diff --git a/tests/IntegrationNtlmConfiguration.Tests.ps1 b/tests/IntegrationNtlmConfiguration.Tests.ps1
index f5e546e4..540f70d1 100644
--- a/tests/IntegrationNtlmConfiguration.Tests.ps1
+++ b/tests/IntegrationNtlmConfiguration.Tests.ps1
@@ -1,5 +1,7 @@
 # Composed #362/#363/#365 behavior, using mock registry/CIM and temporary journals only.
 $ErrorActionPreference = 'Stop'
+# Keep mocks in the same script scope as dot-sourced helpers/imported commands;
+# Windows PowerShell 5.1 resolves script-local originals ahead of global mocks.
 $repo = Split-Path $PSScriptRoot -Parent
 $script:ScriptRoot = $repo
 . (Join-Path $repo 'scripts/Configuration.ps1')
@@ -29,30 +31,30 @@ function Reset-Mocks($Outgoing = 0, $Domain = 2, $ProductType = 2) {
     $script:writes = 0; $script:readFails = $false; $script:writeFails = ''
     $script:roleFails = $false
 }
-function global:Get-CimInstance {
+function Get-CimInstance {
     param($ClassName, $Property, $Namespace, $ErrorAction)
     if ($ClassName -eq 'Win32_OperatingSystem') {
         if ($script:roleFails) { throw 'Mock role query failure' }
         return [pscustomobject]@{ ProductType = $script:productType }
     }
 }
-function global:Test-Path {
+function Test-Path {
     param($LiteralPath, $Path, $ErrorAction)
     $target = if ($LiteralPath) { $LiteralPath } else { $Path }
     if ($target -like 'HKLM:*') { return $true }
     Microsoft.PowerShell.Management\Test-Path -LiteralPath $target
 }
-function global:Get-ItemProperty {
+function Get-ItemProperty {
     param($LiteralPath, $ErrorAction)
     if ($script:readFails) { throw 'Mock registry read failure' }
     return [pscustomobject]$script:registry
 }
-function global:Get-WelaRegistryState {
+function Get-WelaRegistryState {
     param($Path, $Name)
     if ($script:readFails) { throw 'Mock registry read failure' }
     [pscustomobject]@{ KeyExists = $true; ValueExists = ($null -ne $script:registry[$Name]); Value = $script:registry[$Name]; Type = 'DWord' }
 }
-function global:Set-ItemProperty {
+function Set-ItemProperty {
     param($LiteralPath, $Name, $Value, $Type, $ErrorAction)
     # Assert the actual mutation cannot run before its matching journal entry.
     $journal = Join-Path $script:currentContext.BackupPath 'before.jsonl'
diff --git a/tests/IntegrationProfileConfiguration.Tests.ps1 b/tests/IntegrationProfileConfiguration.Tests.ps1
index e4188cf2..9fb75430 100644
--- a/tests/IntegrationProfileConfiguration.Tests.ps1
+++ b/tests/IntegrationProfileConfiguration.Tests.ps1
@@ -1,5 +1,7 @@
 # Profile command + verified configuration integration. No Windows policy is touched.
 $ErrorActionPreference = 'Stop'
+# Keep mocks in the same script scope as dot-sourced helpers/imported commands;
+# Windows PowerShell 5.1 resolves script-local originals ahead of global mocks.
 $repo = Split-Path $PSScriptRoot -Parent
 $script:ScriptRoot = $repo
 Import-Module (Join-Path $repo 'modules/AuditProfiles.psm1') -Force
@@ -44,16 +46,16 @@ function Reset-Run([string]$Profile = 'cis-win11-v4-l1', [switch]$DryRun) {
     $script:cleanup.Add($script:BackupPath)
     $script:cleanup.Add($script:ResultsPath)
 }
-function global:TestWindows { return $true }
-function global:TestAdministrator { return $true }
-function global:Get-WelaHostContext { [pscustomobject]@{ Role = 'Client'; Build = $script:hostBuild } }
-function global:Get-WelaEffectiveAuditPolicy { return $script:state.Clone() }
-function global:Get-WelaNativeAuditPolicy {
+function TestWindows { return $true }
+function TestAdministrator { return $true }
+function Get-WelaHostContext { [pscustomobject]@{ Role = 'Client'; Build = $script:hostBuild } }
+function Get-WelaEffectiveAuditPolicy { return $script:state.Clone() }
+function Get-WelaNativeAuditPolicy {
     param($Guid)
     if (-not $script:state.ContainsKey($Guid)) { throw "Mock missing policy: $Guid" }
     return $script:state[$Guid]
 }
-function global:Invoke-WelaNative {
+function Invoke-WelaNative {
     param($FilePath, $Arguments)
     if ($FilePath -ne 'auditpol.exe' -or $Arguments[0] -ne '/set') { throw 'Unexpected native mutation' }
     $guid = ($Arguments | Where-Object { $_ -like '/subcategory:*' }) -replace '^/subcategory:\{([^}]+)\}$', '$1'
diff --git a/tests/IntegrationSafety.Tests.ps1 b/tests/IntegrationSafety.Tests.ps1
index d655b9ac..a149dee4 100644
--- a/tests/IntegrationSafety.Tests.ps1
+++ b/tests/IntegrationSafety.Tests.ps1
@@ -1,6 +1,8 @@
 # Safety regressions use extracted dispatcher statements with stub mutators and mocked registry APIs.
 # Never dot-source WELA or invoke configure-sacl/update-rules implementations from this test.
 $ErrorActionPreference = 'Stop'
+# Keep mocks in the same script scope as dot-sourced helpers/imported commands;
+# Windows PowerShell 5.1 resolves script-local originals ahead of global mocks.
 $repo = Split-Path $PSScriptRoot -Parent
 $tokens = $null; $errors = $null
 $ast = [Management.Automation.Language.Parser]::ParseFile((Join-Path $repo 'WELA.ps1'), [ref]$tokens, [ref]$errors)
@@ -54,26 +56,26 @@ function New-RaceContext([switch]$Prompt) {
     $script:cleanup.Add($path)
     New-WelaConfigurationContext -Auto:(-not $Prompt) -BackupPath $path
 }
-function global:Get-WelaOutgoingNtlmState {
+function Get-WelaOutgoingNtlmState {
     # The first display is deliberately stale; the shared runner must trust its own fresh read.
     [pscustomobject]@{ Readable = $true; Value = 0; Description = 'Allow all (initial read)'; PolicySource = 'mock' }
 }
-function global:Get-WelaRegistryState {
+function Get-WelaRegistryState {
     param($Path, $Name)
     if ($script:journalWritten -and $script:prewriteReadFails) { throw 'Mock prewrite read failure' }
     [pscustomobject]@{ KeyExists = $true; ValueExists = $true; Value = $script:value; Type = $script:type }
 }
-function global:New-WelaRegistryKey { param($Path) }
-function global:Set-ItemProperty {
+function New-WelaRegistryKey { param($Path) }
+function Set-ItemProperty {
     param($LiteralPath, $Name, $Value, $Type, $ErrorAction)
     $script:value = $Value; $script:type = $Type; $script:writes++
 }
-function global:Read-Host {
+function Read-Host {
     param($Prompt)
     if ($null -ne $script:changeOnPrompt) { $script:value = $script:changeOnPrompt }
     return 'Y'
 }
-function global:Add-Content {
+function Add-Content {
     param($LiteralPath, $Value, $Encoding, $ErrorAction)
     process {
         # Preserve real temporary recovery files; only the mocked policy state changes.