diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 1cd9938..8e7279e 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -6,11 +6,7 @@
          colors="true">
     <filter>
         <whitelist>
-            <directory>./</directory>
-            <exclude>
-                <directory>tests</directory>
-                <directory>vendor</directory>
-            </exclude>
+            <directory>./src</directory>
         </whitelist>
     </filter>
     <testsuites>