WordPress Local Development With a .test Domain (hosts file)

To run a local WordPress site on a clean domain like `mysite.test`, map it to `127.0.0.1` in your hosts file and point your local server at the WordPress folder. This replaces ugly URLs like localhost:8888 with a real, memorable domain that behaves more like production, and it works with LocalWP, MAMP, XAMPP, and Docker.

Set up local WordPress with a .test domain

127.0.0.1 mysite.test

define('WP_HOME', 'http://mysite.test');
define('WP_SITEURL', 'http://mysite.test');

Why .test (not .dev or localhost)

.test is reserved by the IETF for testing, so it never collides with a real domain and browsers do not force HTTPS on it (unlike .dev). Pick the right TLD with which TLD to use for local development, and get the line format right with the hosts file syntax guide.

Per-tool notes

• LocalWP: it manages its own domains, but a hosts entry lets you align with a custom .test name.
• MAMP / XAMPP: add an Apache <VirtualHost> with ServerName mysite.test and the WP DocumentRoot.
• Docker: map the port and add the hosts entry; for many subdomains use wildcard local domains with dnsmasq. See also managing the hosts file with Docker.

From local to staging or production

When you later push this local build to a staging server or production, export the WordPress database along with the files. A same-domain move needs nothing more; only if the domain changes do you run a search-replace on the stored URLs, then switch DNS and follow normal propagation. Until then, the hosts file keeps your local .test domain entirely separate from the live site.

Local HTTPS (optional)

If a plugin requires HTTPS locally, generate a trusted certificate with mkcert, see local HTTPS on Mac with mkcert, and set the URLs to https://mysite.test.

Manage multiple WordPress sites cleanly

Running several WordPress builds means several .test domains, and the hosts file gets cluttered fast. Sleezr keeps each project’s mapping with a one-click toggle and flushes DNS automatically, so switching between WordPress sites is instant. For a broader stack view, see hosts file for Laravel and WordPress local dev.

_Last tested: June 2026 with WordPress 6.x on macOS, Windows and Linux._

Sources and further reading

• Official WordPress documentation
• The hosts file explained (Wikipedia)
• hosts(5) manual page (man7.org)