Merge pull request #3946 from shaedrich/phpunit

Add related to topic "PHPUnit"

Author: zkoppert

topics/phpunit/index.md

@@ -1,5 +1,5 @@
 ---
-related: php
+related: php, xunit, junit, xdebug, phpdbg, unit-testing, pcov, testdox, cobertura, code-coverage
 created_by: Sebastian Bergmann
 display_name: PHPUnit
 github_url: https://github.com/sebastianbergmann/phpunit
@@ -9,4 +9,4 @@ topic: phpunit
 url: https://phpunit.de/
 wikipedia_url: https://en.wikipedia.org/wiki/PHPUnit
 ---
-PHPUnit is a unit testing framework for the PHP programming language. It is an instance of the xUnit architecture for unit testing frameworks.
+**PHPUnit** is a unit testing framework for the PHP programming language. It is an instance of the xUnit architecture for unit testing frameworks.