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diff --git a/tmac/tests/an_use-input-traps-correctly.sh b/tmac/tests/an_use-input-traps-correctly.sh
new file mode 100755
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+++ b/tmac/tests/an_use-input-traps-correctly.sh
@@ -0,0 +1,113 @@
+#!/bin/sh
+#
+# Copyright (C) 2022 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="${abs_top_builddir:-.}/test-groff"
+
+fail=
+
+wail () {
+    echo "...FAILED" >&2
+    fail=YES
+}
+
+# Ensure that input trap-using macros employ the correct request.  B, I,
+# SH, SS, SM, and SB need `it`; TP needs `itc`.
+
+# B
+
+input=".TH foo 1 2022-06-07 \"groff test suite\"
+.B \\\\n[.fn]\c
+\\n[.fn]"
+
+output=$(printf "%s\n" "$input" | "$groff" -man -Tascii -P-cbou 2>&1)
+
+echo "checking that B macro uses correct input trap 'it'" >&2
+echo "$output" | grep -Fqx 'BR' || wail
+
+# I
+
+input=".TH foo 1 2022-06-07 \"groff test suite\"
+.I \\\\n[.fn]\c
+\\n[.fn]"
+
+output=$(printf "%s\n" "$input" | "$groff" -man -Tascii -P-cbou 2>&1)
+
+echo "checking that I macro uses correct input trap 'it'" >&2
+echo "$output" | grep -Fqx 'IR' || wail
+
+# SH
+
+input=".TH foo 1 2022-06-07 \"groff test suite\"
+.SH Name\c
+foo \- frobnicate a bar"
+
+output=$(printf "%s\n" "$input" | "$groff" -man -Tascii -P-cbou 2>&1)
+
+echo "checking that SH macro uses correct input trap 'it'" >&2
+echo "$output" | grep -Fqx 'Name' || wail
+
+# SS
+
+input=".TH foo 1 2022-06-07 \"groff test suite\"
+.SS Limitations\c
+Lorem ipsum gitsum voluptatem."
+
+output=$(printf "%s\n" "$input" | "$groff" -man -Tascii -P-cbou 2>&1)
+
+echo "checking that SS macro uses correct input trap 'it'" >&2
+echo "$output" | grep -Fqx '   Limitations' || wail # 3 spaces
+
+# SM
+
+input=".TH foo 1 2022-06-07 \"groff test suite\"
+.SM \\\\n[.s]\c
+\\n[.s]"
+
+output=$(printf "%s\n" "$input" | "$groff" -man -a -Tps 2>&1)
+
+echo "checking that SM macro uses correct input trap 'it'" >&2
+echo "$output" | grep -Fqx '910' || wail
+
+# SB
+
+input=".TH foo 1 2022-06-07 \"groff test suite\"
+.SB \\\\n[.fn]\\\\n[.s]\c
+\\n[.fn]\\n[.s]"
+
+output=$(printf "%s\n" "$input" | "$groff" -man -a -Tps 2>&1)
+
+echo "checking that SB macro uses correct input trap 'it'" >&2
+echo "$output" | grep -Fqx 'TB9TR10' || wail
+
+# TP
+
+input=".TH foo 1 2022-06-07 \"groff test suite\"
+.TP
+.BR \-\-bar [ =\c
+.IR baz ]"
+
+output=$(printf "%s\n" "$input" | "$groff" -man -Tascii -P-cbou 2>&1)
+
+echo "checking that TP macro uses correct input trap 'itc'" >&2
+echo "$output" | grep -Fqx '       --bar[=baz]' || wail # 7 spaces
+
+test -z "$fail"
+
+# vim:set ai et sw=4 ts=4 tw=72: