diff --git a/composer.json b/composer.json
index 8b8e15f..5c64c89 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "php-mock/php-mock-phpunit",
     "type": "library",
     "description": "Mock built-in PHP functions (e.g. time()) with PHPUnit. This package relies on PHP's namespace fallback policy. No further extension is needed.",
-    "keywords": ["phpunit", "mock", "stub", "test double", "function", "test", "TDD", "BDD"],
+    "keywords": ["phpunit", "mock", "stub", "test double", "function", "test", "testing", "TDD", "BDD"],
     "homepage": "https://github.com/php-mock/php-mock-phpunit",
     "license": "WTFPL",
     "authors": [