diff --git a/config/model_configs/diagnostic_edmfx_rico_box.yml b/config/model_configs/diagnostic_edmfx_rico_box.yml
index 36e072f867e..630ac3c9d8b 100644
--- a/config/model_configs/diagnostic_edmfx_rico_box.yml
+++ b/config/model_configs/diagnostic_edmfx_rico_box.yml
@@ -23,5 +23,5 @@ z_elem: 100
 z_max: 4e3
 z_stretch: false
 dt: 10secs
-t_end: 24hours
+t_end: 12hours
 dt_save_to_disk: 10mins