diff --git a/csharp/ql/test/query-tests/Security Features/CWE-611/stubs.cs b/csharp/ql/test/query-tests/Security Features/CWE-611/stubs.cs
index 04c39623cacd..6375ac035c12 100644
--- a/csharp/ql/test/query-tests/Security Features/CWE-611/stubs.cs	
+++ b/csharp/ql/test/query-tests/Security Features/CWE-611/stubs.cs	
@@ -1,3 +1,9 @@
-namespace System.Web;
+namespace System
+{
+    public class Uri { }
 
-public interface IHtmlString { }
+    namespace Web
+    {
+        public interface IHtmlString { }
+    }
+}
diff --git a/csharp/ql/test/resources/stubs/System.Web.cs b/csharp/ql/test/resources/stubs/System.Web.cs
index f0572742f883..c15b871095ff 100644
--- a/csharp/ql/test/resources/stubs/System.Web.cs
+++ b/csharp/ql/test/resources/stubs/System.Web.cs
@@ -178,6 +178,13 @@ public class HttpRequest
         public string RawUrl { get; set; }
         public HttpCookieCollection Cookies => null;
         public bool IsAuthenticated { get; set; }
+        public NameValueCollection Form { get; }
+        public NameValueCollection Headers { get; }
+        public NameValueCollection Params { get; }
+        public string UserAgent { get; }
+        public Uri UrlReferrer { get; }
+        public NameValueCollection ServerVariables { get; }
+        public String this[String key] => null;
     }
 
     public class HttpRequestWrapper : System.Web.HttpRequestBase