.dev/docs/apps/build/customer-accounts/test.md'
---

# Test customer account UI extensions

**Feature preview:**

Customer accounts are getting layout and design updates. Enable the **Customer account improvements** feature preview to get early access. Review the [feature preview overview](https://shopify.dev/docs/apps/build/customer-accounts/feature-preview-customer-account-improvements).

Follow these guidelines to test your customer account UI extensions in different user scenarios. Recreating merchant and customer experiences helps ensure that extensions behave as desired in different locations.

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## Test locally

The [inline](https://shopify.dev/docs/apps/build/customer-accounts/inline-extensions/build-order-status) and [order action menu](https://shopify.dev/docs/apps/build/customer-accounts/order-action-extensions/build-for-order-action-menus) extensions tutorials show you how to start generating and previewing extensions. Previewing UI extensions locally is different when you use [static versus block targets](https://shopify.dev/docs/api/customer-account-ui-extensions/latest/targets).

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## Static targets

When you're using a [static target](https://shopify.dev/docs/api/customer-account-ui-extensions/latest/targets), the UI extension automatically renders in a chosen location.

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## Block targets

When you're using a [block target](https://shopify.dev/docs/api/customer-account-ui-extensions/latest/targets), merchants can place the UI extension in any of the supported placements on the page.

To preview a block extension in each supported placement, append `?placement-reference={name}` to the customer account URL that's outputted by [Shopify CLI](https://shopify.dev/docs/apps/build/cli-for-apps). For example, `?placement-reference=ORDER_SUMMARY3`.

[View all placement references](https://shopify.dev/docs/apps/build/customer-accounts/extension-placement#placement-references)

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## Next steps

[Deployment\
\
](https://shopify.dev/docs/apps/launch/deployment/app-versions)

[Learn how to deploy app versions to release changes to users.](https://shopify.dev/docs/apps/launch/deployment/app-versions)

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