diff --git a/dom/base/test/mochitest.ini b/dom/base/test/mochitest.ini
index ed108ab1b139..67db376823f0 100644
--- a/dom/base/test/mochitest.ini
+++ b/dom/base/test/mochitest.ini
@@ -787,7 +787,7 @@ skip-if = debug == true && toolkit == 'android' # Timing dependent, skip slow de
 support-files = file_title.xul
 [test_treewalker_nextsibling.xml]
 [test_user_select.html]
-skip-if = toolkit == 'android'
+skip-if = (toolkit == 'android') || (os == 'win' && !debug) # Windows is timing dependent(bug 1383512)
 [test_viewport_scroll.html]
 [test_viewsource_forbidden_in_object.html]
 [test_w3element_traversal.html]