diff --git a/tag_database b/tag_database
index f80455966..17db9e5fb 100644
--- a/tag_database
+++ b/tag_database
@@ -24,3 +24,7 @@ count_by:list
 difference_by:list
 insertion_sort:list
 bubble_sort:list
+has_duplicates:list
+keys_only:object
+values_only:object
+all_unique:object
\ No newline at end of file