diff --git a/cocos/renderer/ccShader_UI_Gray.frag b/cocos/renderer/ccShader_UI_Gray.frag
index 0824470a6b..b20508f80d 100644
--- a/cocos/renderer/ccShader_UI_Gray.frag
+++ b/cocos/renderer/ccShader_UI_Gray.frag
@@ -10,7 +10,6 @@ const char* ccPositionTexture_GrayScale_frag = STRINGIFY(
 \nvoid main(void)\n
 \n{\n
 	\nvec4 c = texture2D(CC_Texture0, v_texCoord);\n
-    \n c = v_fragmentColor * c; \n
 	\ngl_FragColor.xyz = vec3(0.2126*c.r + 0.7152*c.g + 0.0722*c.b);\n
 	\ngl_FragColor.w = c.w;\n
 \n}\n
diff --git a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIScale9SpriteTest.cpp b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIScale9SpriteTest.cpp
index ff238a58d5..dd5628d656 100644
--- a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIScale9SpriteTest.cpp
+++ b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIScale9SpriteTest.cpp
@@ -59,7 +59,6 @@ UIScale9SpriteTests::UIScale9SpriteTests()
     ADD_TEST_CASE(UIS9ToggleRenderingTypeTest);
     ADD_TEST_CASE(UIS9GlobalZOrderTest);
     ADD_TEST_CASE(UIS9EnableScale9FalseTest);
-    ADD_TEST_CASE(UIS9GrayStateOpacityTest);
 }
 
 // UIScale9SpriteTest
@@ -1141,52 +1140,3 @@ bool UIS9EnableScale9FalseTest::init()
     return false;
 }
 
-bool UIS9GrayStateOpacityTest::init()
-{
-    if (UIScene::init()) {
-        
-        auto winSize = Director::getInstance()->getWinSize();
-        float x = winSize.width / 2;
-        float y = 0 + (winSize.height / 2 + 10);
-        
-        auto label = Label::createWithSystemFont("Drap slider to change opacity of the scale9Sprite", "Arial", 15);
-        label->setPosition(Vec2(winSize.width/2, winSize.height - 60));
-        this->addChild(label);
-        
-        auto blocks = ui::Scale9Sprite::create("Images/blocks9.png");
-        
-        blocks->setPosition(Vec2(x, y));
-        blocks->setPreferredSize(Size(96*2, 96*1.5));
-        blocks->setOpacity(100);
-        blocks->setState(Scale9Sprite::State::GRAY);
-        blocks->setGlobalZOrder(1);
-        blocks->setName("GrayScale9");
-        this->addChild(blocks);
-        
-        Slider* slider = Slider::create();
-        slider->loadBarTexture("cocosui/sliderTrack.png");
-        slider->loadSlidBallTextures("cocosui/sliderThumb.png", "cocosui/sliderThumb.png", "");
-        slider->loadProgressBarTexture("cocosui/sliderProgress.png");
-        slider->setContentSize(Size(300, slider->getContentSize().height * 1.5));
-        slider->setMaxPercent(100);
-        slider->setPercent(100 * 100.0 / 255.0);
-        slider->setPosition(Vec2(winSize.width / 2.0f, winSize.height / 2.0f - 100));
-        slider->addEventListener(CC_CALLBACK_2(UIS9GrayStateOpacityTest::sliderEvent, this));
-        _uiLayer->addChild(slider);
-
-        return true;
-    }
-    return false;
-}
-
-void UIS9GrayStateOpacityTest::sliderEvent(cocos2d::Ref *sender, cocos2d::ui::Slider::EventType type)
-{
-    if (type == Slider::EventType::ON_PERCENTAGE_CHANGED)
-    {
-        Slider* slider = dynamic_cast<Slider*>(sender);
-        int percent = slider->getPercent();
-        int maxPercent = slider->getMaxPercent();
-        auto scale9Sprite = (Scale9Sprite*)this->getChildByName("GrayScale9");
-        scale9Sprite->setOpacity(1.0 * percent / maxPercent * 255.0);
-    }
-}
\ No newline at end of file
diff --git a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIScale9SpriteTest.h b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIScale9SpriteTest.h
index 927499b528..11042a7990 100644
--- a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIScale9SpriteTest.h
+++ b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIScale9SpriteTest.h
@@ -311,13 +311,4 @@ public:
     virtual bool init() override;
 };
 
-class UIS9GrayStateOpacityTest: public UIScene
-{
-public:
-    CREATE_FUNC(UIS9GrayStateOpacityTest);
-    void sliderEvent(cocos2d::Ref* sender, cocos2d::ui::Slider::EventType type);
-
-    virtual bool init() override;
-};
-
 #endif /* defined(__cocos2d_tests__UIScale9SpriteTest__) */