diff --git a/src/EasySms.php b/src/EasySms.php
index 7fa0a17366f60902a5693635d3d9a52a3cea3b6e..e1a5203bfd42a796f34c0f890e19c6d5a9e8c409 100644
--- a/src/EasySms.php
+++ b/src/EasySms.php
@@ -83,7 +83,7 @@ class EasySms
     /**
      * Create a gateway.
      *
-     * @param string $name
+     * @param string|null $name
      *
      * @return \Overtrue\EasySms\Contracts\GatewayInterface
      */
@@ -103,7 +103,9 @@ class EasySms
      *
      * @param string|null $strategy
      *
-     * @return StrategyInterface
+     * @return \Overtrue\EasySms\Contracts\StrategyInterface
+     *
+     * @throws \Overtrue\EasySms\Exceptions\InvalidArgumentException
      */
     public function strategy($strategy = null)
     {
diff --git a/tests/EasySmsTest.php b/tests/EasySmsTest.php
index d6c6c26c85425315c7b5e66a3067bd31ee1bd7bf..2a96f6fc939b12ff57bc971a325e1698be59e842 100644
--- a/tests/EasySmsTest.php
+++ b/tests/EasySmsTest.php
@@ -9,10 +9,10 @@
 
 namespace Overtrue\EasySms\Tests;
 
-use Overtrue\EasySms\Exceptions\InvalidArgumentException;
 use Overtrue\EasySms\Contracts\GatewayInterface;
 use Overtrue\EasySms\Contracts\MessageInterface;
 use Overtrue\EasySms\EasySms;
+use Overtrue\EasySms\Exceptions\InvalidArgumentException;
 use Overtrue\EasySms\Message;
 use Overtrue\EasySms\Messenger;
 use Overtrue\EasySms\Support\Config;