diff --git a/.github/workflows/wec-collector-observation.yml b/.github/workflows/wec-collector-observation.yml
index d43580c3..dc1b3aa4 100644
--- a/.github/workflows/wec-collector-observation.yml
+++ b/.github/workflows/wec-collector-observation.yml
@@ -33,8 +33,13 @@ jobs:
           ./tests/WecSubscriptionXml.Tests.ps1
           ./tests/WefDeployment.Tests.ps1
           ./tests/WefDeployment.Cli.Tests.ps1
-      - name: Existing read-only source and collector service preservation
-        shell: ${{ matrix.engine }}
+      - name: Existing read-only service preservation in Windows PowerShell 5.1
+        if: matrix.engine == 'powershell'
+        shell: powershell
+        run: ./tests/WefDeployment.Windows.Tests.ps1
+      - name: Existing read-only service preservation in PowerShell 7
+        if: matrix.engine == 'pwsh'
+        shell: pwsh
         run: ./tests/WefDeployment.Windows.Tests.ps1
       - name: Actual public collector observations in Windows PowerShell 5.1
         if: matrix.engine == 'powershell'