# 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](https://etherfi.gitbook.io/etherfi/solo-stakers/operation-solo-staker/obol-dvt-explained/additional-configuration#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="https://1029745181-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3Lk76lfvw9ecPIg0mK8%2Fuploads%2Fr6cFFVpIqFp30Ui8GlXy%2FStaker_Holesky.png?alt=media&#x26;token=b505159d-9f11-44fe-9c12-19f3cc07786f" alt=""><figcaption></figcaption></figure>

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

<figure><img src="https://1029745181-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3Lk76lfvw9ecPIg0mK8%2Fuploads%2FKPypCYDXIVeMfceUNOsR%2Fimage.png?alt=media&#x26;token=851f74bf-c197-4de7-8260-3307dfa25026" alt="" width="563"><figcaption></figcaption></figure>