diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index e9739b5047..a768da8c23 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -51,6 +51,7 @@
     </logging>
     <filter>
         <whitelist addUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">.</directory>
             <exclude>
                 <!-- we don't care about coverage of embedded libraries -->
                 <directory suffix=".php">libraries/tcpdf</directory>