diff --git a/bld/unit_testers/build-namelist_test.pl b/bld/unit_testers/build-namelist_test.pl
index 0c7a49d8b5..9b579dd9ce 100755
--- a/bld/unit_testers/build-namelist_test.pl
+++ b/bld/unit_testers/build-namelist_test.pl
@@ -1061,7 +1061,7 @@ sub cat_and_create_namelistinfile {
                                      GLC_TWO_WAY_COUPLING=>"FALSE",
                                      phys=>"clm4_5",
                                    },
-     "useinventorybutnotfile"    =>{ options=>"-bgc fates -envxml_dir . -no-megan",
+     "useinventorybutnotfile"    =>{ options=>"--res 0.9x1.25 --bgc fates --envxml_dir . --no-megan",
                                      namelst=>"use_fates_luh=.true.",
                                      GLC_TWO_WAY_COUPLING=>"FALSE",
                                      phys=>"clm4_5",