diff --git a/README.md b/README.md
index 6d97b01..cce77d0 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,9 @@
   <a href="https://ci.appveyor.com/project/uranium62/xxhash">
     <img src="https://ci.appveyor.com/api/projects/status/j5gkm2rvxwu4gu3q?svg=true" alt="build" />
   </a>
+  <a href="https://codecov.io/gh/uranium62/xxHash">
+    <img src="https://codecov.io/gh/uranium62/xxHash/branch/master/graph/badge.svg" alt="coverage"/>
+  </a>
   <a href="https://github.com/uranium62/xxHash/blob/master/LICENSE">
     <img src="https://img.shields.io/badge/License-MIT-yellow.svg" alt="license" />
   </a>
diff --git a/appveyor.yml b/appveyor.yml
index db94120..bb6c3e6 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -2,6 +2,10 @@ version: xxHash-{branch}-{build}
 
 test: off
 
+before_build:
+  - choco install opencover.portable
+  - choco install codecov
+
 install:
   - ps: $env:DOTNET_BUILD_VERSION = $env:APPVEYOR_BUILD_NUMBER
   
@@ -9,4 +13,8 @@ build_script:
   - cmd: build.cmd
   
 artifacts:
-  - path: artifacts\*.nupkg
\ No newline at end of file
+  - path: artifacts\*.nupkg
+  
+test_script:
+  - OpenCover.Console.exe -register:user -target:"dotnet.exe" -targetargs:"test src/Standart.Hash.xxHash.Test" -output:coverage.xml -oldstyle -filter:"+[Standart*]* -[*.Test]*"
+  - codecov -f "coverage.xml"
\ No newline at end of file
diff --git a/src/Standart.Hash.xxHash.Test/Standart.Hash.xxHash.Test.csproj b/src/Standart.Hash.xxHash.Test/Standart.Hash.xxHash.Test.csproj
index cfa3709..7dfc6d9 100644
--- a/src/Standart.Hash.xxHash.Test/Standart.Hash.xxHash.Test.csproj
+++ b/src/Standart.Hash.xxHash.Test/Standart.Hash.xxHash.Test.csproj
@@ -3,6 +3,7 @@
   <PropertyGroup>
     <IsPackable>false</IsPackable>
     <TargetFramework>netcoreapp2.0</TargetFramework>
+    <DebugType>full</DebugType>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <Optimize>true</Optimize>
diff --git a/src/Standart.Hash.xxHash/Standart.Hash.xxHash.csproj b/src/Standart.Hash.xxHash/Standart.Hash.xxHash.csproj
index 5b8cf44..dc2d24c 100644
--- a/src/Standart.Hash.xxHash/Standart.Hash.xxHash.csproj
+++ b/src/Standart.Hash.xxHash/Standart.Hash.xxHash.csproj
@@ -9,6 +9,7 @@
     <Optimize>false</Optimize>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>full</DebugType>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="System.Buffers" Version="$(SystemBuffers)" />