> For the complete documentation index, see [llms.txt](https://etherfi.gitbook.io/etherfi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://etherfi.gitbook.io/etherfi/solo-stakers/operation-solo-staker/obol-dvt-explained/dappnode-setup/ethereum-validator-clients/testnet-holesky.md).

# Testnet (Holesky)

{% hint style="warning" %}
While the Dappnode machines have a large enough SSD to hold both Mainnet and Testnet Ethereum chains, you will have lower performance if you try to run both chains simultaneously.

If you are already running a Mainnet chain, it is best to [pause those packages](/etherfi/solo-stakers/operation-solo-staker/obol-dvt-explained/dappnode-setup/additional-configuration.md#remove-or-pause-packages) if you want to use a Testnet chain (e.g. Holesky). If you are running a Mainnet validator, pausing the Mainnet chain will stop that validator from performing its duties!
{% endhint %}

Once you have your Dappnode machine set up, the next step is to install the Holesky Testnet packages and begin syncing the chain.

### Install Testnet Validator Clients

Navigate to the `Stakers` menu and select the `Holesky` tab.

<figure><img src="/files/h2uVN5eHNYeHEH0ZyJTE" alt=""><figcaption></figcaption></figure>

Select one Execution Client, one Consensus Client, and MEV Boost.

<figure><img src="/files/ira3iXBVIfG1mWsZDpJ1" alt="" width="563"><figcaption></figcaption></figure>


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