diff --git a/psalm.xml b/psalm.xml
index 0218b24a98..b1993aa307 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -8,6 +8,10 @@
 >
     <projectFiles>
         <directory name="src"/>
+
+        <file name="public/legacy.php"/>
+        <file name="public/main/inc/lib/api.lib.php"/>
+
         <directory name="public/main/admin" />
         <directory name="public/main/announcements"/>
         <directory name="public/main/attendance"/>
@@ -22,6 +26,8 @@
 <!--        <directory name="public/main/dropbox"/>-->
 <!--        <directory name="public/main/exercise"/>-->
         <file name="public/main/exercise/oral_expression.class.php"/>
+
+        <file name="public/main/exercise/TestCategory.php"/>
         <file name="public/main/exercise/exercise.class.php"/>
 
         <directory name="public/main/gradebook"/>
@@ -42,7 +48,7 @@
         <file name="public/main/inc/lib/agenda.lib.php"/>
         <file name="public/main/inc/lib/AnnouncementEmail.php"/>
         <file name="public/main/inc/lib/AnnouncementManager.php"/>
-        <file name="public/main/inc/lib/api.lib.php"/>
+
         <file name="public/main/inc/lib/array.lib.php"/>
         <file name="public/main/inc/lib/attendance.lib.php"/>
         <file name="public/main/inc/lib/auth.lib.php"/>