diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 5d3c842b..e76e2b6a 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -4,6 +4,7 @@
          beStrictAboutTestsThatDoNotTestAnything="false"
          bootstrap="vendor/autoload.php"
          colors="true"
+         convertDeprecationsToExceptions="true"
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"