diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index b73dcfa..2118a26 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -17,4 +17,9 @@
             <directory suffix="Test.php">./tests/</directory>
         </testsuite>
     </testsuites>
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./src</directory>
+        </whitelist>
+    </filter>
 </phpunit>