> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getbluejay.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Use Previous Digital Humans

> Rerun the same Digital Humans across tests.

Use this type to run the same callers again, for example to compare two agent versions or to check that a fixed failure stays fixed.

## Set it up

**1. Select the card**

[Create a simulation](/test/simulations/create.md#create-a-simulation) and select the **Use Previous Digital Humans** card.

![Use Previous Digital Humans card in the Create Simulation type picker](https://mintcdn.com/bluejay/EeUk0hD_moG9tWmI/images/create-simulation-card-previous-digital-humans.png?fit=max\&auto=format\&n=EeUk0hD_moG9tWmI\&q=85\&s=c6743e97118c240a2ce98ec21ab49500)

**2. Pick the Digital Humans**

Select single Digital Humans, or select the checkbox next to a Community to add all its members. Bluejay runs them as they are and does not generate new ones.

To keep a set of callers for each agent or flow, save them as a [Community](/test/simulations/digital-humans.md#communities).

## Related

* [Communities](/test/simulations/digital-humans.md#communities)
* [Communities API](/api-reference/endpoint/create-community.md)


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