diff --git a/composer.json b/composer.json
index a935cbe7..f4dd62cb 100644
--- a/composer.json
+++ b/composer.json
@@ -2,6 +2,7 @@
 	"require": {
 		"mnapoli/php-di": "~4.0",
 		"jbrooksuk/phpcheckstyle": "dev-master",
-		"lichtner/fluentpdo": "dev-master"
+		"lichtner/fluentpdo": "dev-master",
+		"phpunit/phpunit": "4.2.*"
 	}
 }
diff --git a/gruntfile.js b/gruntfile.js
index 6e3e4446..cfbdf7af 100644
--- a/gruntfile.js
+++ b/gruntfile.js
@@ -75,7 +75,7 @@ module.exports = function(grunt) {
 			},
 
 			tests: {
-				command: 'phpunit --strict --bootstrap src/AutoLoader.php tests/',
+				command: 'php vendor/phpunit/phpunit/phpunit --strict --bootstrap src/AutoLoader.php tests/',
 			},
 
 			upgrade: {