diff --git a/psalm.xml b/psalm.xml
index 0c410f26..39701f2b 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -19,4 +19,8 @@
         <pluginClass class="Psalm\PhpUnitPlugin\Plugin"/>
         <pluginClass class="Psalm\SymfonyPsalmPlugin\Plugin"/>
     </plugins>
+    
+    <issueHandlers>
+        <ClassMustBeFinal errorLevel="suppress"/> 
+    </issueHandlers>
 </psalm>
diff --git a/src/Configuration/ParallelConfiguration.php b/src/Configuration/ParallelConfiguration.php
index 61c7706c..70bec154 100644
--- a/src/Configuration/ParallelConfiguration.php
+++ b/src/Configuration/ParallelConfiguration.php
@@ -68,6 +68,9 @@ protected function tagEventSubscribers(ContainerBuilder $container): void
         }
     }
 
+    /**
+     * @psalm-suppress MixedArgument
+     */
     protected function loadCommandLineOptions(ContainerBuilder $containerBuilder, InputInterface $input): void
     {
         $containerBuilder->setParameter('paraunit.max_process_count', $input->getOption('parallel'));