diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 4ffa17f35c..f871fdada8 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
 <phpunit
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
     bootstrap="vendor/autoload.php"
     colors="true"
 >