> For the complete documentation index, see [llms.txt](https://docs.walnutai.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.walnutai.ai/test-and-quality-management/test-management/test-cases/manage-test-data-of-a-test-case.md).
# Manage Test Data of a Test Case
**Test Data** refers to the set of input values and parameters used to execute a test case and validate system behaviour. Proper test data ensures accurate, consistent, and repeatable test execution.
Test Data Management in WalnutAI consists of [**Test Data**](#user-content-fn-1)[^1] and [**Nested Test Data**.](#user-content-fn-2)[^2]
* The Test Data section is specific to an individual test case, allowing you to define the exact values as per the test case which will be used during execution.
* To add a dataset in a test case open the test case > Test Data and click '**Add Dataset'** and enter parameter values (such as URL, Email, or Password). All fields are editable and can be customized based on your test requirements.
* Use the '**Import'** option to upload external datasets if they are already available.
* Click '**Export'** to download the existing datasets for external use.
* After adding or updating data, click '**Save All'** to ensure the datasets are stored and ready for execution.
{% hint style="info" %}
Test cases created using **Smart Recording from the Intelligence Hub** will have parameters automatically identified and mapped.
{% endhint %}
* **Nested Test Data** section applies to nested test cases (reusable test cases executed within other test cases).
* **Left Panel:** Displays the nested test case structure (branches).
* **Right Panel:** Shows parameter values and datasets for the selected branch.
{% hint style="info" %}
If multiple datasets exist, select the required ones using the checkbox to make it as Default which will be used for execution; otherwise, the system defaults to the first dataset. When multiple datasets are selected, the platform performs **Iterative Execution**, running the test once per selected dataset.
{% endhint %}
[^1]: Test Data is the input you give to a test case to check if the system works correctly.
[^2]: Nested Test Data is the input used for a nested (reusable) test case that runs inside another test case.
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