diff --git a/phpunit/phpunit/4.7/phpunit.xml.dist b/phpunit/phpunit/4.7/phpunit.xml.dist
index e4aab3c5..f50358e2 100644
--- a/phpunit/phpunit/4.7/phpunit.xml.dist
+++ b/phpunit/phpunit/4.7/phpunit.xml.dist
@@ -20,8 +20,8 @@
     </testsuites>
 
     <filter>
-        <whitelist>
-            <directory>src</directory>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">src</directory>
         </whitelist>
     </filter>
 </phpunit>