--- a/accessible/generic/Accessible.cpp
+++ b/accessible/generic/Accessible.cpp
@@ -1489,17 +1489,17 @@ Accessible::ARIATransformRole(role aRole
   // case, it should not be especially bad here: If the author hasn't used the
   // region role, this calculation won't occur. And the region role's name
   // calculation rule excludes name from content. That said, this use case is
   // another example of why we should consider caching the accessible name. See:
   // https://bugzilla.mozilla.org/show_bug.cgi?id=1378235.
   if (aRole == roles::REGION) {
     nsAutoString name;
     Name(name);
-    return name.IsEmpty() ? NativeRole() : aRole;
+    return name.IsEmpty() ? NativeRole() : roles::LANDMARK;
   }
 
   // XXX: these unfortunate exceptions don't fit into the ARIA table. This is
   // where the accessible role depends on both the role and ARIA state.
   if (aRole == roles::PUSHBUTTON) {
     if (nsAccUtils::HasDefinedARIAToken(mContent, nsGkAtoms::aria_pressed)) {
       // For simplicity, any existing pressed attribute except "" or "undefined"
       // indicates a toggle.

--- a/accessible/tests/mochitest/role/test_aria.html
+++ b/accessible/tests/mochitest/role/test_aria.html
@@ -52,19 +52,19 @@
       testRole("aria_menuitemradio", ROLE_RADIO_MENU_ITEM);
       testRole("aria_note", ROLE_NOTE);
       testRole("aria_paragraph", ROLE_PARAGRAPH);
       testRole("aria_presentation", ROLE_TEXT); // weak role
       testRole("aria_progressbar", ROLE_PROGRESSBAR);
       testRole("aria_radio", ROLE_RADIOBUTTON);
       testRole("aria_radiogroup", ROLE_RADIO_GROUP);
       testRole("aria_region_no_name", ROLE_TEXT);
-      testRole("aria_region_has_label", ROLE_REGION);
-      testRole("aria_region_has_labelledby", ROLE_REGION);
-      testRole("aria_region_has_title", ROLE_REGION);
+      testRole("aria_region_has_label", ROLE_LANDMARK);
+      testRole("aria_region_has_labelledby", ROLE_LANDMARK);
+      testRole("aria_region_has_title", ROLE_LANDMARK);
       testRole("aria_region_empty_name", ROLE_TEXT);
       testRole("aria_row", ROLE_ROW);
       testRole("aria_rowheader", ROLE_ROWHEADER);
       testRole("aria_scrollbar", ROLE_SCROLLBAR);
       testRole("aria_searchbox", ROLE_ENTRY);
       testRole("aria_separator", ROLE_SEPARATOR);
       testRole("aria_slider", ROLE_SLIDER);
       testRole("aria_spinbutton", ROLE_SPINBUTTON);