diff --git a/psalm.xml b/psalm.xml
index 677e8d4..8c787d1 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -7,7 +7,8 @@
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
 >
     <projectFiles>
-        <directory name="lib/Doctrine/Inflector" />
+        <directory name="lib" />
+        <directory name="tests" />
         <ignoreFiles>
             <directory name="vendor" />
         </ignoreFiles>