diff --git a/src/tests/fontunderline.t b/src/tests/fontunderline.t
new file mode 100755
index 000000000..5f8a3fe7c
--- /dev/null
+++ b/src/tests/fontunderline.t
@@ -0,0 +1,89 @@
+#! /usr/bin/perl
+################################################################################
+## task - a command line task list manager.
+##
+## Copyright 2006 - 2009, Paul Beckingham.
+## All rights reserved.
+##
+## This program is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free Software
+## Foundation; either version 2 of the License, or (at your option) any later
+## version.
+##
+## This program is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+## FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+## details.
+##
+## You should have received a copy of the GNU General Public License along with
+## this program; if not, write to the
+##
+##     Free Software Foundation, Inc.,
+##     51 Franklin Street, Fifth Floor,
+##     Boston, MA
+##     02110-1301
+##     USA
+##
+################################################################################
+
+use strict;
+use warnings;
+use Test::More tests => 13;
+
+# Create the rc file.
+if (open my $fh, '>', 'font.rc')
+{
+  print $fh "data.location=.\n";
+  close $fh;
+  ok (-r 'font.rc', 'Created font.rc');
+}
+
+# Test the fontunderline config variable.  The following truth table defines
+# the different results which are to be tested.
+#
+#   color  _forcecolor  fontunderline  result
+#   -----  -----------  -------------  ---------
+#       0            0              0  dashes
+#       0            0              1  dashes
+#       0            1              0  dashes
+#       0            1              1  underline
+#       1*           0              0  dashes
+#       1*           0              1  dashes
+#       1*           1              0  dashes
+#       1*           1              1  underline
+#
+# * When ::isatty (fileno (stdout)) is false, color is automatically disabled.
+
+qx{../task rc:font.rc add foo};
+my $output = qx{../task 1 info rc:font.rc rc.color:off rc._forcecolor:off rc.fontunderline:off};
+like   ($output, qr/--------/, '0,0,0 -> dashes');
+$output = qx{../task 1 info rc:font.rc rc.color:off rc._forcecolor:off rc.fontunderline:on};
+like   ($output, qr/--------/, '0,0,1 -> dashes');
+$output = qx{../task 1 info rc:font.rc rc.color:off rc._forcecolor:on rc.fontunderline:off};
+like   ($output, qr/--------/, '0,1,0 -> dashes');
+$output = qx{../task 1 info rc:font.rc rc.color:off rc._forcecolor:on rc.fontunderline:on};
+unlike ($output, qr/--------/, '0,1,1 -> underline');
+$output = qx{../task 1 info rc:font.rc rc.color:on rc._forcecolor:off rc.fontunderline:off};
+like   ($output, qr/--------/, '1,0,0 -> dashes');
+$output = qx{../task 1 info rc:font.rc rc.color:on rc._forcecolor:off rc.fontunderline:on};
+like   ($output, qr/--------/, '1,0,1 -> dashes');
+$output = qx{../task 1 info rc:font.rc rc.color:on rc._forcecolor:on rc.fontunderline:off};
+like   ($output, qr/--------/, '1,1,0 -> dashes');
+$output = qx{../task 1 info rc:font.rc rc.color:on rc._forcecolor:on rc.fontunderline:on};
+unlike ($output, qr/--------/, '1,1,1 -> underline');
+
+# Cleanup.
+unlink 'pending.data';
+ok (!-r 'pending.data', 'Removed pending.data');
+
+unlink 'completed.data';
+ok (!-r 'completed.data', 'Removed completed.data');
+
+unlink 'undo.data';
+ok (!-r 'undo.data', 'Removed undo.data');
+
+unlink 'font.rc';
+ok (!-r 'font.rc', 'Removed font.rc');
+
+exit 0;
+