diff --git a/tests/datm_conf/test_case_cfsr.IN b/tests/datm_conf/test_case_cfsr.IN
new file mode 100644
index 0000000..3dea8d2
--- /dev/null
+++ b/tests/datm_conf/test_case_cfsr.IN
@@ -0,0 +1,25 @@
+mkdir INPUT DATM_INPUT RESTART history MOM6_OUTPUT
+
+# FV3 fixed input
+cp    @[RTPWD]/DATM/cfsr.SCRIP.nc DATM_INPUT
+export IATM=1760
+export JATM=880
+
+# MOM6 fixed input
+cp    @[RTPWD]/MOM6_FIX_025deg/* ./INPUT
+
+# CICE5 fixed input
+cp    @[RTPWD]/CICE_FIX_mx025/grid_cice_NEMS_mx025.nc .
+cp    @[RTPWD]/CICE_FIX_mx025/kmtu_cice_NEMS_mx025.nc .
+
+# ICs
+ln -s @[RTPWD]/DATM/CFSR/201110/cfsr*nc DATM_INPUT/
+ln -s @[RTPWD]/DATM/CFSR/201111/cfsr*nc DATM_INPUT/
+ln -s @[RTPWD]/DATM/CFSR/201112/cfsr*nc DATM_INPUT/
+cp    @[RTPWD]/MOM6_IC/2011100100/MOM*.nc ./INPUT
+cp    @[RTPWD]/CICE_IC/cice5_model_0.25.cpc*.nc cice5_model.res.nc
+
+# WARM START
+if [[ ! $MED_restart_data == '' ]]; then
+  cp  @[RTPWD]/MEDIATOR_CFSR/mediator_* .
+fi
diff --git a/tests/datm_conf/test_case_gefs.IN b/tests/datm_conf/test_case_gefs.IN
new file mode 100644
index 0000000..ccb94b7
--- /dev/null
+++ b/tests/datm_conf/test_case_gefs.IN
@@ -0,0 +1,25 @@
+mkdir INPUT DATM_INPUT RESTART history MOM6_OUTPUT
+
+# FV3 fixed input
+cp    @[RTPWD]/DATM/gefs.SCRIP.nc DATM_INPUT
+export IATM=1536
+export JATM=768
+
+# MOM6 fixed input
+cp    @[RTPWD]/MOM6_FIX_025deg/* ./INPUT
+
+# CICE5 fixed input
+cp    @[RTPWD]/CICE_FIX_mx025/grid_cice_NEMS_mx025.nc .
+cp    @[RTPWD]/CICE_FIX_mx025/kmtu_cice_NEMS_mx025.nc .
+
+# ICs
+ln -s @[RTPWD]/DATM/GEFS/201110/gefs*nc DATM_INPUT/
+ln -s @[RTPWD]/DATM/GEFS/201111/gefs*nc DATM_INPUT/
+ln -s @[RTPWD]/DATM/GEFS/201112/gefs*nc DATM_INPUT/
+cp    @[RTPWD]/MOM6_IC/2011100100/MOM*.nc ./INPUT
+cp    @[RTPWD]/CICE_IC/cice5_model_0.25.cpc*.nc cice5_model.res.nc
+
+# WARM START
+if [[ ! $MED_restart_data == '' ]]; then
+  cp  @[RTPWD]/MEDIATOR_GEFS/mediator_* .
+fi
diff --git a/tests/default_vars.sh b/tests/default_vars.sh
index 3d46907..0ab93e4 100755
--- a/tests/default_vars.sh
+++ b/tests/default_vars.sh
@@ -108,7 +108,7 @@ export SYEAR='2011'
 export SMONTH='10'
 export SDAY='01'
 export SHOUR='00'
-export CDATE=$[SYEAR]$[SMONTH]$[SDAY]$[SHOUR]
+export CDATE=${SYEAR}${SMONTH}${SDAY}${SHOUR}
 export NFHOUT=6
 export DAYS=0.041666666
 export FHMAX=1
diff --git a/tests/rt_20d.conf b/tests/rt_20d.conf
new file mode 100644
index 0000000..a4c2091
--- /dev/null
+++ b/tests/rt_20d.conf
@@ -0,0 +1,4 @@
+COMPILE | coupled_DATM_MOM6_CICE             |   | hera.intel  | datm |
+COMPILE | coupled_DATM_MOM6_CICE             |   | orion.intel | datm |
+RUN     | cpld_datm_mom6_cice5_20d_cfsr      |   |             | datm |
+RUN     | cpld_datm_mom6_cice5_20d_gefs      |   |             | datm |
diff --git a/tests/tests/cpld_datm_mom6_cice5_20d_cfsr b/tests/tests/cpld_datm_mom6_cice5_20d_cfsr
new file mode 100644
index 0000000..6dece92
--- /dev/null
+++ b/tests/tests/cpld_datm_mom6_cice5_20d_cfsr
@@ -0,0 +1,42 @@
+#
+#  CPLD_DATM_MOM6_CICE_2D_ATM_FLUX test
+#
+
+export TEST_DESCR="DATM-MOM6-CICE system - 20-day run"
+
+export CNTL_DIR="test_case_20d_CFSR"
+export CNTLMED_DIR="test_case_20d_CFSR/RESTART"
+
+export LIST_FILES=""
+export_datm
+export_cpl
+
+export FILENAME_BASE='cfsr.'
+export DATM_SRC='CFSR'
+export IATM='1760'
+export JATM='880'
+export RESTART_INTERVAL=432000
+
+export DAYS="20"
+export FHMAX="480"
+export FDIAG="6"
+export WLCLK=240
+
+# set component and coupling timesteps
+export DT_CICE=${DT_ATMOS}
+export CPL_SLOW=${DT_THERM_MOM6}
+export CPL_FAST=${DT_ATMOS}
+
+# write a CICE restart at DAYS
+export DUMPFREQ_N=${DAYS}
+export DUMPFREQ="d"
+
+# nems.configure
+export NEMS_CONFIGURE="nems.configure.med_atm_ocn_ice.IN"
+export coupling_interval_slow_sec=${CPL_SLOW}
+export coupling_interval_fast_sec=${CPL_FAST}
+
+export FV3_RUN=test_case_cfsr.IN
+
+export MED_restart_data='MEDIATOR_CFSR'
+export regression_test='NO'
diff --git a/tests/tests/cpld_datm_mom6_cice5_20d_gefs b/tests/tests/cpld_datm_mom6_cice5_20d_gefs
new file mode 100644
index 0000000..d53d109
--- /dev/null
+++ b/tests/tests/cpld_datm_mom6_cice5_20d_gefs
@@ -0,0 +1,40 @@
+#
+#  CPLD_DATM_MOM6_CICE_2D_ATM_FLUX test
+#
+
+export TEST_DESCR="DATM-MOM6-CICE system - 20-day run"
+
+export CNTL_DIR="test_case_20d_GEFS"
+export CNTLMED_DIR="test_case_20d_GEFS/RESTART"
+
+export LIST_FILES=""
+export_datm
+export_cpl
+
+export FILENAME_BASE='gefs.'
+export DATM_SRC='GEFS'
+export RESTART_INTERVAL=432000
+
+export DAYS="20"
+export FHMAX="480"
+export FDIAG="6"
+export WLCLK=240
+
+# set component and coupling timesteps
+export DT_CICE=${DT_ATMOS}
+export CPL_SLOW=${DT_THERM_MOM6}
+export CPL_FAST=${DT_ATMOS}
+
+# write a CICE restart at DAYS
+export DUMPFREQ_N=${DAYS}
+export DUMPFREQ="d"
+
+# nems.configure
+export NEMS_CONFIGURE="nems.configure.med_atm_ocn_ice.IN"
+export coupling_interval_slow_sec=${CPL_SLOW}
+export coupling_interval_fast_sec=${CPL_FAST}
+
+export FV3_RUN=test_case_gefs.IN
+
+export MED_restart_data='MEDIATOR_GEFS'
+export regression_test='NO'