diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 09b9989..33afbb0 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -16,6 +16,7 @@ g2tmpl_test(test_g2tmpl_pdt4_1)
 g2tmpl_test(test_g2tmpl_pdt4_8)
 g2tmpl_test(test_g2tmpl_pdt4_11)
 g2tmpl_test(test_g2tmpl_pdt4_12)
+g2tmpl_test(test_g2tmpl_pdt4_46)
 g2tmpl_test(test_all_key_tables)
 g2tmpl_test(test_all_table_other)
 
diff --git a/tests/test_g2tmpl_pdt4_46.F90 b/tests/test_g2tmpl_pdt4_46.F90
new file mode 100644
index 0000000..2ca7f7f
--- /dev/null
+++ b/tests/test_g2tmpl_pdt4_46.F90
@@ -0,0 +1,86 @@
+! This is a test program for the NCEPLIBS-g2tmpl project. It tests the
+! g2sec4_temp46() subroutine.
+!
+! Ed Hartnett 4/16/24
+Program test_g2tmpl_pdt4_46
+  use grib2_all_tables_module
+  implicit none
+  
+  integer(4) :: icatg, iparm, hrs_obs_cutoff, min_obs_cutoff,         &
+       scale_fac1_size, scale_fac2_size,       &
+       fcst_time, scale_fac1, scaled_val1,                             &
+       scale_fac2, scaled_val2
+  integer(4) :: year_intvl, mon_intvl, day_intvl, hour_intvl, min_intvl, &
+       sec_intvl, num_time_range, stat_miss_val, &
+       leng_time_range_stat, time_inc_betwn_succ_fld
+  real :: scale_val1_size, scale_val2_size
+  character(len=80) :: aer_type, typ_intvl_size,                     &
+       typ_gen_proc_key,                        &
+       gen_proc_or_mod_key, unit_of_time_key, lvl_type1, lvl_type2,   &
+       type_of_stat_proc, type_of_time_inc, &
+       stat_unit_time_key, stat_unit_time_key_succ
+  integer(4) :: ipdstmpl46(35), ipdstmpllen, j
+  integer(4) :: ipdstmpl46_old(35)=(/ 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &
+       0, 0, 0, 255, 0, 0, 255, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /)
+  integer :: ipdsnum = 46
+
+  ipdstmpllen = 35
+  icatg = 0
+  iparm = 4
+  aer_type = 'ozone'
+  typ_intvl_size = 'smaller_than_first_limit'
+  scale_fac1_size = 0
+  scale_val1_size = 0
+  scale_fac2_size = 0
+  scale_val2_size = 0
+  typ_gen_proc_key = 'anal'
+  gen_proc_or_mod_key = 'res'
+  hrs_obs_cutoff = 0
+  min_obs_cutoff = 0
+  unit_of_time_key = 'minute'
+  fcst_time = 0
+  lvl_type1 = 'xxx'
+  scale_fac1 = 0
+  scaled_val1 = 0
+  lvl_type2 = 'xxx'
+  scale_fac2 = 0
+  scaled_val2 = 0
+  year_intvl = 0
+  mon_intvl = 0
+  day_intvl = 0
+  hour_intvl = 0
+  min_intvl = 0
+  sec_intvl = 0
+  num_time_range = 0
+  stat_miss_val = 0
+  type_of_stat_proc = 'AVE'
+  type_of_time_inc = 'reserved'
+  stat_unit_time_key = 'minute'
+  leng_time_range_stat = 0
+  stat_unit_time_key_succ = 'minute'
+  time_inc_betwn_succ_fld = 0
+
+  call g2sec4_temp46(icatg, iparm, aer_type, typ_intvl_size,                 &
+       scale_fac1_size, scale_val1_size, scale_fac2_size,      &
+       scale_val2_size, typ_gen_proc_key, gen_proc_or_mod_key, &
+       hrs_obs_cutoff, min_obs_cutoff,                         &
+       unit_of_time_key, fcst_time, lvl_type1, scale_fac1,     &
+       scaled_val1, lvl_type2, scale_fac2, scaled_val2,        &
+       year_intvl,                                             &
+       mon_intvl, day_intvl, hour_intvl, min_intvl, sec_intvl, &
+       num_time_range, stat_miss_val, type_of_stat_proc,       &
+       type_of_time_inc, stat_unit_time_key,                   &
+       leng_time_range_stat, stat_unit_time_key_succ,          &
+       time_inc_betwn_succ_fld, ipdstmpl46)
+  ! write(6,'(A,1x,i0,a,80(1x,I0))')'Original PRODUCT TEMPLATE 4.', &
+  !      ipdsnum,' : ',(ipdstmpl12_old(j),j = 1,ipdstmpllen)
+   write(6,'(A,1x,i0,a,80(1x,I0))')'  NEW    PRODUCT TEMPLATE 4.', &
+        ipdsnum,' : ',(ipdstmpl46(j),j = 1,ipdstmpllen)
+
+  do j = 1, ipdstmpllen
+     if (ipdstmpl46(j) .ne. ipdstmpl46_old(j)) stop 2
+  end do
+
+  print *, 'SUCCESS!'
+
+end Program test_g2tmpl_pdt4_46