diff --git a/composer.json b/composer.json
index 4347967b196b4ffb0d54cc63e394d5ba1f829d0c..61397de41147fcd199e38c3eb0cea8779496ca07 100644
--- a/composer.json
+++ b/composer.json
@@ -28,6 +28,6 @@
         "piwik/device-detector": "2.*"
     },
     "require-dev": {
-        "phpunit/phpunit": "4.*"
+        "phpunit/phpunit": "~4.1"
     }
 }
diff --git a/composer.lock b/composer.lock
index aa25e6356e3457612fc15950f635d1e45e10e158..d8f75e7be35d61c18c29878f53e81f073d5840cf 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "016b7b6646d1d3ec6d8b574b5a6c5561",
+    "hash": "a369c506837f7af17cd3258c889e3b57",
     "packages": [
         {
             "name": "leafo/lessphp",
diff --git a/tests/PHPUnit/phpunit.xml.dist b/tests/PHPUnit/phpunit.xml.dist
index 6b13b5dcae7d1db328dffe18a145641e0767f5f5..d344206dd2aa147e84d49a7f1a6e19461a5ad4c4 100644
--- a/tests/PHPUnit/phpunit.xml.dist
+++ b/tests/PHPUnit/phpunit.xml.dist
@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<phpunit backupGlobals="true"
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.1/phpunit.xsd"
+         backupGlobals="true"
          backupStaticAttributes="false"
          bootstrap="bootstrap.php"
          colors="false"
@@ -14,7 +16,6 @@
          stopOnFailure="false"
          stopOnIncomplete="false"
          stopOnSkipped="false"
-         syntaxCheck="false"
          strict="false"
          verbose="true">