diff --git a/eng/common/pipelines/templates/steps/run-pester-tests.yml b/eng/common/pipelines/templates/steps/run-pester-tests.yml
index 67372bdb73b0..38609001743c 100644
--- a/eng/common/pipelines/templates/steps/run-pester-tests.yml
+++ b/eng/common/pipelines/templates/steps/run-pester-tests.yml
@@ -14,8 +14,14 @@ parameters:
 steps:
 
   - pwsh: |
-       Install-Module -Name Pester -Force
-    displayName: Install Pester
+       . (Join-Path "$(Build.SourcesDirectory)" eng common scripts Helpers PSModule-Helpers.ps1)
+       Install-ModuleIfNotInstalled "Pester" "5.7.1" | Import-Module
+
+       # Test: install powershell-yaml from internal feed (upstream to PSGallery)
+       $m = Install-ModuleIfNotInstalled "powershell-yaml" "0.4.1"
+       Write-Host "Installed powershell-yaml version: $($m.Version)"
+       $m | Import-Module
+    displayName: Install Pester and test modules
 
    # default test steps
   - ${{ if eq(length(parameters.CustomTestSteps), 0) }}:
diff --git a/eng/common/scripts/Helpers/PSModule-Helpers.ps1 b/eng/common/scripts/Helpers/PSModule-Helpers.ps1
index f79ce1a5214b..8293e5cf00c9 100644
--- a/eng/common/scripts/Helpers/PSModule-Helpers.ps1
+++ b/eng/common/scripts/Helpers/PSModule-Helpers.ps1
@@ -47,20 +47,10 @@ function Update-PSModulePathForCI() {
 }
 
 function Get-ModuleRepositories([string]$moduleName) {
-  $DefaultPSRepositoryUrl = "https://www.powershellgallery.com/api/v2"
-  # List of modules+versions we want to replace with internal feed sources for reliability, security, etc.
-  $packageFeedOverrides = @{
-    'powershell-yaml' = 'https://pkgs.dev.azure.com/azure-sdk/public/_packaging/azure-sdk-tools/nuget/v2'
-  }
-
-  $repoUrls = if ($packageFeedOverrides.Contains("${moduleName}")) {
-    @($packageFeedOverrides["${moduleName}"], $DefaultPSRepositoryUrl)
-  }
-  else {
-    @($DefaultPSRepositoryUrl)
-  }
+  # Use internal Azure Artifacts feed only.
+  $InternalPSRepositoryUrl = "https://pkgs.dev.azure.com/azure-sdk/public/_packaging/azure-sdk-tools/nuget/v2"
 
-  return $repoUrls
+  return @($InternalPSRepositoryUrl)
 }
 
 function moduleIsInstalled([string]$moduleName, [string]$version) {
@@ -153,6 +143,7 @@ function Install-ModuleIfNotInstalled() {
 
     $repoUrls = Get-ModuleRepositories $moduleName
 
+    Write-Host "Module '$moduleName' with version '$version' is not installed. Attempting to install from $($repoUrls -join ", ")."
     foreach ($url in $repoUrls) {
       try {
         $module = installModule -moduleName $moduleName -version $version -repoUrl $url
diff --git a/eng/common/scripts/Verify-Resource-Ref.ps1 b/eng/common/scripts/Verify-Resource-Ref.ps1
index 8669a2988342..f6c4d1b2dc0d 100644
--- a/eng/common/scripts/Verify-Resource-Ref.ps1
+++ b/eng/common/scripts/Verify-Resource-Ref.ps1
@@ -1,5 +1,6 @@
 . (Join-Path $PSScriptRoot common.ps1)
-Install-Module -Name powershell-yaml -RequiredVersion 0.4.7 -Force -Scope CurrentUser
+. (Join-Path $PSScriptRoot Helpers PSModule-Helpers.ps1)
+Install-ModuleIfNotInstalled "powershell-yaml" "0.4.7" | Import-Module
 $ymlfiles = Get-ChildItem $RepoRoot -recurse | Where-Object {$_ -like '*.yml'}
 $affectedRepos = [System.Collections.ArrayList]::new()
 
diff --git a/eng/scripts/Update-Artifacts-List-For-Patch-Release.ps1 b/eng/scripts/Update-Artifacts-List-For-Patch-Release.ps1
index 9a2de59bf5a5..642950b42f59 100644
--- a/eng/scripts/Update-Artifacts-List-For-Patch-Release.ps1
+++ b/eng/scripts/Update-Artifacts-List-For-Patch-Release.ps1
@@ -23,7 +23,7 @@ if (!(Test-Path $SourcesDirectory -PathType Container)) {
     exit 1
 }
 
-Install-ModuleIfNotInstalled "powershell-yaml" "0.4.1" | Import-Module
+Install-ModuleIfNotInstalled "powershell-yaml" "0.4.7" | Import-Module
 
 $artifactsDict = [ordered]@{}
 $addModulesDict  = [ordered]@{}
diff --git a/eng/versioning/pom_file_version_scanner.ps1 b/eng/versioning/pom_file_version_scanner.ps1
index ad1e5a6740a1..085dd6398f9c 100644
--- a/eng/versioning/pom_file_version_scanner.ps1
+++ b/eng/versioning/pom_file_version_scanner.ps1
@@ -61,7 +61,7 @@ if ($UseVerboseLogging) {
     Write-Host "SdkRoot=$SdkRoot"
 }
 
-Install-ModuleIfNotInstalled "powershell-yaml" "0.4.1" | Import-Module
+Install-ModuleIfNotInstalled "powershell-yaml" "0.4.7" | Import-Module
 
 $StartTime = $(get-date)