> For the complete documentation index, see [llms.txt](https://www.locksmith.guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.locksmith.guide/tutorials/more/testing-locksmith-on-unpublished-themes.md).
# Testing Locksmith on unpublished themes
By default, Locksmith will only automatically install itself to and update itself on the currently published theme, and does *not* automatically install itself to unpublished themes. However, there is a way to test Locksmith on unpublished themes.
### **To test Locksmith on an unpublished theme:**
1. Head to the in-app "Themes" page.
2. Click the "**Install**" button for the theme you'd like to test Locksmith on:
4. To preview the lock configuration you just installed, click the **three-dot menu** (…) next to the theme name, and select **Preview**:
When testing your locks on unpublished or the currently published theme, we recommend using a brand new private browsing session each time:\
[How to use a private browsing session](/tutorials/more/how-to-use-a-private-browsing-session.md)
{% hint style="warning" %}
**Important:** If you're using a URL with the `shopifypreview.com` domain to test, Locksmith changes won't be reflected there. The Shopify theme editor's built-in preview bypasses Locksmith entirely, so locks, keys, and any manual locking code will appear as if they aren't in place.\
\
For accurate testing, always use the preview URL that includes `?fts=0&preview_theme_id=` followed by your theme ID in the URL parameters — as described in this guide.
{% endhint %}
{% hint style="info" %}
Please note: when making changes to your locks and Locksmith settings, Locksmith will only update those on the currently published theme.\
\
To update the unpublished theme after making changes in-app, just click the "Install" button for that theme next to the theme name again, as outlined above.
{% endhint %}
### To remove Locksmith from an unpublished theme:
1. Head to the in-app "Themes" page.
2. Click the "**Uninstall**" button for the theme you'd like to remove Locksmith from:
### Setting a secondary theme:
Locksmith supports setting a **Secondary theme**, which receives automatic updates along with your published theme when changes are made in Locksmith.
1. In the **Unpublished themes** section, locate the theme you want to set as a secondary theme.
2. Click the **three-dot menu** (…) next to the theme name.
3. Select **Set as secondary theme**:
This theme will now receive all future updates made in Locksmith, in addition to the published theme.
---
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