diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 8e83602..b433e19 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -54,7 +54,7 @@ jobs:
              3.0.x
       - name: Verify dotnet
         shell: pwsh
-        run: __tests__/verify-dotnet.ps1 2.2.402 3.1.404
+        run: __tests__/verify-dotnet.ps1 2.2.402 3.1.404 3.0
 
   test-setup-full-version:
     runs-on: ${{ matrix.operating-system }}
diff --git a/__tests__/verify-dotnet.ps1 b/__tests__/verify-dotnet.ps1
index 7068c87..3a377c7 100755
--- a/__tests__/verify-dotnet.ps1
+++ b/__tests__/verify-dotnet.ps1
@@ -20,7 +20,7 @@ if($args.count -eq 1)
 if ($args[1])
 {
   # SDKs are listed on multiple lines with the path afterwards in square brackets
-  $versions = & $dotnet --list-sdks | ForEach-Object { $_.SubString(0, $_.IndexOf('[')).Trim() }
+  $versions = & $dotnet --list-sdks select -Unique | ForEach-Object { $_.SubString(0, $_.IndexOf('[')).Trim() }
   Write-Host "Installed versions: $versions"
   $InstalledVersionCount = 0
   foreach($arg in $args){