diff --git a/src/TODO b/src/TODO
index 5797df788..d2b067d55 100644
--- a/src/TODO
+++ b/src/TODO
@@ -1,4 +1,3 @@
-- Test OpenType 1.6 mark filtering sets
 - HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH vs LookupType::... mess
 - Rename LookupFlag::MarkAttachmentType to LookupFlag:IgnoreSpecialMarks
 - cmap14 support in get_glyph callback