diff --git a/src/UIShell/GlobalHeader/HeaderNav.svelte b/src/UIShell/GlobalHeader/HeaderNav.svelte
index d7dd5e98..33b68399 100644
--- a/src/UIShell/GlobalHeader/HeaderNav.svelte
+++ b/src/UIShell/GlobalHeader/HeaderNav.svelte
@@ -13,7 +13,7 @@
 </script>
 
 <nav {...props} class:bx--header__nav="{true}" {...$$restProps}>
-  <ul {...props} class:bx--header__menu-bar="{true}">
+  <ul {...props} role="menubar" class:bx--header__menu-bar="{true}">
     <slot />
   </ul>
 </nav>
diff --git a/src/UIShell/GlobalHeader/HeaderNavItem.svelte b/src/UIShell/GlobalHeader/HeaderNavItem.svelte
index 60376fcf..37e57af0 100644
--- a/src/UIShell/GlobalHeader/HeaderNavItem.svelte
+++ b/src/UIShell/GlobalHeader/HeaderNavItem.svelte
@@ -26,7 +26,7 @@
   $: updateSelectedItems({ id, isSelected });
 </script>
 
-<li>
+<li role="none">
   <a
     bind:this="{ref}"
     role="menuitem"
diff --git a/src/UIShell/GlobalHeader/HeaderNavMenu.svelte b/src/UIShell/GlobalHeader/HeaderNavMenu.svelte
index 4833a40a..e170f2a3 100644
--- a/src/UIShell/GlobalHeader/HeaderNavMenu.svelte
+++ b/src/UIShell/GlobalHeader/HeaderNavMenu.svelte
@@ -48,6 +48,7 @@
 />
 
 <li
+  role="none"
   class:bx--header__submenu="{true}"
   class:bx--header__submenu--current="{isCurrentSubmenu}"
   on:click="{(e) => {
@@ -65,6 +66,7 @@
 >
   <a
     bind:this="{ref}"
+    role="menuitem"
     tabindex="0"
     aria-haspopup="menu"
     aria-expanded="{expanded}"