1 files changed, 14 insertions, 0 deletions

diff --git a/usr.sbin/pw/tests/pw_modify.sh b/usr.sbin/pw/tests/pw_modify.sh
index 5888111933ea..b81f105d92be 100755
--- a/usr.sbin/pw/tests/pw_modify.sh
+++ b/usr.sbin/pw/tests/pw_modify.sh
@@ -58,9 +58,23 @@ usermod_bug_185666_body() {
 	atf_check -o inline:"testgroup2:*:1003:testuser\n" -x pw -V ${HOME} groupshow testgroup2
 }
 
+atf_test_case do_not_duplicate_group_on_gid_change
+do_not_duplicate_group_on_gid_change_head() {
+	atf_set "descr" "Do not duplicate group on gid change"
+}
+
+do_not_duplicate_group_on_gid_change_body() {
+	populate_etc_skel
+	atf_check -s exit:0 -x pw -V ${HOME} groupadd testgroup
+	atf_check -s exit:0 -x pw -V ${HOME} groupmod testgroup -g 12345
+	# use grep to see if the entry has not be duplicated
+	atf_check -o inline:"testgroup:*:12345:\n" -s exit:0 -x grep "^testgroup" ${HOME}/group
+}
+
 atf_init_test_cases() {
 	atf_add_test_case groupmod_user
 	atf_add_test_case groupmod_invalid_user
 	atf_add_test_case groupmod_bug_193704
 	atf_add_test_case usermod_bug_185666
+	atf_add_test_case do_not_duplicate_group_on_gid_change
 }