diff --git a/tests/qemu-iotests/055 b/tests/qemu-iotests/055
index c66f8db..ff7d22c 100755
--- a/tests/qemu-iotests/055
+++ b/tests/qemu-iotests/055
@@ -23,7 +23,7 @@
 import time
 import os
 import iotests
-from iotests import qemu_img, qemu_io
+from iotests import qemu_img, qemu_io, create_image
 
 test_img = os.path.join(iotests.test_dir, 'test.img')
 target_img = os.path.join(iotests.test_dir, 'target.img')
@@ -34,7 +34,7 @@ class TestSingleDrive(iotests.QMPTestCase):
     def setUp(self):
         # Write data to the image so we can compare later
         qemu_img('create', '-f', iotests.imgfmt, test_img, str(TestSingleDrive.image_len))
-        qemu_io('-c', 'write -P0x5d 0 64k', test_img)
+        qemu_io('-c', 'write -P0x41 0 512', test_img)
         qemu_io('-c', 'write -P0xd5 1M 32k', test_img)
         qemu_io('-c', 'write -P0xdc 32M 124k', test_img)
         qemu_io('-c', 'write -P0xdc 67043328 64k', test_img)
@@ -60,6 +60,22 @@ class TestSingleDrive(iotests.QMPTestCase):
         event = self.cancel_and_wait()
         self.assert_qmp(event, 'data/type', 'backup')
 
+    def test_cancel_sync_none(self):
+        self.assert_no_active_block_jobs()
+
+        result = self.vm.qmp('drive-backup', device='drive0',
+                             sync='none', target=target_img)
+        self.assert_qmp(result, 'return', {})
+        time.sleep(1)
+        self.vm.hmp_qemu_io('drive0', 'write -P0x5e 0 512')
+        self.vm.hmp_qemu_io('drive0', 'aio_flush')
+        time.sleep(1)
+        # Verify that the original contents exist in the target image.
+        self.assertEqual(-1, qemu_io('-c', 'read -P0x41 0 512', target_img).find("verification failed"))
+
+        event = self.cancel_and_wait()
+        self.assert_qmp(event, 'data/type', 'backup')
+
     def test_pause(self):
         self.assert_no_active_block_jobs()
 
@@ -97,6 +113,12 @@ class TestSingleDrive(iotests.QMPTestCase):
                              target=target_img, sync='full', mode='existing')
         self.assert_qmp(result, 'error/class', 'GenericError')
 
+    def test_invalid_format(self):
+        result = self.vm.qmp('drive-backup', device='drive0',
+                             target=target_img, sync='full',
+                             format='spaghetti-noodles')
+        self.assert_qmp(result, 'error/class', 'GenericError')
+
     def test_device_not_found(self):
         result = self.vm.qmp('drive-backup', device='nonexistent',
                              target=target_img, sync='full')
diff --git a/tests/qemu-iotests/055.out b/tests/qemu-iotests/055.out
index fa16b5c..96961ed 100644
--- a/tests/qemu-iotests/055.out
+++ b/tests/qemu-iotests/055.out
@@ -1,5 +1,5 @@
-.............
+...............
 ----------------------------------------------------------------------
-Ran 13 tests
+Ran 15 tests
 
 OK
diff --git a/tests/qemu-iotests/056 b/tests/qemu-iotests/056
new file mode 100755
index 0000000..a0a3f02
--- /dev/null
+++ b/tests/qemu-iotests/056
@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+#
+# Tests for drive-backup
+#
+# Copyright (C) 2013 Red Hat, Inc.
+#
+# Based on 041.
+#
+# This program 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 2 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import time
+import os
+import iotests
+from iotests import qemu_img, qemu_io, create_image
+
+backing_img = os.path.join(iotests.test_dir, 'backing.img')
+test_img = os.path.join(iotests.test_dir, 'test.img')
+target_img = os.path.join(iotests.test_dir, 'target.img')
+
+class TestSyncModeTop(iotests.QMPTestCase):
+    image_len = 2 * 1024 * 1024 # MB
+
+    def setUp(self):
+        create_image(backing_img, TestSyncModeTop.image_len)
+        qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
+        qemu_io('-c', 'write -P0x5d 0 64k', test_img)
+        qemu_io('-c', 'write -P0xd5 1M 32k', test_img)
+        qemu_io('-c', 'write -P0xdc 32M 124k', test_img)
+        self.vm = iotests.VM().add_drive(test_img)
+        self.vm.launch()
+
+    def tearDown(self):
+        self.vm.shutdown()
+        os.remove(test_img)
+        os.remove(backing_img)
+        try:
+            os.remove(target_img)
+        except OSError:
+            pass
+
+    def test_complete_top(self):
+        self.assert_no_active_block_jobs()
+        result = self.vm.qmp('drive-backup', device='drive0', sync='top',
+                             format=iotests.imgfmt, target=target_img)
+        self.assert_qmp(result, 'return', {})
+
+        # Custom completed check as we are not copying all data.
+        completed = False
+        while not completed:
+            for event in self.vm.get_qmp_events(wait=True):
+                if event['event'] == 'BLOCK_JOB_COMPLETED':
+                    self.assert_qmp(event, 'data/device', 'drive0')
+                    self.assert_qmp_absent(event, 'data/error')
+                    completed = True
+
+        self.assert_no_active_block_jobs()
+        self.vm.shutdown()
+        self.assertTrue(iotests.compare_images(test_img, target_img),
+                        'target image does not match source after backup')
+
+if __name__ == '__main__':
+    iotests.main(supported_fmts=['qcow2', 'qed'])
diff --git a/tests/qemu-iotests/056.out b/tests/qemu-iotests/056.out
new file mode 100644
index 0000000..ae1213e
--- /dev/null
+++ b/tests/qemu-iotests/056.out
@@ -0,0 +1,5 @@
+.
+----------------------------------------------------------------------
+Ran 1 tests
+
+OK
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index fdc6ed1..b1d03c7 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -62,3 +62,4 @@
 053 rw auto
 054 rw auto
 055 rw auto
+056 rw auto backing
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index b028a89..33ad0ec 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -95,6 +95,11 @@ class VM(object):
         self._num_drives += 1
         return self
 
+    def hmp_qemu_io(self, drive, cmd):
+        '''Write to a given drive using an HMP command'''
+        return self.qmp('human-monitor-command',
+                        command_line='qemu-io %s "%s"' % (drive, cmd))
+
     def add_fd(self, fd, fdset, opaque, opts=''):
         '''Pass a file descriptor to the VM'''
         options = ['fd=%d' % fd,
