diff --git a/test/test_transaction.cpp b/test/test_transaction.cpp
index a4ef67ed438ca467132c8888b23898b7ec803374..b22477565b53de29d8c65f0ce0a2ef3fa1e68d28 100644
--- a/test/test_transaction.cpp
+++ b/test/test_transaction.cpp
@@ -531,4 +531,7 @@ TEST(test_transaction, test_query) {
             new_entity.GetId());
 }
 
+// TODO(fspreck) Add tests for unique queries, count queries, and mixed
+// transactions (FIND + RetrieveById, COUNT + RetrieveById).
+
 } // namespace caosdb::transaction