diff --git a/README.md b/README.md
index cd5e36c..c0f82ba 100644
--- a/README.md
+++ b/README.md
@@ -395,6 +395,7 @@ Please see [CONTRIBUTING](https://github.com/ziadoz/awesome-php/blob/master/CONT
 * [Deptrac](https://github.com/sensiolabs-de/deptrac) - A static code analysis tool that helps to enforce rules for dependencies between software layers.
 * [Mondrian](https://github.com/Trismegiste/Mondrian) - A code analysis tool using Graph Theory.
 * [phan](https://github.com/phan/phan) - A static analyzer based on PHP 7+ and the php-ast extension.
+* [PHP Architecture Tester](https://github.com/carlosas/phpat) - Easy to use architecture testing tool for PHP.
 * [PHPCompatibility](https://github.com/PHPCompatibility/PHPCompatibility) - A PHP compatibility checker for PHP CodeSniffer.
 * [PhpDependencyAnalysis](https://github.com/mamuz/PhpDependencyAnalysis) - A tool to create customisable dependency graphs.
 * [PHP Metrics](https://github.com/phpmetrics/PhpMetrics) - A static metric library.