diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..ef6c9c9
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,9 @@
+parameters:
+    level: 0
+    paths:
+        - .
+    excludePaths:
+        - vendor/*
+        - node_modules/*
+        - .git/*
+
diff --git a/test.php b/test.php
new file mode 100644
index 0000000..d1de98f
--- /dev/null
+++ b/test.php
@@ -0,0 +1,9 @@
+<?php declare(strict_types = 1);
+
+class HelloWorld
+{
+    public function sayHello(DateTimeImutable $date): void
+    {
+        echo 'Hello, ' . $date->format('j. n. Y');
+    }
+}