# Customization: Automatically link changed Test Cases

The *Link on change* customization can be used to link changed Test Cases to a work item or pull request, related to the change.

{% hint style="info" %}
The *Link on change* customization described here is an [Enterprise feature](https://docs.specsolutions.eu/specsync/jira/licensing).
{% endhint %}

In order to enable this customization, the `customizations/linkOnChange` section of the configuration has to be enabled. The complete reference of the configuration settings can be found in the [customizations configuration reference](https://docs.specsolutions.eu/specsync/jira/reference/configuration/configuration-customizations#linkonchange).

The following example shows a basic configuration that links the changed Test Cases to a issue specified by the environment variable `CURRENT_STORY`.

```javascript
{
  ...
 "customizations": {
    "linkOnChange": {
      "enabled": true,
      "links": [
        {
          "targetId": "{env:CURRENT_STORY}",
        }
      ]
    }
  }
  ...
}
```

You can use environment variable references in the `targetId` setting as shown above. If the `targetId` evaluates to an empty string, no link will be added.