diff --git a/.github/actions/bootstrap/action.yml b/.github/actions/bootstrap/action.yml
index a468540be..5b9171639 100644
--- a/.github/actions/bootstrap/action.yml
+++ b/.github/actions/bootstrap/action.yml
@@ -20,6 +20,7 @@ runs:
         git tag --list
     - uses: actions/setup-dotnet@v4
       with:
+        dotnet-version: 9.0.100
         global-json-file: global.json
         
     - id: dotnet
@@ -37,4 +38,3 @@ runs:
         cache: npm
         cache-dependency-path: src/Elastic.Markdown/package-lock.json
         node-version-file: .nvmrc
-      
\ No newline at end of file
diff --git a/global.json b/global.json
index 00b67caef..41c9ad2ed 100644
--- a/global.json
+++ b/global.json
@@ -4,4 +4,4 @@
     "rollForward": "latestFeature",
     "allowPrerelease": false
   }
-}
\ No newline at end of file
+}
diff --git a/tests/authoring/Framework/HtmlAssertions.fs b/tests/authoring/Framework/HtmlAssertions.fs
index cad73f592..087f6698c 100644
--- a/tests/authoring/Framework/HtmlAssertions.fs
+++ b/tests/authoring/Framework/HtmlAssertions.fs
@@ -86,11 +86,19 @@ actual: {actual}
     let private prettyHtml (html:string) (querySelector: string option) =
         let parser = HtmlParser()
         let document = parser.ParseDocument(html)
+        
+        let elementOpt: IElement option =
+            match querySelector with
+            | Some q -> Option.ofObj (document.QuerySelector q)
+            // IHtmlBodyElement implements IElement. document.Body returns IHtmlBodyElement?
+            // Option.ofObj will handle if document.Body is null (though unlikely for valid HTML documents)
+            | None -> Option.ofObj (document.Body :> IElement)
+
+        
         let element =
             match querySelector with
             | Some q -> document.QuerySelector q
             | None -> document.Body
-
         let links = element.QuerySelectorAll("a")
         links
         |> Seq.iter(fun l ->