diff --git a/.travis.yml b/.travis.yml
index 0ceeacd..833dc58 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,5 @@
 language: php
 php:
-  - '7.1'
   - '7.2'
 
 before_script:
diff --git a/src/Shrimp/ShrimpWechat.php b/src/Shrimp/ShrimpWechat.php
index af557d2..b1a8be3 100644
--- a/src/Shrimp/ShrimpWechat.php
+++ b/src/Shrimp/ShrimpWechat.php
@@ -105,6 +105,16 @@ public function __construct($appId, $secret, $bindAccessTokenCallable = true, $c
         self::$dispatcher = new EventDispatcher();
     }
 
+    /**
+     * 获取事件调度器
+     *
+     * @return EventDispatcher|null
+     */
+    public function getDispatcher(): ?EventDispatcher
+    {
+        return self::$dispatcher;
+    }
+
     /**
      * @param string $accessToken
      * @param int $expire
diff --git a/tests/MaterialTest.php b/tests/MaterialTest.php
index 871f5ba..fb8ddc7 100644
--- a/tests/MaterialTest.php
+++ b/tests/MaterialTest.php
@@ -32,16 +32,15 @@ public function __construct($name = null, array $data = [], $dataName = '')
 
     /**
      * 测试上传图片
+     *
      * @throws Exception
+     * @expectedException Exception
      */
     public function testUploadFile()
     {
-        try {
-            $file = new MediaFile(dirname(__DIR__) . '/example.png');
-            $result = $this->sdk->material->uploadMaterialImage($file);
-            $this->assertCount(1, $result);
-        } catch (\Exception $e) {
-        }
+        $file = new MediaFile(dirname(__DIR__) . '/example.png');
+        $result = $this->sdk->material->uploadMaterialImage($file);
+        self::assertCount(1, $result);
     }
 
     /**
@@ -50,14 +49,12 @@ public function testUploadFile()
      * @param array $content
      * @param MediaFile $file
      * @throws Exception
+     * @expectedException Exception
      */
     public function testCreatePictureContent(array $content, MediaFile $file)
     {
-        try {
-            $result = $this->sdk->material->createPictureContent($content, $file);
-            $this->assertArrayHasKey('media_id', $result);
-        } catch (Exception $e) {
-        }
+        $result = $this->sdk->material->createPictureContent($content, $file);
+        self::assertArrayHasKey('media_id', $result);
     }
 
 
diff --git a/tests/MenuTest.php b/tests/MenuTest.php
index 3b6beb2..b56069f 100644
--- a/tests/MenuTest.php
+++ b/tests/MenuTest.php
@@ -30,10 +30,11 @@ public function __construct($name = null, array $data = [], $dataName = '')
 
     /**
      * @throws Exception
+     * @expectedException Exception
      */
     public function testMenuQuery()
     {
         $menu = $this->sdk->menu->menuQuery();
-        $this->assertArrayHasKey('menu', $menu);
+        self::assertArrayHasKey('menu', $menu);
     }
 }
diff --git a/tests/MessageTest.php b/tests/MessageTest.php
index 46b9a09..4cde462 100644
--- a/tests/MessageTest.php
+++ b/tests/MessageTest.php
@@ -35,15 +35,12 @@ public function __construct($name = null, array $data = [], $dataName = '')
      *
      * @param $mediaId
      * @throws Exception
+     * @expectedException Exception
      */
     public function testMassForTag($mediaId)
     {
-        try {
-            $result = $this->sdk->message->massForTag($mediaId, Message::TYPE_NEWS);
-            $this->assertArrayHasKey('msg_id', $result);
-        } catch (Exception $e) {
-            $this->assertContains("no permission for this msgtype hint", $e->getMessage());
-        }
+        $result = $this->sdk->message->massForTag($mediaId, Message::TYPE_NEWS);
+        self::assertArrayHasKey('msg_id', $result);
     }
 
     /**
diff --git a/tests/UserTest.php b/tests/UserTest.php
index bed0a8b..d4ba5ed 100644
--- a/tests/UserTest.php
+++ b/tests/UserTest.php
@@ -30,23 +30,25 @@ public function __construct($name = null, array $data = [], $dataName = '')
 
     /**
      * @throws Exception
+     * @expectedException Exception
      */
     public function testCreateLabel()
     {
         $name = "Test" . range('a', 'z')[mt_rand(0, 25)] . mt_rand(1, 100);
         $label = $this->sdk->user->createLabel($name);
-        $this->assertArrayHasKey('tag', $label);
+        self::assertArrayHasKey('tag', $label);
         $name = "Update" . range('a', 'z')[mt_rand(0, 25)] . mt_rand(1, 100);
-        $this->assertArrayHasKey('errcode', $this->sdk->user->updateLabel($label['tag']['id'], $name));
+        self::assertArrayHasKey('errcode', $this->sdk->user->updateLabel($label['tag']['id'], $name));
     }
 
 
     /**
      * @throws Exception
+     * @expectedException Exception
      */
     public function testGetLabel()
     {
         $tags = $this->sdk->user->getLabel();
-        $this->assertArrayHasKey('tags', $tags);
+        self::assertArrayHasKey('tags', $tags);
     }
 }