diff --git a/ChangeLog b/ChangeLog
index 63e63f9ad..6cbf04a70 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2013-12-15  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	New functional test for sleep function.
+
+	This test allows to check sleep without qemu. Keep qemu version as
+	well as functional test won't notice if all clocks are going too fast
+	or too slow.
+
 2013-12-15  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Add explicit sysv_abi on amd64 asm routines.
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index a550032a3..4102e73ba 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -1932,6 +1932,11 @@ module = {
   common = tests/signatures.h;
 };
 
+module = {
+  name = sleep_test;
+  common = tests/sleep_test.c;
+};
+
 module = {
   name = xnu_uuid_test;
   common = tests/xnu_uuid_test.c;
diff --git a/grub-core/tests/lib/functional_test.c b/grub-core/tests/lib/functional_test.c
index b99cb5f68..5be7a58e5 100644
--- a/grub-core/tests/lib/functional_test.c
+++ b/grub-core/tests/lib/functional_test.c
@@ -64,6 +64,7 @@ grub_functional_all_tests (grub_extcmd_context_t ctxt __attribute__ ((unused)),
   grub_dl_load ("xnu_uuid_test");
   grub_dl_load ("pbkdf2_test");
   grub_dl_load ("signature_test");
+  grub_dl_load ("sleep_test");
 
   FOR_LIST_ELEMENTS (test, grub_test_list)
     ok = !grub_test_run (test) && ok;
diff --git a/grub-core/tests/sleep_test.c b/grub-core/tests/sleep_test.c
new file mode 100644
index 000000000..98ea57262
--- /dev/null
+++ b/grub-core/tests/sleep_test.c
@@ -0,0 +1,45 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2013  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/time.h>
+#include <grub/misc.h>
+#include <grub/dl.h>
+#include <grub/command.h>
+#include <grub/env.h>
+#include <grub/test.h>
+#include <grub/mm.h>
+#include <grub/datetime.h>
+#include <grub/time.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static void
+sleep_test (void)
+{
+  struct grub_datetime st, en;
+  grub_int32_t stu, enu;
+  grub_test_assert (!grub_get_datetime (&st), "Couldn't retrieve start time");
+  grub_millisleep (10000);
+  grub_test_assert (!grub_get_datetime (&en), "Couldn't retrieve end time");
+  grub_test_assert (grub_datetime2unixtime (&st, &stu), "Invalid date");
+  grub_test_assert (grub_datetime2unixtime (&en, &enu), "Invalid date");
+  grub_test_assert (enu - stu >= 9 && enu - stu <= 11, "Interval out of range: %d", enu-stu);
+
+}
+
+GRUB_FUNCTIONAL_TEST (sleep_test, sleep_test);