diff --git a/standalone/mmf_simplified/inputs/pamc_idealized/pamc_input_extruded_supercell.yaml b/standalone/mmf_simplified/inputs/pamc_idealized/pamc_input_extruded_supercell.yaml
index d4b23d2d..d3033e6a 100644
--- a/standalone/mmf_simplified/inputs/pamc_idealized/pamc_input_extruded_supercell.yaml
+++ b/standalone/mmf_simplified/inputs/pamc_idealized/pamc_input_extruded_supercell.yaml
@@ -35,7 +35,7 @@ dycore_out_prefix : test_dycore
 out_freq : 600
 stat_freq : 10
 
-tstype : si
+tstype : ssprk3
 
 # Number of ensembles
 nens : 1