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diff --git a/docs/code-quality/lint/linters/eslint-plugin-mozilla/no-addtask-setup.rst b/docs/code-quality/lint/linters/eslint-plugin-mozilla/no-addtask-setup.rst
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+no-addtask-setup
+================
+
+Reject using ``add_task(async function setup() { ... })`` in favour of
+``add_setup(async function() { ... })``.
+
+Using semantically separate setup functions makes ``.only`` work correctly
+and will allow for future improvements to setup/cleanup abstractions.
+
+This option can be autofixed (``--fix``).
+
+Examples of incorrect code for this rule:
+-----------------------------------------
+
+.. code-block:: js
+
+    add_task(async function setup() { ... });
+    add_task(function setup() { ... });
+    add_task(function init() { ... });
+
+Examples of correct code for this rule:
+---------------------------------------
+
+.. code-block:: js
+
+    add_setup(async function() { ... });
+    add_setup(function() { ... });