diff --git a/mozilla/layout/reftests/text/reftest.list b/mozilla/layout/reftests/text/reftest.list
index 364a6a22bf6..bd911175a82 100644
--- a/mozilla/layout/reftests/text/reftest.list
+++ b/mozilla/layout/reftests/text/reftest.list
@@ -1,7 +1,7 @@
 == long-1.html long-ref.html
-== soft-hyphens-1a.html soft-hyphens-1-ref.html
-== soft-hyphens-1b.html soft-hyphens-1-ref.html
-== soft-hyphens-1c.html soft-hyphens-1-ref.html
+random == soft-hyphens-1a.html soft-hyphens-1-ref.html # bug 406299
+random == soft-hyphens-1b.html soft-hyphens-1-ref.html # bug 406299
+random == soft-hyphens-1c.html soft-hyphens-1-ref.html # bug 406299
 == white-space-1a.html white-space-1-ref.html
 == white-space-1b.html white-space-1-ref.html
 == white-space-2.html white-space-2-ref.html