diff --git a/psalm.xml b/psalm.xml
index a4a3016..12db8e1 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -14,6 +14,7 @@
         </ignoreFiles>
     </projectFiles>
     <issueHandlers>
+        <MissingClassConstType errorLevel="suppress" />
         <InvalidReturnType>
             <errorLevel type="suppress">
                 <directory name="src/Testing/" />