diff --git a/build.ps1 b/build.ps1
index 2e1aa2e..60945d5 100644
--- a/build.ps1
+++ b/build.ps1
@@ -84,28 +84,18 @@ if ($Bootstrap) {
         ErrorAction = 'Stop'
     }
 
-    $importSucceeded = $false
-    try {
-        Invoke-PSDepend @psDependParameters
-        $importSucceeded = $true
-        Write-Verbose 'Successfully imported existing modules.' -Verbose
-    } catch {
-        Write-Verbose "Could not import all required modules: $_" -Verbose
-        Write-Verbose 'Attempting to install missing or outdated dependencies...' -Verbose
-    }
+    $psDependTestParameters = $psDependParameters.Clone()
+    $null = $psDependTestParameters.Remove('Import')
+    $psDependTestParameters['Test'] = $true
+    $psDependTestParameters['Quiet'] = $true
 
-    if (-not $importSucceeded) {
-        try {
-            Invoke-PSDepend @psDependParameters -Install
-        } catch {
-            Write-Error "Failed to install and import required dependencies: $_"
-            Write-Error 'This may be due to locked module files. Please restart the build environment or clear module locks.'
-            if ($_.Exception.InnerException) {
-                Write-Error "Inner exception: $($_.Exception.InnerException.Message)"
-            }
-            throw
-        }
+    if (-not (Invoke-PSDepend @psDependTestParameters)) {
+        $psDependInstallParameters = $psDependParameters.Clone()
+        $null = $psDependInstallParameters.Remove('Import')
+        Invoke-PSDepend @psDependInstallParameters -Install
     }
+
+    Invoke-PSDepend @psDependParameters
 } else {
     if (-not (Get-Module -Name 'PSDepend' -ListAvailable)) {
         throw 'Missing dependencies. Please run with the "-Bootstrap" flag to install dependencies.'
diff --git a/requirements.psd1 b/requirements.psd1
index e401e1c..0526ea7 100644
--- a/requirements.psd1
+++ b/requirements.psd1
@@ -6,7 +6,7 @@
     Target = 'CurrentUser'
   }
   'Pester' = @{
-    Version = '5.7.1'
+    Version = '6.2.0'
     Parameters = @{
       SkipPublisherCheck = $true
     }
diff --git a/tests/Get-PlasterManifestPathForCulture.Tests.ps1 b/tests/Get-PlasterManifestPathForCulture.Tests.ps1
index 40be779..2938897 100644
--- a/tests/Get-PlasterManifestPathForCulture.Tests.ps1
+++ b/tests/Get-PlasterManifestPathForCulture.Tests.ps1
@@ -39,6 +39,7 @@ Describe 'Get-PlasterManifestPathForCulture' {
 
       It "falls back to invariant culture manifest if no specific match is found" {
         $culture = New-Object System.Globalization.CultureInfo("xx-XX")
+        Mock -CommandName 'Test-Path' -MockWith { $False }
         Mock -CommandName 'Test-Path' -MockWith { $False } -ParameterFilter { $Path -like "*en-US*" }
         Mock -CommandName 'Test-Path' -MockWith { $True } -ParameterFilter { $Path -like "*fr-FR*" }
         Mock -CommandName 'Test-Path' -MockWith { $True } -ParameterFilter { $Path -like "*plasterManifest.xml" }
diff --git a/tests/Help.tests.ps1 b/tests/Help.tests.ps1
index c9fc3e0..56fdc79 100644
--- a/tests/Help.tests.ps1
+++ b/tests/Help.tests.ps1
@@ -80,7 +80,7 @@ Describe "Test help for <_.Name>" -ForEach $commands {
         ($commandHelp.Examples.Example.Remarks | Select-Object -First 1).Text | Should -Not -BeNullOrEmpty
     }
 
-    It "Help link <_> is valid" -ForEach $helpLinks {
+    It "Help link <_> is valid" -ForEach $helpLinks -AllowNullOrEmptyForEach {
         (Invoke-WebRequest -Uri $_ -UseBasicParsing).StatusCode | Should -Be '200'
     }
 
@@ -115,7 +115,7 @@ Describe "Test help for <_.Name>" -ForEach $commands {
         }
     }
 
-    Context "Test <_> help parameter help for <commandName>" -ForEach $helpParameterNames {
+    Context "Test <_> help parameter help for <commandName>" -ForEach $helpParameterNames -AllowNullOrEmptyForEach {
 
         # Shouldn't find extra parameters in help.
         It "finds help parameter in code: <_>" {