diff --git a/CHANGES.md b/CHANGES.md
index b957754b4c72a1149d673dde68957bd55de2caf5..7c5cffda9267aa2219c00abbdf2c5c104b8db1b9 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -25,6 +25,9 @@
   which under infrequent circumstances could appear,
   has been eliminated.
 
+* Improve Monolith's own `make test` so that it runs reliably in about 20
+  seconds (wall clock time) on a modern machine.
+
 ## 2024/11/26
 
 * The documentation of the specification combinators has been re-organized