diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d5b75aece..e339f52bb 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -192,8 +192,13 @@ jobs:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           persist-credentials: false
-      - name: Test generated Windows installer
-        shell: ${{ matrix.shell }}
+      - name: Test generated Windows installer (powershell)
+        if: matrix.shell == 'powershell'
+        shell: powershell
+        run: ./scripts/test-windows-installer.ps1
+      - name: Test generated Windows installer (pwsh)
+        if: matrix.shell == 'pwsh'
+        shell: pwsh
         run: ./scripts/test-windows-installer.ps1
   test-cli:
     if: always() && needs.detect-targets.outputs.run-cli == 'true'
diff --git a/scripts/test-windows-installer.ps1 b/scripts/test-windows-installer.ps1
index c95aa9d09..8428ca494 100644
--- a/scripts/test-windows-installer.ps1
+++ b/scripts/test-windows-installer.ps1
@@ -54,7 +54,12 @@ function Invoke-Installer {
     }
     $global:InstallerTestArchive = $Sandbox.Archive
     $global:InstallerTestDownloads = @()
-    & $InstallerPath *>&1 | ForEach-Object { "$_" }
+    $global:InstallerTestOutput = @()
+    & $InstallerPath *>&1 | ForEach-Object {
+        $line = "$_"
+        $global:InstallerTestOutput += $line
+        $line
+    }
 }
 
 function global:Invoke-RestMethod {
@@ -67,6 +72,8 @@ function global:Invoke-WebRequest {
     Copy-Item -LiteralPath $global:InstallerTestArchive -Destination $OutFile
 }
 
+Import-Module Microsoft.PowerShell.Archive
+
 $global:InstallerTestOpenHandle = $null
 function global:Expand-Archive {
     param([string]$Path, [string]$DestinationPath, [switch]$Force)
@@ -77,6 +84,7 @@ function global:Expand-Archive {
     }
 }
 
+$global:InstallerTestOutput = @()
 try {
     Write-Host '--- install succeeds and cleans up'
     $global:InstallerTestHoldExtractedBinary = $false
@@ -106,6 +114,11 @@ try {
         Write-Host '--- skipping held-file cleanup case: open files can be deleted on this platform'
     }
 }
+catch {
+    Write-Host '--- installer output'
+    $global:InstallerTestOutput | ForEach-Object { Write-Host "  $_" }
+    throw
+}
 finally {
     if ($global:InstallerTestOpenHandle) {
         $global:InstallerTestOpenHandle.Dispose()