diff --git a/test_fms/mpp/test_stdlog.F90 b/test_fms/mpp/test_stdlog.F90
index f8a9bc6d4..61ee8d81c 100644
--- a/test_fms/mpp/test_stdlog.F90
+++ b/test_fms/mpp/test_stdlog.F90
@@ -83,6 +83,8 @@ subroutine check_write()
     do i=1, 7
       read(u_num_warn, '(A)') line
       if (trim(line) == '') cycle
+      !! if we're testing with the old io enabled, we'll have some additional output we can skip
+      if (trim(line) == 'NOTE from PE     0: MPP_IO_SET_STACK_SIZE: stack size set to     131072.') cycle
       if(trim(line) .ne. trim(ref_line(ref_num))) call mpp_error(FATAL, "warnfile output does not match reference data"&
                                                                 //"reference line:"//ref_line(ref_num) &
                                                                 //"output line:"//line)
@@ -91,4 +93,5 @@ subroutine check_write()
     close(u_num_warn)
   end subroutine check_write
 
-end program test_stdlog
\ No newline at end of file
+end program test_stdlog
+