diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index c68df965..ac897053 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -4,6 +4,7 @@
     xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.5/phpunit.xsd"
          backupGlobals="true"
          bootstrap="vendor/autoload.php"
+         convertDeprecationsToExceptions="true"
          verbose="true"
          colors="true"
          forceCoversAnnotation="false"