# Trellis Doc is missing detail of file for fake ssl LE certificate config

**URL:** https://discourse.roots.io/t/trellis-doc-is-missing-detail-of-file-for-fake-ssl-le-certificate-config/12324
**Category:** trellis
**Tags:** letsencrypt
**Created:** 2018-04-26T17:43:38Z
**Posts:** 2

## Post 1 by @jecko — 2018-04-26T17:43:38Z

Hi, I would like to know in wich file we’re supposed to add the letsencrypt\_ca parameter to test with fake certificate of Let’s Encrypt? I you look in the doc: [https://roots.io/trellis/docs/ssl/#staging](https://roots.io/trellis/docs/ssl/#staging)

It didn’t mention the name of the file only in a group\_vars file. Which one?

Here the chunk in case:

Just set the following variable:

```
# in a group_vars file
letsencrypt_ca: "https://acme-staging.api.letsencrypt.org"
```

Thank you for adding this information or giving it to me please.

Thanks for Roots stack, it’s a really great dev solution for WP

---

## Post 2 by @ben — 2018-04-27T02:22:57Z

Add it to `group_vars/<environment>/main.yml`