diff --git a/tests/default_vars.sh b/tests/default_vars.sh
index 9265e61afb..5942affc34 100644
--- a/tests/default_vars.sh
+++ b/tests/default_vars.sh
@@ -440,6 +440,7 @@ export FV3_RUN=control_run.IN
 export INPUT_NML=control.nml.IN
 export CCPP_SUITE=FV3_GFS_v16
 
+export POST_ITAG=post_itag_gfs
 export POSTXCONFIG=postxconfig-NT-gfs.txt
 export POSTXCONFIG_FH00=postxconfig-NT-gfs_FH00.txt
 
diff --git a/tests/fv3_conf/control_run.IN b/tests/fv3_conf/control_run.IN
index e273b4f545..e047315096 100644
--- a/tests/fv3_conf/control_run.IN
+++ b/tests/fv3_conf/control_run.IN
@@ -122,7 +122,7 @@ fi
 
 #inline post
 if [[ $POSTAPP = 'global' ]]; then
-  cp    ${PATHRT}/parm/post_itag_gfs itag
+  cp    ${PATHRT}/parm/@[POST_ITAG] itag
   cp    ${PATHRT}/parm/@[POSTXCONFIG] postxconfig-NT.txt
   cp    ${PATHRT}/parm/@[POSTXCONFIG_FH00] postxconfig-NT_FH00.txt
   cp    ${PATHRT}/parm/params_grib2_tbl_new params_grib2_tbl_new
diff --git a/tests/parm/post_itag_hafs_ar b/tests/parm/post_itag_hafs_ar
new file mode 100644
index 0000000000..6504929887
--- /dev/null
+++ b/tests/parm/post_itag_hafs_ar
@@ -0,0 +1,6 @@
+&MODEL_INPUTS
+ MODELNAME='FV3R'
+/
+&NAMPGB
+ KPO=57,PO=1000.,975.,950.,925.,900.,875.,850.,825.,800.,775.,750.,725.,700.,675.,650.,625.,600.,575.,550.,525.,500.,475.,450.,425.,400.,375.,350.,325.,300.,275.,250.,225.,200.,175.,150.,125.,100.,70.,50.,40.,30.,20.,15.,10.,7.,5.,3.,2.,1.,0.7,0.4,0.2,0.1,0.07,0.04,0.02,0.01,
+/
diff --git a/tests/tests/gnv1_nested b/tests/tests/gnv1_nested
index 7f832eee85..96416bc79b 100644
--- a/tests/tests/gnv1_nested
+++ b/tests/tests/gnv1_nested
@@ -313,6 +313,7 @@ export LANDICE=.false.
 # Select input files and resources for the regression test system.
 
 # UPP output field lists.
+export POST_ITAG=post_itag_hafs_ar
 export POSTXCONFIG=postxconfig-NT-hafs_ar_nosat.txt
 export POSTXCONFIG_FH00=$POSTXCONFIG