diff --git a/test/test-stress.c b/test/test-stress.c
index 271bea85..46e1eac4 100644
--- a/test/test-stress.c
+++ b/test/test-stress.c
@@ -26,7 +26,7 @@ terms of the MIT license.
 //
 // argument defaults
 static int THREADS = 32;      // more repeatable if THREADS <= #processors
-static int SCALE   = 10;      // scaling factor
+static int SCALE   = 25;      // scaling factor
 static int ITER    = 50;      // N full iterations destructing and re-creating all threads
 
 // static int THREADS = 8;    // more repeatable if THREADS <= #processors