diff --git a/appveyor.yml b/appveyor.yml
index 549974b2499..b5fe251f30a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -32,7 +32,7 @@ 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"
   - ps: $PSVersionTable.PSVersion
-  - ps: Install-Module Pester -Force -Scope CurrentUser
+  - ps: Install-Module -Name Pester -Force -Scope CurrentUser
 build_script:
   - dotnet --info
   # build C# aspnetcore 5.0 server