diff --git a/tests/phpunit.xml b/tests/phpunit.xml
index 2dd3715ac..678e29a81 100644
--- a/tests/phpunit.xml
+++ b/tests/phpunit.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8" ?>
-<phpunit bootstrap="bootstrap.php">
+<phpunit bootstrap="bootstrap.php" convertDeprecationsToExceptions="true">
 	<testsuite name="circles">
 		<directory suffix='Test.php'>.</directory>
 	</testsuite>