diff --git a/tests/test-org-ql.el b/tests/test-org-ql.el
index 25e8a2b..1315ccb 100644
--- a/tests/test-org-ql.el
+++ b/tests/test-org-ql.el
@@ -435,6 +435,7 @@ RESULTS should be a list of strings as returned by
   (describe "Query results"
 
     ;; TODO: Other predicates.
+    ;; TODO: (level) predicate.
 
     (describe "(ancestors)"
       (org-ql-it "without sub-query"