diff --git a/psalm/EventManagerCheck.php b/psalm/EventManagerCheck.php
new file mode 100644
index 00000000..52a30c01
--- /dev/null
+++ b/psalm/EventManagerCheck.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LaminasPsalm\EventManager;
+
+use ArrayObject;
+use Laminas\EventManager\EventManager;
+use LaminasPsalm\EventManager\Model\CheckObject;
+
+final class EventManagerCheck
+{
+    /** @return ArrayObject<string, CheckObject> */
+    public function prepareArgsReturnsObjectWithCorrectType(): ArrayObject
+    {
+        $params = [
+            'foo' => new CheckObject(),
+            'bar' => new CheckObject(),
+        ];
+
+        return (new EventManager())->prepareArgs($params);
+    }
+}
diff --git a/src/EventManager.php b/src/EventManager.php
index 99c31dee..33d6a2b6 100644
--- a/src/EventManager.php
+++ b/src/EventManager.php
@@ -261,8 +261,10 @@ public function clearListeners($eventName)
      * listener. It returns an ArrayObject of the arguments, which may then be
      * passed to trigger().
      *
-     * @param  array $args
-     * @return ArrayObject
+     * @template Tk of array-key
+     * @template Tv
+     * @param  array<Tk, Tv> $args
+     * @return ArrayObject<Tk, Tv>
      */
     public function prepareArgs(array $args)
     {