diff --git a/.testing/tc4/MOM_input b/.testing/tc4/MOM_input
index 456783af88..deb496315a 100644
--- a/.testing/tc4/MOM_input
+++ b/.testing/tc4/MOM_input
@@ -7,10 +7,15 @@
 USE_REGRIDDING = True           !   [Boolean] default = False
                                 ! If True, use the ALE algorithm (regridding/remapping). If False, use the
                                 ! layered isopycnal algorithm.
-DT = 300.0                      !   [s]
+DT = 1200.0                      !   [s]
                                 ! The (baroclinic) dynamics time step.  The time-step that is actually used will
                                 ! be an integer fraction of the forcing time-step (DT_FORCING in ocean-only mode
                                 ! or the coupling timestep in coupled mode.)
+DT_THERM = 3600.0                !   [s] default = 300.0
+                                ! The thermodynamic and tracer advection time step. Ideally DT_THERM should be
+                                ! an integer multiple of DT and less than the forcing or coupling time-step,
+                                ! unless THERMO_SPANS_COUPLING is true, in which case DT_THERM can be an integer
+                                ! multiple of the coupling timestep.  By default DT_THERM is set to DT.				
 C_P = 3925.0                    !   [J kg-1 K-1] default = 3991.86795711963
                                 ! The heat capacity of sea water, approximated as a constant. This is only used
                                 ! if ENABLE_THERMODYNAMICS is true. The default value is from the TEOS-10
@@ -377,7 +382,7 @@ WIND_CONFIG = "zero"            !
 ! === module MOM_restart ===
 
 ! === module MOM_main (MOM_driver) ===
-DAYMAX = 1.0                    !   [days]
+DAYMAX = 0.25                    !   [days]
                                 ! The final time of the whole simulation, in units of TIMEUNIT seconds.  This
                                 ! also sets the potential end time of the present run segment if the end time is
                                 ! not set via ocean_solo_nml in input.nml.
diff --git a/.testing/tc4/build_data.py b/.testing/tc4/build_data.py
index 50f45ce9f1..e060d05cb1 100644
--- a/.testing/tc4/build_data.py
+++ b/.testing/tc4/build_data.py
@@ -30,7 +30,7 @@ def t_fc(x, y, z, radius=5.0, tmag=1.0):
 
 
 ny, nx = x.shape
-nz = 10
+nz = 3
 z = (np.arange(nz) * zbot0) / nz
 
 temp = t_fc(x, y, z)