diff --git a/tests/optimizers/fs2000_99.mod b/tests/optimizers/fs2000_99.mod
index cc28dbc632c579cbccf1f863753ccb910e2780a7..7f09159d38e1bb2cf5bac165033fd9f731320277 100644
--- a/tests/optimizers/fs2000_99.mod
+++ b/tests/optimizers/fs2000_99.mod
@@ -22,10 +22,14 @@
  * This implementation was originally written by Michel Juillard. Please note that the
  * following copyright notice only applies to this Dynare implementation of the
  * model.
+ *
+ * Uses mode_compute=99 for the One-Step method which delivers a fast and asymptotically 
+ * efficient estimator from the correction of a preliminary convergent estimator  
+ * obtained on a learning sample of size T power delta.
  */
 
 /*
- * Copyright © 2004-2023 Dynare Team
+ * Copyright © 2004-2025 Dynare Team
  *
  * This file is part of Dynare.
  *