diff --git a/MSVC/MyTinySTL_VS2015.vcxproj b/MSVC/MyTinySTL_VS2015.vcxproj
index aa70a5e..877ea81 100644
--- a/MSVC/MyTinySTL_VS2015.vcxproj
+++ b/MSVC/MyTinySTL_VS2015.vcxproj
@@ -22,33 +22,33 @@
     <ProjectGuid>{E88807F6-B07C-4371-BD38-FB1569F894E4}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>MyTinySTL</RootNamespace>
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
     <ProjectName>MyTinySTL</ProjectName>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
diff --git a/Test/test.cpp b/Test/test.cpp
index 67c795f..287b3ea 100644
--- a/Test/test.cpp
+++ b/Test/test.cpp
@@ -45,6 +45,8 @@ int main()
   unordered_set_test::unordered_multiset_test();
   string_test::string_test();
 
+  //测试
+
 #if defined(_MSC_VER) && defined(_DEBUG)
   _CrtDumpMemoryLeaks();
 #endif // check memory leaks