diff --git a/tests/.gitignore b/tests/.gitignore
index 34a86a2..aca8128 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -22,6 +22,7 @@
 mmap64
 mmsg
 mq
+nanosleep
 net-accept-connect
 netlink_inet_diag
 netlink_unix_diag
diff --git a/tests/Makefile.am b/tests/Makefile.am
index e699086..dbe4511 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -35,6 +35,7 @@
 	mmap64 \
 	mmsg \
 	mq \
+	nanosleep \
 	net-accept-connect \
 	netlink_inet_diag \
 	netlink_unix_diag \
@@ -144,6 +145,7 @@
 	mmap.test \
 	mmap64.test \
 	mmsg.test \
+	nanosleep.test \
 	net.test \
 	net-fd.test \
 	net-yy.test \
diff --git a/tests/nanosleep.c b/tests/nanosleep.c
new file mode 100644
index 0000000..07b1d37
--- /dev/null
+++ b/tests/nanosleep.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 <stdio.h>
+#include <stdint.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/time.h>
+
+static void
+handler(int signo)
+{
+}
+
+int
+main(void)
+{
+	struct {
+		struct timespec ts;
+		uint32_t pad[2];
+	} req = {
+		.ts = { .tv_nsec = 0xc0de1 },
+		.pad = { 0xdeadbeef, 0xbadc0ded }
+	}, rem = {
+		.ts = { .tv_sec = 0xc0de2, .tv_nsec = 0xc0de3 },
+		.pad = { 0xdeadbeef, 0xbadc0ded }
+	};
+	const sigset_t set = {};
+	const struct sigaction act = { .sa_handler = handler };
+	const struct itimerval itv = { .it_value.tv_usec = 111111 };
+
+	if (nanosleep(&req.ts, NULL))
+		return 77;
+	printf("nanosleep({%jd, %jd}, NULL) = 0\n",
+	       (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec);
+
+	if (!nanosleep(NULL, &rem.ts))
+		return 77;
+	printf("nanosleep(NULL, %p) = -1 EFAULT (Bad address)\n", &rem.ts);
+
+	if (nanosleep(&req.ts, &rem.ts))
+		return 77;
+	printf("nanosleep({%jd, %jd}, %p) = 0\n",
+	       (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec, &rem.ts);
+
+	req.ts.tv_nsec = 1000000000;
+	if (!nanosleep(&req.ts, &rem.ts))
+		return 77;
+	printf("nanosleep({%jd, %jd}, %p) = -1 EINVAL (Invalid argument)\n",
+	       (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec, &rem.ts);
+
+	if (sigaction(SIGALRM, &act, NULL))
+		return 77;
+	if (sigprocmask(SIG_SETMASK, &set, NULL))
+		return 77;
+
+	if (setitimer(ITIMER_REAL, &itv, NULL))
+		return 77;
+	printf("setitimer(ITIMER_REAL, {it_interval={%jd, %jd}"
+	       ", it_value={%jd, %jd}}, NULL) = 0\n",
+	       (intmax_t) itv.it_interval.tv_sec,
+	       (intmax_t) itv.it_interval.tv_usec,
+	       (intmax_t) itv.it_value.tv_sec,
+	       (intmax_t) itv.it_value.tv_usec);
+
+	req.ts.tv_nsec = 999999999;
+	if (!nanosleep(&req.ts, &rem.ts))
+		return 77;
+	printf("nanosleep({%jd, %jd}, {%jd, %jd})"
+	       " = ? ERESTART_RESTARTBLOCK (Interrupted by signal)\n",
+	       (intmax_t) req.ts.tv_sec, (intmax_t) req.ts.tv_nsec,
+	       (intmax_t) rem.ts.tv_sec, (intmax_t) rem.ts.tv_nsec);
+	puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---");
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
diff --git a/tests/nanosleep.test b/tests/nanosleep.test
new file mode 100755
index 0000000..215f8a6
--- /dev/null
+++ b/tests/nanosleep.test
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# Check nanosleep syscall decoding.
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+syscalls=nanosleep,setitimer
+run_strace -a20 -e trace=$syscalls $args > "$OUT"
+match_diff "$OUT" "$LOG"
+rm -f "$OUT"
+
+exit 0