diff --git a/appveyor.yml b/appveyor.yml
index febaf777b63..2f22bfc438b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,3 @@
-# for CI with appveyor.yml
-# Ref: https://www.yegor256.com/2015/01/10/windows-appveyor-maven.html
 version: '{branch}-{build}'
 image: Visual Studio 2017
 hosts:
@@ -33,6 +31,8 @@ install:
   - cmd: dir/w
   - 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"
+  - ps: $PSVersionTable.PSVersion
+  - ps: Install-Module Pester -Force -Scope CurrentUser
 build_script:
   - dotnet --info
   # build C# API client (netcore)
@@ -67,7 +67,17 @@ test_script:
 
   # generate all petstore clients (openapi3)
   - .\bin\openapi3\windows\run-all-petstore.cmd
-
+  # test ps pestore
+  - ps: |
+      $ErrorActionPreference = "Stop"
+      cd samples\client\petstore\powershell-experimental\
+      .\Build.ps1
+      Import-Module -Name '.\src\PSPetstore'
+      $Result = Invoke-Pester -PassThru
+      if ($Result.FailedCount -gt 0) {
+          $host.SetShouldExit($Result.FailedCount)
+          exit $Result.FailedCount
+      }
 cache:
   - C:\maven\
   - C:\gradle\
diff --git a/bin/utils/ensure-up-to-date b/bin/utils/ensure-up-to-date
index 775641dbccc..09a4614c9cf 100755
--- a/bin/utils/ensure-up-to-date
+++ b/bin/utils/ensure-up-to-date
@@ -84,6 +84,7 @@ declare -a samples=(
 "${root}/bin/typescript-redux-query-petstore-with-npm-version.sh"
 "${root}/bin/cpp-restsdk-petstore.sh"
 "${root}/bin/cpp-qt5-qhttpengine-server-petstore.sh"
+"${root}/bin/openapi3/powershell-experimental-petstore.sh"
 )
 
 # Some special case generators may expect to be run as a stanalone process (e.g. modifying classpath)