diff --git a/tests/phpunit_no_coverage.xml b/tests/phpunit_no_coverage.xml
index e8f0f9508..37c2279a7 100644
--- a/tests/phpunit_no_coverage.xml
+++ b/tests/phpunit_no_coverage.xml
@@ -18,6 +18,7 @@
         <whitelist addUncoveredFilesFromWhitelist="false" processUncoveredFilesFromWhitelist="false">
             <directory suffix=".php">.*</directory>
             <exclude>
+                <directory>vendor/*</directory>
                 <directory suffix="tpl.php">../*</directory>
                 <directory suffix="lang.php">../*</directory>
                 <directory suffix="Test.php">../*</directory>