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diff --git a/tmac/tests/doc_accept-mixed-case-section-headings.sh b/tmac/tests/doc_accept-mixed-case-section-headings.sh
new file mode 100755
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+++ b/tmac/tests/doc_accept-mixed-case-section-headings.sh
@@ -0,0 +1,76 @@
+#!/bin/sh
+#
+# Copyright (C) 2020 Free Software Foundation, Inc.
+#
+# This file is part of groff.
+#
+# groff 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 3 of the License, or
+# (at your option) any later version.
+#
+# groff 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, see <http://www.gnu.org/licenses/>.
+#
+
+groff="${abs_top_builddir:-.}/test-groff"
+
+# Ensure we recognize mixed-case section headings ("Name" as well as
+# "NAME").
+
+EXAMPLE='\
+.Dd September 14, 2020
+.Dt mdoc\-test 7
+.Os
+.Sh Name
+.Nm mdoc\-test
+.Nd a smoke test for groff'"'"'s mdoc implementation
+.Sh Description
+This page has mixed-case section headings.
+.Pp
+This paragraph works around Savannah #59106.
+.Dd September 14, 2020
+.Dt mdoc\-test 7
+.Os
+.Sh NAME
+.Nm mdoc\-test
+.Nd a smoke test for groff'"'"'s mdoc implementation
+.Sh DESCRIPTION
+This page has fully-capitalized section headings.\
+'
+
+OUTPUT=$(printf "%s\n" "$EXAMPLE" | "$groff" -Tascii -P-cbou -mdoc)
+FAIL=
+
+if [ -z "$(echo "$OUTPUT" | sed -n '/Name/{N;/smoke/p;}')" ]
+then
+    FAIL=yes
+    echo "section \"Name\" check failed" >&2
+fi
+
+if [ -z "$(echo "$OUTPUT" | sed -n '/Description/{N;/mixed-case/p;}')" ]
+then
+    FAIL=yes
+    echo "section \"Description\" check failed" >&2
+fi
+
+if [ -z "$(echo "$OUTPUT" | sed -n '/NAME/{N;/smoke/p;}')" ]
+then
+    FAIL=yes
+    echo "section \"NAME\" check failed" >&2
+fi
+
+if [ -z "$(echo "$OUTPUT" | sed -n '/DESCRIPTION/{N;/fully-cap/p;}')" ]
+then
+    FAIL=yes
+    echo "section \"DESCRIPTION\" check failed" >&2
+fi
+
+test -z "$FAIL"
+
+# vim:set ai et sw=4 ts=4 tw=72: