diff --git a/.github/workflows/php8.3.yml b/.github/workflows/php8.3.yml
new file mode 100644
index 00000000..a09b8762
--- /dev/null
+++ b/.github/workflows/php8.3.yml
@@ -0,0 +1,41 @@
+# @Author: Roni Laukkarinen
+# @Date:   2023-02-15 17:39:37
+# @Last Modified by:   Roni Laukkarinen
+# @Last Modified time: 2024-02-14 17:15:37
+name: PHP
+
+on: [push, pull_request]
+
+env:
+  PHPCS_DIR: /tmp/phpcs
+  PHPCOMPAT_DIR: /tmp/phpcompatibility
+  SNIFFS_DIR: /tmp/sniffs
+  WPCS_DIR: /tmp/wpcs
+
+jobs:
+  build:
+    name: Test for PHP 8.3 support
+    runs-on: ubuntu-20.04
+
+    steps:
+    - name: Checkout the repository
+      uses: actions/checkout@v3
+
+    - name: Setup PHP with Xdebug 2.x
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: '8.3'
+        coverage: xdebug2
+
+    - name: Set up PHPCS and WordPress-Coding-Standards
+      uses: php-actions/composer@v6
+      env:
+        COMPOSER: "composer.json"
+      with:
+        php_version: "8.3"
+        version: "2.3.7"
+        args: "--ignore-platform-reqs --optimize-autoloader"
+
+    - name: Run PHP_CodeSniffer
+      run: |
+        vendor/bin/phpcs -p . --extensions=php --ignore=vendor,node_modules,src,js,css,sass --runtime-set testVersion 8.3
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80d6cd8e..8bdcd1d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 * Add unit tests for PHPCompatibility
 * Upgrade PHP version in use to PHP 8.3
 * Require PHP 8.3
+* Unit tests: Separately test for PHP 8.3 support
 
 ### 9.3.6: 2024-01-10
 
diff --git a/README.md b/README.md
index d85a0bd5..a059e239 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ## Air-light - A minimalist WordPress starter theme
 
-[![GitHub release](https://img.shields.io/github/tag/digitoimistodude/air-light.svg?style=flat-square)](https://github.com/digitoimistodude/air-light/releases) ![GitHub contributors](https://img.shields.io/github/contributors/digitoimistodude/air-light.svg?style=flat-square) [![Build Status for HTML](https://github.com/digitoimistodude/air-light/actions/workflows/html.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/html.yml) [![Build Status for JS](https://github.com/digitoimistodude/air-light/actions/workflows/js.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/js.yml)  [![Build Status for CSS](https://github.com/digitoimistodude/air-light/actions/workflows/styles.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/styles.yml) [![Build Status for PHP](https://github.com/digitoimistodude/air-light/actions/workflows/php.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/php.yml)
+[![GitHub release](https://img.shields.io/github/tag/digitoimistodude/air-light.svg?style=flat-square)](https://github.com/digitoimistodude/air-light/releases) ![GitHub contributors](https://img.shields.io/github/contributors/digitoimistodude/air-light.svg?style=flat-square) [![Build Status for PHP 8.3](https://github.com/digitoimistodude/air-light/actions/workflows/php.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/php8.3.yml) [![Build Status for HTML](https://github.com/digitoimistodude/air-light/actions/workflows/html.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/html.yml) [![Build Status for JS](https://github.com/digitoimistodude/air-light/actions/workflows/js.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/js.yml) [![Build Status for CSS](https://github.com/digitoimistodude/air-light/actions/workflows/styles.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/styles.yml) [![Build Status for PHP](https://github.com/digitoimistodude/air-light/actions/workflows/php.yml/badge.svg)](https://github.com/digitoimistodude/air-light/actions/workflows/php.yml)
 
 Air-light (or simply *Air*) is designed to be an ultra minimal starting point for a WordPress project at [Digitoimisto Dude Oy](https://www.dude.fi), a Finnish boutique digital agency in the center of Jyväskylä. Theme is originally based on [\_s](https://github.com/automattic/_s). We welcome all happy contributors with open arms! [See roadmap](https://favro.com/organization/3b45e73eaf083f68fefef368/c1dd2d4a99d6723904d2e763).
 
diff --git a/phpcs.xml b/phpcs.xml
index 734bea52..3ee69c68 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -126,8 +126,4 @@
             <property name="is_theme" value="true" />
         </properties>
     </rule>
-
-    <!-- Include sniffs for PHP cross-version compatibility. -->
-    <config name="testVersion" value="8.3-"/>
-    <rule ref="PHPCompatibility"/>
 </ruleset>