diff --git a/README.md b/README.md
index 2ab20d1..0df6a82 100644
--- a/README.md
+++ b/README.md
@@ -19,59 +19,60 @@
 - [Why not?](#why-not)
 - [Cookie Cutter](#cookie-cutter)
 - [Models](#models)
-  - [Base model](#base-model)
-  - [Validation - `clean` and `full_clean`](#validation---clean-and-full_clean)
-  - [Validation - constraints](#validation---constraints)
-  - [Properties](#properties)
-  - [Methods](#methods)
-  - [Testing](#testing)
+  * [Base model](#base-model)
+  * [Validation - `clean` and `full_clean`](#validation---clean-and-full_clean)
+  * [Validation - constraints](#validation---constraints)
+  * [Properties](#properties)
+  * [Methods](#methods)
+  * [Testing](#testing)
 - [Services](#services)
-  - [Example - function-based service](#example---function-based-service)
-  - [Example - class-based service](#example---class-based-service)
-  - [Naming convention](#naming-convention)
-  - [Modules](#modules)
-  - [Selectors](#selectors)
-  - [Testing](#testing-1)
+  * [Example - function-based service](#example---function-based-service)
+  * [Example - class-based service](#example---class-based-service)
+  * [Naming convention](#naming-convention)
+  * [Modules](#modules)
+  * [Selectors](#selectors)
+  * [Testing](#testing-1)
 - [APIs & Serializers](#apis--serializers)
-  - [Naming convention](#naming-convention-1)
-  - [Class-based vs. Function-based](#class-based-vs-function-based)
-  - [List APIs](#list-apis)
-    - [Plain](#plain)
-    - [Filters + Pagination](#filters--pagination)
-  - [Detail API](#detail-api)
-  - [Create API](#create-api)
-  - [Update API](#update-api)
-  - [Fetching objects](#fetching-objects)
-  - [Nested serializers](#nested-serializers)
-  - [Advanced serialization](#advanced-serialization)
+  * [Naming convention](#naming-convention-1)
+  * [Class-based vs. Function-based](#class-based-vs-function-based)
+  * [List APIs](#list-apis)
+    + [Plain](#plain)
+    + [Filters + Pagination](#filters--pagination)
+  * [Detail API](#detail-api)
+  * [Create API](#create-api)
+  * [Update API](#update-api)
+  * [Fetching objects](#fetching-objects)
+  * [Nested serializers](#nested-serializers)
+  * [Advanced serialization](#advanced-serialization)
 - [Urls](#urls)
 - [Settings](#settings)
-  - [Prefixing environment variables with `DJANGO_`](#prefixing-environment-variables-with-django_)
-  - [Integrations](#integrations)
-  - [Reading from `.env`](#reading-from-env)
+  * [Prefixing environment variables with `DJANGO_`](#prefixing-environment-variables-with-django_)
+  * [Integrations](#integrations)
+  * [Reading from `.env`](#reading-from-env)
 - [Errors & Exception Handling](#errors--exception-handling)
-  - [How exception handling works (in the context of DRF)](#how-exception-handling-works-in-the-context-of-drf)
-    - [DRF's `ValidationError`](#drfs-validationerror)
-    - [Django's `ValidationError`](#djangos-validationerror)
-  - [Describe how your API errors are going to look like.](#describe-how-your-api-errors-are-going-to-look-like)
-  - [Know how to change the default exception handling behavior.](#know-how-to-change-the-default-exception-handling-behavior)
-  - [Approach 1 - Use DRF's default exceptions, with very little modifications.](#approach-1---use-drfs-default-exceptions-with-very-little-modifications)
-  - [Approach 2 - HackSoft's proposed way](#approach-2---hacksofts-proposed-way)
-  - [More ideas](#more-ideas)
+  * [How exception handling works (in the context of DRF)](#how-exception-handling-works-in-the-context-of-drf)
+    + [DRF's `ValidationError`](#drfs-validationerror)
+    + [Django's `ValidationError`](#djangos-validationerror)
+  * [Describe how your API errors are going to look like.](#describe-how-your-api-errors-are-going-to-look-like)
+  * [Know how to change the default exception handling behavior.](#know-how-to-change-the-default-exception-handling-behavior)
+  * [Approach 1 - Use DRF's default exceptions, with very little modifications.](#approach-1---use-drfs-default-exceptions-with-very-little-modifications)
+  * [Approach 2 - HackSoft's proposed way](#approach-2---hacksofts-proposed-way)
+  * [More ideas](#more-ideas)
 - [Testing](#testing-2)
-  - [Naming conventions](#naming-conventions)
-  - [Factories](#factories)
+  * [Overview](#overview-1)
+  * [Naming conventions](#naming-conventions)
+  * [Factories](#factories)
 - [Celery](#celery)
-  - [The basics](#the-basics)
-  - [Error handling](#error-handling)
-  - [Configuration](#configuration)
-  - [Structure](#structure)
-  - [Periodic Tasks](#periodic-tasks)
-  - [Beyond](#beyond)
+  * [The basics](#the-basics)
+  * [Error handling](#error-handling)
+  * [Configuration](#configuration)
+  * [Structure](#structure)
+  * [Periodic Tasks](#periodic-tasks)
+  * [Beyond](#beyond)
 - [Cookbook](#cookbook)
-  - [Handling updates with a service](#handling-updates-with-a-service)
+  * [Handling updates with a service](#handling-updates-with-a-service)
 - [DX (Developer Experience)](#dx-developer-experience)
-  - [`mypy` / type annotations](#mypy--type-annotations)
+  * [`mypy` / type annotations](#mypy--type-annotations)
 - [Django Styleguide in the Wild](#django-styleguide-in-the-wild)
 - [Additional resources](#additional-resources)
 - [Inspiration](#inspiration)
@@ -2342,6 +2343,14 @@ You can even handle all exceptions, but then, you should be sure those exception
 
 ## Testing
 
+### Overview
+
+Testing is an interesting & vast topic.
+
+As an overview, you can listen to [Radoslav Georgiev's talk at DjangoCon Europe 2022](https://www.youtube.com/watch?v=PChaEAIsQls):
+
+[![Quality Assurance in Django - Testing what matters](https://img.youtube.com/vi/PChaEAIsQls/0.jpg)](https://www.youtube.com/watch?v=PChaEAIsQls)
+
 In our Django projects, we split our tests depending on the type of code they represent.
 
 Meaning, we generally have tests for models, services, selectors & APIs / views.