diff --git a/.vsts-ci/install-ps.yml b/.vsts-ci/install-ps.yml
index 97502e4f69..b752c5c8c9 100644
--- a/.vsts-ci/install-ps.yml
+++ b/.vsts-ci/install-ps.yml
@@ -14,6 +14,7 @@ trigger:
     - /tools/installpsh-osx.sh
     - /tools/installpsh-redhat.sh
     - /tools/installpsh-suse.sh
+    - /tools/install-powershell.ps1
 pr:
   branches:
     include:
@@ -27,6 +28,7 @@ pr:
     - /tools/installpsh-osx.sh
     - /tools/installpsh-redhat.sh
     - /tools/installpsh-suse.sh
+    - /tools/install-powershell.ps1
 
 variables:
   DOTNET_CLI_TELEMETRY_OPTOUT: 1
@@ -47,3 +49,9 @@ phases:
     scriptName: ./tools/install-powershell.sh
     jobName: InstallPowerShellMacOS
     pool: Hosted macOS
+
+- template: templates/install-ps-phase.yml
+  parameters:
+    scriptName: pwsh -c ./tools/install-powershell.ps1 -AddToPath
+    jobName: InstallPowerShellPS1Ubuntu
+    pool: Hosted Ubuntu 1604
diff --git a/tools/install-powershell.ps1 b/tools/install-powershell.ps1
index 46cfacc106..06c9249bf0 100644
--- a/tools/install-powershell.ps1
+++ b/tools/install-powershell.ps1
@@ -386,7 +386,7 @@ try {
                 if ($uid -ne "0") { $SUDO = "sudo" } else { $SUDO = "" }
 
                 Write-Verbose "Make symbolic link '$symlink' point to '$targetPath'..." -Verbose
-                Invoke-Expression -Command "$SUDO ln -fs $targetPath $symlink"
+                & $SUDO ln -fs $targetPath $symlink
 
                 if ($LASTEXITCODE -ne 0) {
                     Write-Error "Could not add to PATH: failed to make '$symlink' point to '$targetPath'."