diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index fed3d0109..9ade7d63c 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -3,6 +3,7 @@
 <!-- https://docs.phpunit.de/en/11.5/configuration.html -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         failOnDeprecation="true"
          failOnNotice="true"
          failOnWarning="true"
          colors="true"
@@ -21,11 +22,16 @@
         </testsuite>
     </testsuites>
 
-    <source>
+    <source ignoreSuppressionOfDeprecations="true"
+            ignoreIndirectDeprecations="true"
+    >
         <include>
             <directory suffix=".php">src</directory>
         </include>
 
+        <deprecationTrigger>
+            <function>trigger_deprecation</function>
+        </deprecationTrigger>
     </source>
 
     <extensions>