diff --git a/appveyor.yml b/appveyor.yml
index 9b6042162b79..5fad62b9aa5f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -23,6 +23,9 @@ install:
   - git clone https://github.com/wing328/swagger-samples
   - ps: Start-Process -FilePath 'C:\maven\apache-maven-3.2.5\bin\mvn' -ArgumentList 'jetty:run' -WorkingDirectory "$env:appveyor_build_folder\swagger-samples\java\java-jersey-jaxrs-ci"
 build_script:
+  # build C# API client (refactor)
+  - nuget restore samples\client\petstore\csharp-refactor\OpenAPIClient\Org.OpenAPITools.sln
+  - msbuild samples\client\petstore\csharp-refactor\OpenAPIClient\Org.OpenAPITools.sln /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
   # build C# API client
   - nuget restore samples\client\petstore\csharp\OpenAPIClient\Org.OpenAPITools.sln
   - msbuild samples\client\petstore\csharp\OpenAPIClient\Org.OpenAPITools.sln /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
@@ -37,6 +40,8 @@ build_script:
 test_script:
   # restore test-related files
   - copy /b/v/y CI\samples.ci\client\petstore\csharp\OpenAPIClient\src\Org.OpenAPITools.Test\Org.OpenAPITools.Test.csproj samples\client\petstore\csharp\OpenAPIClient\src\Org.OpenAPITools.Test\Org.OpenAPITools.Test.csproj
+  # test c# API client (refactor)
+  - nunit-console samples\client\petstore\csharp-refactor\OpenAPIClient\src\Org.OpenAPITools.Test\bin\Debug\Org.OpenAPITools.Test.dll --result=myresults.xml;format=AppVeyor
   # test c# API client
   - nunit-console samples\client\petstore\csharp\OpenAPIClient\src\Org.OpenAPITools.Test\bin\Debug\Org.OpenAPITools.Test.dll --result=myresults.xml;format=AppVeyor
   # test c# API client (with PropertyChanged)