diff --git a/usr.bin/grep/tests/grep_freebsd_test.sh b/usr.bin/grep/tests/grep_freebsd_test.sh
index 52455cd1d653..0d068d5d1c65 100755
--- a/usr.bin/grep/tests/grep_freebsd_test.sh
+++ b/usr.bin/grep/tests/grep_freebsd_test.sh
@@ -1,113 +1,100 @@
 #
 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 #
 # Copyright (c) 2017 Kyle Evans <kevans@FreeBSD.org>
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
 # $FreeBSD$
 
 # What grep(1) are we working with?
 # - 0 : bsdgrep
-# - 1 : gnu grep 2.51 (base)
-# - 2 : gnu grep (ports)
+# - 1 : gnu grep (ports)
 GREP_TYPE_BSD=0
-GREP_TYPE_GNU_FREEBSD=1
-GREP_TYPE_GNU=2
-GREP_TYPE_UNKNOWN=3
+GREP_TYPE_GNU=1
 
 grep_type()
 {
 	local grep_version=$(grep --version)
 
 	case "$grep_version" in
 	*"BSD grep"*)
 		return $GREP_TYPE_BSD
 		;;
 	*"GNU grep"*)
-		case "$grep_version" in
-		*2.5.1-FreeBSD*)
-			return $GREP_TYPE_GNU_FREEBSD
-			;;
-		*)
-			return $GREP_TYPE_GNU
-			;;
-		esac
+		return $GREP_TYPE_GNU
 		;;
 	esac
 	atf_fail "unknown grep type: $grep_version"
 }
 
 atf_test_case grep_r_implied
 grep_r_implied_body()
 {
 	grep_type
 	if [ $? -ne $GREP_TYPE_BSD ]; then
 		atf_skip "this test only works with bsdgrep(1)"
 	fi
 
 	(cd "$(atf_get_srcdir)" && grep -r --exclude="*.out" -e "test" .) > d_grep_r_implied.out
 
 	atf_check -s exit:0 -x \
 	    "(cd $(atf_get_srcdir) && grep -r --exclude=\"*.out\" -e \"test\") | diff d_grep_r_implied.out -"
 }
 
 atf_test_case rgrep
 rgrep_head()
 {
 	atf_set "require.progs" "rgrep"
 }
 rgrep_body()
 {
 	atf_check -o save:d_grep_r_implied.out grep -r --exclude="*.out" -e "test" "$(atf_get_srcdir)"
 	atf_check -o file:d_grep_r_implied.out rgrep --exclude="*.out" -e "test" "$(atf_get_srcdir)"
 }
 
 atf_test_case gnuext
 gnuext_body()
 {
 	grep_type
 	_type=$?
-	if [ $_type -eq $GREP_TYPE_GNU_FREEBSD ]; then
-		atf_expect_fail "\\s and \\S are known to be buggy in base gnugrep"
-	fi
 
 	atf_check -o save:grep_alnum.out grep -o '[[:alnum:]]' /COPYRIGHT
 	atf_check -o file:grep_alnum.out grep -o '\w' /COPYRIGHT
 
 	atf_check -o save:grep_nalnum.out grep -o '[^[:alnum:]]' /COPYRIGHT
 	atf_check -o file:grep_nalnum.out grep -o '\W' /COPYRIGHT
 
 	atf_check -o save:grep_space.out grep -o '[[:space:]]' /COPYRIGHT
 	atf_check -o file:grep_space.out grep -o '\s' /COPYRIGHT
 
 	atf_check -o save:grep_nspace.out grep -o '[^[:space:]]' /COPYRIGHT
 	atf_check -o file:grep_nspace.out grep -o '\S' /COPYRIGHT
 
 }
 
 atf_init_test_cases()
 {
 	atf_add_test_case grep_r_implied
 	atf_add_test_case rgrep
 	atf_add_test_case gnuext
 }