diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69674637..e0b3a490 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ For older change log history see the [historic changelog](HISTORIC_CHANGELOG.md)
 
 ## [Unreleased]
 
+### Fixed
+
+- Move test pipeline to Windows PowerShell. The hosted agent was updated
+  to PowerShell 7.4.1. That broke the ASKDSKey unit tests that has a helper
+  function (`Copy-ArrayObjects`) that serializes objects.
+
 ## [6.3.0] - 2023-08-24
 
 ### Removed
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 41c5d389..6b70c1d8 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -101,7 +101,7 @@ stages:
             inputs:
               filePath: './build.ps1'
               arguments: "-Tasks test -PesterScript 'tests/Unit'"
-              pwsh: true
+              pwsh: false
           - task: PublishTestResults@2
             displayName: 'Publish Test Results'
             condition: succeededOrFailed()