diff --git a/tests/kalman_filter_fast/swk_simul.mod b/tests/kalman_filter_fast/swk_simul.mod
index 56ad3214c..9bdb81f0d 100644
--- a/tests/kalman_filter_fast/swk_simul.mod
+++ b/tests/kalman_filter_fast/swk_simul.mod
@@ -95,8 +95,9 @@ end;
 
 stoch_simul(order=1,periods=200,irf=0,noprint);
 
+save pseudo_data.mat ...
 @#for c in countries
-save pseudo_data.mat Y_@{c} C_@{c} I_@{c} E_@{c} PIE_@{c} W_@{c} R_@{c} -append;
+Y_@{c} C_@{c} I_@{c} E_@{c} PIE_@{c} W_@{c} R_@{c} ...
 @#endfor