How to Install the Shopify Testament Theme

Testament is a paid theme, so installing it starts with a purchase, not a free add — here's the full flow.

Steps

Visit the Testament listing on the Shopify Theme Store, or reach it from your admin via Online Store > Themes > Visit Theme Store.
Click Try theme to preview it live using your own store's products and content, at no cost yet.
When you're ready to keep it, click Buy theme ($250 USD, one-time payment). This adds Testament directly to your store's theme library — no code or file upload involved.
From Online Store > Themes, find Testament in your library and click Customize to start editing, or Actions > Publish to make it your live theme.

Buying the theme gives you a lifetime license for that store, including future updates — there's no separate subscription or renewal fee.