diff --git a/tests/sys/kern/shutdown_dgram.c b/tests/sys/kern/shutdown_dgram.c
index 04382d14f48f..c46c2091a5a0 100644
--- a/tests/sys/kern/shutdown_dgram.c
+++ b/tests/sys/kern/shutdown_dgram.c
@@ -1,111 +1,111 @@
 /*-
  * SPDX-License-Identifier: BSD-2-Clause
  *
  * Copyright (c) 2024 Gleb Smirnoff <glebius@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.
  */
 
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <assert.h>
 #include <errno.h>
 #include <pthread.h>
 #include <unistd.h>
 #include <netinet/in.h>
 
 #include <atf-c.h>
 
 /*
  * shutdown(2) on SOCK_DGRAM shall return ENOTCONN per POSIX.  However, there
  * is historical behavior of the shutdown(2) also unblocking any ongoing
  * recv(2) syscall on the socket.  It is known that some programs rely on this
- * behavior, but exact list of problems isn't known.  Neither we know if the
+ * behavior, but exact list of programs isn't known.  Neither we know if the
  * "feature" is required on PF_UNIX sockets or on PF_INET/INET6 sockets or
  * on both kinds.  Feel free to improve this comment if you know any details.
  *
  * List of relevant commits, bug reports and reviews:
  * 63649db04205
  * https://reviews.freebsd.org/D10351
  * b114aa79596c (regresses)
  * https://reviews.freebsd.org/D3039 (regresses)
  * kern/84761 c5cff17017f9 aada5cccd878
  */
 
 
 static void *
 blocking_thread(void *arg)
 {
 	int *s = arg;
 	char buf[1];
 	int error, rv;
 
 	rv = recv(*s, buf, sizeof(buf), 0);
 	error = (rv == -1) ? errno : 0;
 
 	return ((void *)(uintptr_t)error);
 }
 
 static void
 shutdown_thread(int s)
 {
 	pthread_t t;
 	int rv;
 
 	ATF_REQUIRE(pthread_create(&t, NULL, blocking_thread, &s) == 0);
 	usleep(1000);
 	ATF_REQUIRE(shutdown(s, SHUT_RD) == -1);
 	ATF_REQUIRE(errno == ENOTCONN);
 	ATF_REQUIRE(pthread_join(t, (void *)&rv) == 0);
 	ATF_REQUIRE(rv == 0);
 	close(s);
 }
 
 ATF_TC_WITHOUT_HEAD(unblock);
 ATF_TC_BODY(unblock, tc)
 {
 	static const struct sockaddr_un sun = {
 		.sun_family = AF_LOCAL,
 		.sun_len = sizeof(sun),
 		.sun_path = "shutdown-dgram-test-sock",
 	};
 	int s;
 
 	ATF_REQUIRE((s = socket(PF_UNIX, SOCK_DGRAM, 0)) >= 0);
 	ATF_REQUIRE(bind(s, (struct sockaddr *)&sun, sizeof(sun)) == 0);
 	shutdown_thread(s);
 
 	static const struct sockaddr_in sin = {
 		.sin_family = AF_INET,
 		.sin_len = sizeof(sin),
 	};
 	ATF_REQUIRE((s = socket(PF_INET, SOCK_DGRAM, 0)) >= 0);
 	ATF_REQUIRE(bind(s, (struct sockaddr *)&sin, sizeof(sin)) == 0);
 	shutdown_thread(s);
 }
 
 ATF_TP_ADD_TCS(tp)
 {
 	ATF_TP_ADD_TC(tp, unblock);
 
 	return (atf_no_error());
 }