diff --git a/eng/common/scripts/Helpers/PSModule-Helpers.ps1 b/eng/common/scripts/Helpers/PSModule-Helpers.ps1
index 96f34ff71f4a..fae40d650e4f 100644
--- a/eng/common/scripts/Helpers/PSModule-Helpers.ps1
+++ b/eng/common/scripts/Helpers/PSModule-Helpers.ps1
@@ -48,8 +48,15 @@ function Update-PSModulePath()
 }
 
 # If we want to use another default repository other then PSGallery we can update the default parameters
-function Install-ModuleIfNotInstalled($moduleName, $version, $repositoryUrl = $DefaultPSRepositoryUrl)
+function Install-ModuleIfNotInstalled()
 {
+  [CmdletBinding(SupportsShouldProcess = $true)]
+  param(
+    [string]$moduleName,
+    [string]$version,
+    [string]$repositoryUrl = $DefaultPSRepositoryUrl
+  )
+
   # Check installed modules
   $modules = (Get-Module -ListAvailable $moduleName)
   if ($version -as [Version]) {
@@ -94,4 +101,4 @@ function Install-ModuleIfNotInstalled($moduleName, $version, $repositoryUrl = $D
   return $modules[0]
 }
 
-Update-PSModulePath
\ No newline at end of file
+Update-PSModulePath
diff --git a/eng/common/scripts/common.ps1 b/eng/common/scripts/common.ps1
index c472d180341c..73fe5b7d0393 100644
--- a/eng/common/scripts/common.ps1
+++ b/eng/common/scripts/common.ps1
@@ -54,4 +54,4 @@ $GetOnboardedDocsMsPackagesForMonikerFn = "Get-${Language}-OnboardedDocsMsPackag
 $GetDocsMsTocDataFn = "Get-${Language}-DocsMsTocData"
 $GetDocsMsTocChildrenForManagementPackagesFn = "Get-${Language}-DocsMsTocChildrenForManagementPackages"
 $UpdateDocsMsTocFn = "Get-${Language}-UpdatedDocsMsToc"
-$GetPackageLevelReadmeFn = "Get-${Language}-PackageLevelReadme"
\ No newline at end of file
+$GetPackageLevelReadmeFn = "Get-${Language}-PackageLevelReadme"
diff --git a/eng/common/scripts/stress-testing/deploy-stress-tests.ps1 b/eng/common/scripts/stress-testing/deploy-stress-tests.ps1
index f4da78bd5225..01920bdcbfe1 100644
--- a/eng/common/scripts/stress-testing/deploy-stress-tests.ps1
+++ b/eng/common/scripts/stress-testing/deploy-stress-tests.ps1
@@ -21,7 +21,10 @@ param(
     [switch] $CI = ($null -ne $env:SYSTEM_TEAMPROJECTID),
 
     # Optional namespace override, otherwise the shell user or chart annotation will be used
-    [string]$Namespace
+    [string]$Namespace,
+
+    # Override remote stress-test-addons with local on-disk addons for development
+    [System.IO.FileInfo]$LocalAddonsPath
 )
 
 . $PSScriptRoot/stress-test-deployment-lib.ps1
diff --git a/eng/common/scripts/stress-testing/find-all-stress-packages.ps1 b/eng/common/scripts/stress-testing/find-all-stress-packages.ps1
index 3456cee68951..24c27da485f0 100644
--- a/eng/common/scripts/stress-testing/find-all-stress-packages.ps1
+++ b/eng/common/scripts/stress-testing/find-all-stress-packages.ps1
@@ -9,6 +9,7 @@ class StressTestPackageInfo {
     [string]$ReleaseName
     [string]$Dockerfile
     [string]$DockerBuildDir
+    [string]$Deployer
 }
 
 function FindStressPackages(
@@ -50,6 +51,17 @@ function MatchesAnnotations([hashtable]$chart, [hashtable]$filters) {
     return $true
 }
 
+function GetUsername() {
+    # Check GITHUB_USER for users in codespaces environments, since the default user is `codespaces` and
+    # we would like to avoid namespace overlaps for different codespaces users.
+    $stressUser = $env:GITHUB_USER ?? $env:USER ?? $env:USERNAME
+    # Remove spaces, underscores, etc. that may be in $namespace.
+    # Value must be a valid RFC 1123 DNS label: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-label-names
+    $stressUser = $stressUser -replace '_|\W', '-'
+
+    return $stressUser.ToLower()
+}
+
 function NewStressTestPackageInfo(
     [hashtable]$chart,
     [System.IO.FileInfo]$chartFile,
@@ -61,18 +73,7 @@ function NewStressTestPackageInfo(
     } elseif ($CI) {
         $chart.annotations.namespace
     } else {
-        # Check GITHUB_USER for users in codespaces environments, since the default user is `codespaces` and
-        # we would like to avoid namespace overlaps for different codespaces users.
-        $namespace = if ($env:GITHUB_USER) {
-            $env:GITHUB_USER
-        } elseif ($env:USER) {
-            $env:USER
-        } else {
-            $env:USERNAME
-        }
-        # Remove spaces, underscores, etc. that may be in $namespace. Value must be a valid RFC 1123 DNS label:
-        # https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-label-names
-        $namespace -replace '_|\W', '-'
+        GetUsername
     }
 
     return [StressTestPackageInfo]@{
diff --git a/eng/common/scripts/stress-testing/stress-test-deployment-lib.ps1 b/eng/common/scripts/stress-testing/stress-test-deployment-lib.ps1
index da91279fd63b..0b57f1fb9338 100644
--- a/eng/common/scripts/stress-testing/stress-test-deployment-lib.ps1
+++ b/eng/common/scripts/stress-testing/stress-test-deployment-lib.ps1
@@ -67,11 +67,18 @@ function DeployStressTests(
     [string]$repository = '',
     [switch]$pushImages,
     [string]$clusterGroup = '',
-    [string]$deployId = 'local',
+    [string]$deployId = '',
     [switch]$login,
     [string]$subscription = '',
     [switch]$CI,
-    [string]$Namespace
+    [string]$Namespace,
+    [ValidateScript({
+        if (!(Test-Path $_)) {
+            throw "LocalAddonsPath $LocalAddonsPath does not exist"
+        }
+        return $true
+    })]
+    [System.IO.FileInfo]$LocalAddonsPath
 ) {
     if ($environment -eq 'test') {
         if ($clusterGroup -or $subscription) {
@@ -94,10 +101,21 @@ function DeployStressTests(
         Login -subscription $subscription -clusterGroup $clusterGroup -pushImages:$pushImages
     }
 
-    RunOrExitOnFailure helm repo add stress-test-charts https://stresstestcharts.blob.core.windows.net/helm/
+    $chartRepoName = 'stress-test-charts'
+    if ($LocalAddonsPath) {
+        $absAddonsPath = Resolve-Path $LocalAddonsPath
+        if (!(helm plugin list | Select-String 'file')) {
+            RunOrExitOnFailure helm plugin add (Join-Path $absAddonsPath file-plugin)
+        }
+        RunOrExitOnFailure helm repo add --force-update $chartRepoName file://$absAddonsPath
+    } else {
+        RunOrExitOnFailure helm repo add --force-update $chartRepoName https://stresstestcharts.blob.core.windows.net/helm/
+    }
+
     Run helm repo update
     if ($LASTEXITCODE) { return $LASTEXITCODE }
 
+    $deployer = if ($deployId) { $deployId } else { GetUsername }
     $pkgs = FindStressPackages -directory $searchDirectory -filters $filters -CI:$CI -namespaceOverride $Namespace
     Write-Host "" "Found $($pkgs.Length) stress test packages:"
     Write-Host $pkgs.Directory ""
@@ -105,15 +123,15 @@ function DeployStressTests(
         Write-Host "Deploying stress test at '$($pkg.Directory)'"
         DeployStressPackage `
             -pkg $pkg `
-            -deployId $deployId `
+            -deployId $deployer `
             -environment $environment `
             -repositoryBase $repository `
             -pushImages:$pushImages `
             -login:$login
     }
 
-    Write-Host "Releases deployed by $deployId"
-    Run helm list --all-namespaces -l deployId=$deployId
+    Write-Host "Releases deployed by $deployer"
+    Run helm list --all-namespaces -l deployId=$deployer
 
     if ($FailedCommands) {
         Write-Warning "The following commands failed:"