Diluted

This plugin adds a WooCommerce payment method that completes checkout without a real payment provider. Orders are saved and marked paid like a normal purchase, only the payment is fake.
<ul>
<li>Admin-only – Only users who can <code>manage_woocommerce</code> (typically administrators and shop managers) see the method at checkout. Guests and customers never see it.</li>
<li>Paid immediately – Orders complete as if payment succeeded. Stock updates, emails, and other post-payment behavior run as usual.</li>
<li>Works everywhere you check out – Shortcode/classic checkout and the Cart & Checkout blocks.</li>
</ul>
<h3>Usage</h3>
<ol>
<li>Sign in as a user with the Shop manager or Administrator role (or any role that includes <code>manage_woocommerce</code>).</li>
<li>Add products to the cart and open checkout.</li>
<li>Choose the test payment method in the checkout, the default label is Test order (fake payment) unless you changed it under the gateway settings.</li>
<li>Place the order. You are redirected to the order received (thank-you) page; the order is recorded as paid.</li>
</ol>
You can customize the Title and Description shown at checkout under WooCommerce → Settings → Payments → Test order (admin only).

Diluted Test Order for WooCommerce

Adds a fake payment method so you can test the full checkout flow without a real payment provider. Ideal for staging, QA and local development.

Whodunit

Jb Audras

This plugins provides custom admin bar colors to differentiate environments (staging, preprod, production). It’s really easy to use and developer-friendly.
The plugin provides a settings screen which several options:
<ul>
<li>choose between several color predefined schemes.</li>
<li>use a favicon to better differentiate your environments in your browser’s tabs.</li>
<li>add a custom message in your admin bar, like “Production website”, “staging version” or whatever your want.</li>
<li>choose the user roles that will see the color scheme (other roles will see the default admin bar).</li>
</ul>
It also offers few PHP constants you can use in your <code>wp-config.php</code> file (see Frequently Asked Questions below).
Since WordPress Core will probably deprecate alternate admin color schemes in mid-term, this plugin is meant to be use by those who rely on colors to know is they are in staging, preproduction or production environment.
Last but not least, all provided color schemes are accessibility-ready!

Contextual Adminbar Color

OMG this is what I need.
I actually use the alternate colors, but I don't like to change the good "blacky" interface ;)
So, this is the best option ever.
And since the alt colors will disappear (soon?), it's a good idea to use this to prevent wrong wabsite updates and tons of wasted hours trying to figure "why this is not updating? HO CRAP I AM ON THE PRODUCTION SITE *phone rings* "hey, client… well listen… you won't believe me ha ha ha :|"

This is what I need

Perfect plugin that allows me to easily differentiate my various environments.

THX !

Great !!!

Really enjoy this plugin.
It’s simple and well integrated with WordPress admin UI.

I really like the optional configuration through wp-config.php.
After configuring it once in wp-config.php, I won’t ever need to reconfigure because it doesn’t loose settings on importing settings (eg. staging <-> production).

Great job @audrasjb!

Simple and very usefull!

Such a great helper! It gives me the safety to know exactly which environment I work on without having to worry. 
Sometimes things look just alike in your DEV, STAGE and PROD environment. And with this little plugin, it is immediately obvious which environment you work in.
And it also works on WP 5.6 - just checked...

Makes my life much better knowing exactly where I am

Use custom admin bar colors and favicons to differentiate your environments (staging/prod)

Diluted Test Order for WooCommerce vs Contextual Adminbar Color