diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index f5e27808656..a401d1f10e2 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -58,6 +58,8 @@ Note that this also applies to debug logging and other internal strings, as they
 
 When possible, please include tests when fixing bugs or adding new features.
 
+If changes you’re making have relevant [Web Platform Tests (WPT)](https://wpt.fyi/) tests — especially if the changes cause Ladybird to pass any WPT tests it hadn’t yet been passing — you should consider [importing those tests into your Ladybird clone](https://github.com/LadybirdBrowser/ladybird/blob/master/Documentation/Testing.md#importing-web-platform-tests), and then commit the imported tests along with your code changes.
+
 ## Code submission policy
 
 Nobody is perfect, and sometimes we mess things up. That said, here are some good do's & don'ts to try and stick to:
diff --git a/Documentation/GettingStartedContributing.md b/Documentation/GettingStartedContributing.md
index ac049562cfa..8ff6e13470a 100644
--- a/Documentation/GettingStartedContributing.md
+++ b/Documentation/GettingStartedContributing.md
@@ -89,3 +89,4 @@ Make sure your code meets the requirements in the [full contribution guidelines]
 * Make correctly formatted, atomic commits (building the project at every commit should succeed).
 * Discuss and resolve any reviews you receive.
 * Fix CI failures by editing your commits.
+* Include tests ([use `Meta/import-wpt-test.py` to import WPT tests](Testing.md#importing-web-platform-tests))
diff --git a/Documentation/Testing.md b/Documentation/Testing.md
index 2c503cbec89..a21953d6fca 100644
--- a/Documentation/Testing.md
+++ b/Documentation/Testing.md
@@ -110,6 +110,17 @@ git checkout my-css-change
 ./Meta/WPT.sh run --log results.log 
 ```
 
+### Importing Web Platform Tests
+
+You can import certain Web Platform Tests (WPT) tests into your Ladybird clone (if they’re tests of type that can be imported — and especially if any code changes you’re making cause Ladybird to pass any WPT tests it hasn’t yet been passing). Here’s how:
+
+```sh
+./Meta/WPT.sh import html/dom/aria-attribute-reflection.html
+```
+
+That is, you give `./Meta/WPT.sh import` the path part of any `http://wpt.live/` URL for a WPT test you want to import. It will then download both that test and any of its JavaScript scripts, copy those to the `Tests/LibWeb/Text/input/wpt-import` directory, run the test, and then in the `Tests/LibWeb/Text/expected/wpt-import` directory, it will create a file with the expected results from the test.
+
+
 ## Writing tests
 
 Running `Tests/LibWeb/add_libweb_test.py your-new-test-name` will create a new test HTML file in