diff --git a/tests/phpunit.xml b/tests/phpunit.xml
index d3670c811..c065d13cd 100644
--- a/tests/phpunit.xml
+++ b/tests/phpunit.xml
@@ -24,7 +24,7 @@ PHPUnit configuration file for tests.
          cacheTokens="false"
          colors="false"
          convertErrorsToExceptions="true"
-         convertNoticesToExceptions="false"
+         convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
          forceCoversAnnotation="false"
          mapTestClassNameToCoveredClassName="false"