--- a/layout/style/test/stylo-failures.md
+++ b/layout/style/test/stylo-failures.md
@@ -402,17 +402,17 @@ to mochitest command.
   * test_bug98997.html: pseudo-class :empty and :-moz-only-whitespace bug 1337068 [75]
   * :-moz-locale-dir
     * test_selectors.html `:-moz-locale-dir` [15]
   * :-moz-lwtheme-*
     * test_selectors.html `:-moz-lwtheme` [3]
   * :-moz-window-inactive bug 1348489
     * test_selectors.html `:-moz-window-inactive` [2]
   * :-moz-{first,last}-node
-    * test_selectors.html `:-moz-` [13]
+    * test_selectors.html `:-moz-` [6]
     * ... `unexpected rule index` [5]
   * :dir
     * test_selectors.html `:dir` [10]
 * issues arround font shorthand servo/servo#15032 servo/servo#15036
   * test_bug377947.html [1]
   * test_value_storage.html `'font'` [144]
   * test_shorthand_property_getters.html `font shorthand` [1]
   * test_system_font_serialization.html [10]