diff --git a/sbin/md5/tests/md5_test.sh b/sbin/md5/tests/md5_test.sh
--- a/sbin/md5/tests/md5_test.sh
+++ b/sbin/md5/tests/md5_test.sh
@@ -369,6 +369,24 @@
 
 }
 
+atf_test_case gnu_cflag_mode
+gnu_cflag_mode_head()
+{
+	atf_set descr "Verify handling of input modes in GNU check mode"
+	atf_set require.progs "sha1sum"
+}
+gnu_cflag_mode_body()
+{
+	printf "The Magic Words are 01010011 01001111\r\n" >input
+	cat >digests <<EOF
+53d88300dfb2be42f0ef25e3d9de798e31bb7e69 *input
+53d88300dfb2be42f0ef25e3d9de798e31bb7e69  input
+2290cf6ba4ac5387e520088de760b71a523871b0 ^input
+c1065e0d2bbc1c67dcecee0187d61316fb9c5582 Uinput
+EOF
+	atf_check sha1sum --quiet --check digests
+}
+
 atf_init_test_cases()
 {
 	for alg in $algorithms ; do
@@ -383,4 +401,5 @@
 	done
 	atf_add_test_case gnu_bflag
 	atf_add_test_case gnu_cflag
+	atf_add_test_case gnu_cflag_mode
 }