diff --git a/cime_config/testdefs/testlist_cam.xml b/cime_config/testdefs/testlist_cam.xml
index 1d09928e86..146fbc15eb 100644
--- a/cime_config/testdefs/testlist_cam.xml
+++ b/cime_config/testdefs/testlist_cam.xml
@@ -334,14 +334,14 @@
     </options>
   </test>
 
-  <test compset="FCARMA2000climo" grid="f19_f19_mg17" name="SMS_D_Ln9" testmods="cam/outfrq9s" supported="false">
+  <test compset="FCARMA2000climo" grid="f19_f19_mg17" name="SMS_D_Ln9" testmods="cam/outfrq9s_carma_rad_diag" supported="false">
     <machines>
       <machine name="derecho" compiler="intel" category="aux_cam"/>
       <machine name="derecho" compiler="intel" category="carma"/>
     </machines>
     <options>
       <option name="wallclock">00:40:00</option>
-      <option name="comment">CARMA trop_strat model test</option>
+      <option name="comment">CARMA trop_strat, rad_diag w/ sectional CARMA bins</option>
     </options>
   </test>
   <test compset="FWmaCARMAHIST" grid="f19_f19_mg17" name="SMS_D_Ln9" testmods="cam/outfrq9s" supported="false">
diff --git a/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/shell_commands b/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/shell_commands
new file mode 100644
index 0000000000..eb40ad83e0
--- /dev/null
+++ b/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/shell_commands
@@ -0,0 +1,2 @@
+./xmlchange ROF_NCPL=\$ATM_NCPL
+./xmlchange GLC_NCPL=\$ATM_NCPL
diff --git a/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/user_nl_cam b/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/user_nl_cam
new file mode 100644
index 0000000000..b1df4587d1
--- /dev/null
+++ b/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/user_nl_cam
@@ -0,0 +1,31 @@
+mfilt=1,1,1,1,1,1
+ndens=1,1,1,1,1,1
+nhtfrq=9,9,9,9,9,9
+write_nstep0=.true.
+inithist='ENDOFRUN'
+
+rad_diag_1 = 'A:Q:H2O', 'N:O2:O2', 'A:CO2:CO2', 'A:O3:O3', 'A:N2O:N2O', 'A:CH4:CH4',
+ 'N:CFC11:CFC11', 'N:CFC12:CFC12'
+
+rad_diag_2 = 'A:Q:H2O', 'N:O2:O2', 'A:CO2:CO2', 'A:O3:O3', 'A:N2O:N2O', 'A:CH4:CH4',
+ 'N:CFC11:CFC11', 'N:CFC12:CFC12',
+ 'B:MXAER01:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX01_rrtmg.nc',
+ 'B:MXAER02:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX02_rrtmg.nc',
+ 'B:MXAER03:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX03_rrtmg.nc',
+ 'B:MXAER04:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX04_rrtmg.nc',
+ 'B:MXAER05:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX05_rrtmg.nc',
+ 'B:MXAER06:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX06_rrtmg.nc',
+ 'B:MXAER07:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX07_rrtmg.nc',
+ 'B:MXAER08:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX08_rrtmg.nc',
+ 'B:MXAER09:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX09_rrtmg.nc',
+ 'B:MXAER10:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX10_rrtmg.nc',
+ 'B:MXAER11:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX11_rrtmg.nc',
+ 'B:MXAER12:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX12_rrtmg.nc',
+ 'B:MXAER13:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX13_rrtmg.nc',
+ 'B:MXAER14:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX14_rrtmg.nc',
+ 'B:MXAER15:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX15_rrtmg.nc',
+ 'B:MXAER16:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX16_rrtmg.nc',
+ 'B:MXAER17:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX17_rrtmg.nc',
+ 'B:MXAER18:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX18_rrtmg.nc',
+ 'B:MXAER19:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX19_rrtmg.nc',
+ 'B:MXAER20:$DIN_LOC_ROOT/atm/cam/chem/carma/rrtmg/aerosol_cld_CRMIX20_rrtmg.nc'
diff --git a/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/user_nl_clm b/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/user_nl_clm
new file mode 100644
index 0000000000..c4cb9d28d6
--- /dev/null
+++ b/cime_config/testdefs/testmods_dirs/cam/outfrq9s_carma_rad_diag/user_nl_clm
@@ -0,0 +1,3 @@
+hist_nhtfrq = 9
+hist_mfilt  = 1
+hist_ndens  = 1