diff --git a/src/keys.ml b/src/keys.ml
index dea4f455..69721fec 100644
--- a/src/keys.ml
+++ b/src/keys.ml
@@ -54,7 +54,8 @@ module Make (Conn : Pg.CONN) : S = struct
   let find_denomination h_pub = Pg.find_denom conn h_pub |> unwrap_err_caqti
 
   (* TODO
-     check if database is coherent with secmod *)
+     check if database is coherent with secmod
+     => have something to run independent tests with clean db+sm *)
   let signkeys () : Signkey.t list result =
     let now = Timestamp.of_ptime @@ Ptime_clock.now () in
     Pg.get_active_signkeys conn ~now |> unwrap_err_caqti