diff --git a/src/Illuminate/Testing/TestResponse.php b/src/Illuminate/Testing/TestResponse.php
index cce3584f4d0b..1577c65fcb6e 100644
--- a/src/Illuminate/Testing/TestResponse.php
+++ b/src/Illuminate/Testing/TestResponse.php
@@ -1691,8 +1691,10 @@ public function assertSessionHasErrorsIn($errorBag, $keys = [], $format = null)
     /**
      * Assert that the session does not have a given key.
      *
-     * @param  string|array  $key
-     * @param  mixed  $value
+     * @template T of (\Closure(mixed): bool)|mixed
+     *
+     * @param  string|T[]  $key
+     * @param  T  $value
      * @return $this
      */
     public function assertSessionMissing($key, $value = null)