---
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'
api_name: customer-account-ui-extensions
---

# Test customer account UI extensions

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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