Merge remote-tracking branch 'remotes/ehabkost/tags/python-next-pull-request' into staging

Python queue, 2018-10-30

* Makefile rule for running acceptance tests
  (make check-acceptance) (Cleber Rosa)
* Make iotests compatible with Python 3
  (Max Reitz)
* device-crash-test whitelist update (Thomas Huth)
* Misc cleanups (Cleber Rosa)

# gpg: Signature made Wed 31 Oct 2018 00:28:39 GMT
# gpg:                using RSA key 2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/python-next-pull-request:
  scripts/qemu.py: use a more consistent docstring style
  scripts/decodetree.py: fix reference to attributes
  Travis support for the acceptance tests
  Acceptance tests: add make rule for running them
  Bootstrap Python venv for tests
  iotests: Unify log outputs between Python 2 and 3
  iotests: Modify imports for Python 3
  iotests: 'new' module replacement in 169
  iotests: Explicitly bequeath FDs in Python
  iotests: Different iterator behavior in Python 3
  iotests: Use // for Python integer division
  iotests: Use Python byte strings where appropriate
  iotests: Flush in iotests.py's QemuIoInteractive
  iotests: Make nbd-fault-injector flush
  scripts/device-crash-test: Remove devices that are not user_creatable anymore

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/.travis.yml b/.travis.yml
index 95be6ec..aa49c7b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -117,6 +117,14 @@
     - env: CONFIG="--target-list=x86_64-softmmu"
       python:
         - "3.6"
+    # Acceptance (Functional) tests
+    - env: CONFIG="--python=/usr/bin/python3 --target-list=x86_64-softmmu"
+           TEST_CMD="make AVOCADO_SHOW=app check-acceptance"
+      addons:
+        apt:
+          packages:
+            - python3-pip
+            - python3.4-venv
     # Using newer GCC with sanitizers
     - addons:
         apt:
diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst
index a227754..18e2c08 100644
--- a/docs/devel/testing.rst
+++ b/docs/devel/testing.rst
@@ -545,10 +545,39 @@
    - http://avocado-framework.readthedocs.io/en/latest/api/test/avocado.html#avocado.Test
    - http://avocado-framework.readthedocs.io/en/latest/api/utils/avocado.utils.html
 
-Installation
-------------
+Running tests
+-------------
 
-To install Avocado and its dependencies, run:
+You can run the acceptance tests simply by executing:
+
+.. code::
+
+  make check-acceptance
+
+This involves the automatic creation of Python virtual environment
+within the build tree (at ``tests/venv``) which will have all the
+right dependencies, and will save tests results also within the
+build tree (at ``tests/results``).
+
+Note: the build environment must be using a Python 3 stack, and have
+the ``venv`` and ``pip`` packages installed.  If necessary, make sure
+``configure`` is called with ``--python=`` and that those modules are
+available.  On Debian and Ubuntu based systems, depending on the
+specific version, they may be on packages named ``python3-venv`` and
+``python3-pip``.
+
+The scripts installed inside the virtual environment may be used
+without an "activation".  For instance, the Avocado test runner
+may be invoked by running:
+
+ .. code::
+
+  tests/venv/bin/avocado run $OPTION1 $OPTION2 tests/acceptance/
+
+Manual Installation
+-------------------
+
+To manually install Avocado and its dependencies, run:
 
 .. code::
 
@@ -689,11 +718,15 @@
 Uninstalling Avocado
 --------------------
 
-If you've followed the installation instructions above, you can easily
-uninstall Avocado.  Start by listing the packages you have installed::
+If you've followed the manual installation instructions above, you can
+easily uninstall Avocado.  Start by listing the packages you have
+installed::
 
   pip list --user
 
 And remove any package you want with::
 
   pip uninstall <package_name>
+
+If you've used ``make check-acceptance``, the Python virtual environment where
+Avocado is installed will be cleaned up as part of ``make check-clean``.
diff --git a/scripts/decodetree.py b/scripts/decodetree.py
index 457cffe..37c76b5 100755
--- a/scripts/decodetree.py
+++ b/scripts/decodetree.py
@@ -298,7 +298,7 @@
             s = 's'
         else:
             s = ''
-        return str(pos) + ':' + s + str(len)
+        return str(self.pos) + ':' + s + str(self.len)
 
     def str_extract(self):
         if self.sign:
diff --git a/scripts/device-crash-test b/scripts/device-crash-test
index 930200b..e93a7c0 100755
--- a/scripts/device-crash-test
+++ b/scripts/device-crash-test
@@ -72,21 +72,6 @@
     # devices that don't work out of the box because they require extra options to "-device DEV":
     #            DEVICE                                    | ERROR MESSAGE
     {'device':'.*-(i386|x86_64)-cpu', 'expected':True},    # CPU socket-id is not set
-    {'device':'ARM,bitband-memory', 'expected':True},      # source-memory property not set
-    {'device':'arm.cortex-a9-global-timer', 'expected':True}, # a9_gtimer_realize: num-cpu must be between 1 and 4
-    {'device':'arm_mptimer', 'expected':True},             # num-cpu must be between 1 and 4
-    {'device':'armv7m', 'expected':True},                  # memory property was not set
-    {'device':'aspeed.scu', 'expected':True},              # Unknown silicon revision: 0x0
-    {'device':'aspeed.sdmc', 'expected':True},             # Unknown silicon revision: 0x0
-    {'device':'bcm2835-dma', 'expected':True},             # bcm2835_dma_realize: required dma-mr link not found: Property '.dma-mr' not found
-    {'device':'bcm2835-fb', 'expected':True},              # bcm2835_fb_realize: required vcram-base property not set
-    {'device':'bcm2835-mbox', 'expected':True},            # bcm2835_mbox_realize: required mbox-mr link not found: Property '.mbox-mr' not found
-    {'device':'bcm2835-peripherals', 'expected':True},     # bcm2835_peripherals_realize: required ram link not found: Property '.ram' not found
-    {'device':'bcm2835-property', 'expected':True},        # bcm2835_property_realize: required fb link not found: Property '.fb' not found
-    {'device':'bcm2835_gpio', 'expected':True},            # bcm2835_gpio_realize: required sdhci link not found: Property '.sdbus-sdhci' not found
-    {'device':'bcm2836', 'expected':True},                 # bcm2836_realize: required ram link not found: Property '.ram' not found
-    {'device':'cfi.pflash01', 'expected':True},            # attribute "sector-length" not specified or zero.
-    {'device':'cfi.pflash02', 'expected':True},            # attribute "sector-length" not specified or zero.
     {'device':'icp', 'expected':True},                     # icp_realize: required link 'xics' not found: Property '.xics' not found
     {'device':'ics', 'expected':True},                     # ics_base_realize: required link 'xics' not found: Property '.xics' not found
     # "-device ide-cd" does work on more recent QEMU versions, so it doesn't have expected=True
@@ -108,7 +93,6 @@
     {'device':'pc-dimm', 'expected':True},                 # 'memdev' property is not set
     {'device':'pci-bridge', 'expected':True},              # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
     {'device':'pci-bridge-seat', 'expected':True},         # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
-    {'device':'pxa2xx-dma', 'expected':True},              # channels value invalid
     {'device':'pxb', 'expected':True},                     # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
     {'device':'scsi-block', 'expected':True},              # drive property not set
     {'device':'scsi-disk', 'expected':True},               # drive property not set
@@ -145,7 +129,6 @@
     {'device':'virtio-input-host-pci', 'expected':True},   # evdev property is required
     {'device':'xen-pvdevice', 'expected':True},            # Device ID invalid, it must always be supplied
     {'device':'vhost-vsock-ccw', 'expected':True},         # guest-cid property must be greater than 2
-    {'device':'ALTR.timer', 'expected':True},              # "clock-frequency" property must be provided
     {'device':'zpci', 'expected':True},                    # target must be defined
     {'device':'pnv-(occ|icp|lpc)', 'expected':True},       # required link 'xics' not found: Property '.xics' not found
     {'device':'powernv-cpu-.*', 'expected':True},          # pnv_core_realize: required link 'xics' not found: Property '.xics' not found
diff --git a/scripts/qemu.py b/scripts/qemu.py
index fd4249f..6e3b0e6 100644
--- a/scripts/qemu.py
+++ b/scripts/qemu.py
@@ -59,9 +59,9 @@
     """
 
 class MonitorResponseError(qmp.qmp.QMPError):
-    '''
+    """
     Represents erroneous QMP monitor reply
-    '''
+    """
     def __init__(self, reply):
         try:
             desc = reply["error"]["desc"]
@@ -72,14 +72,15 @@
 
 
 class QEMUMachine(object):
-    '''A QEMU VM
+    """
+    A QEMU VM
 
     Use this object as a context manager to ensure the QEMU process terminates::
 
         with VM(binary) as vm:
             ...
         # vm is guaranteed to be shut down here
-    '''
+    """
 
     def __init__(self, binary, args=None, wrapper=None, name=None,
                  test_dir="/var/tmp", monitor_address=None,
@@ -141,18 +142,28 @@
         self._args.append(args)
 
     def add_fd(self, fd, fdset, opaque, opts=''):
-        '''Pass a file descriptor to the VM'''
+        """
+        Pass a file descriptor to the VM
+        """
         options = ['fd=%d' % fd,
                    'set=%d' % fdset,
                    'opaque=%s' % opaque]
         if opts:
             options.append(opts)
 
+        # This did not exist before 3.4, but since then it is
+        # mandatory for our purpose
+        if hasattr(os, 'set_inheritable'):
+            os.set_inheritable(fd, True)
+
         self._args.append('-add-fd')
         self._args.append(','.join(options))
         return self
 
-    def send_fd_scm(self, fd_file_path):
+    # Exactly one of fd and file_path must be given.
+    # (If it is file_path, the helper will open that file and pass its
+    # own fd)
+    def send_fd_scm(self, fd=None, file_path=None):
         # In iotest.py, the qmp should always use unix socket.
         assert self._qmp.is_scm_available()
         if self._socket_scm_helper is None:
@@ -160,12 +171,27 @@
         if not os.path.exists(self._socket_scm_helper):
             raise QEMUMachineError("%s does not exist" %
                                    self._socket_scm_helper)
+
+        # This did not exist before 3.4, but since then it is
+        # mandatory for our purpose
+        if hasattr(os, 'set_inheritable'):
+            os.set_inheritable(self._qmp.get_sock_fd(), True)
+            if fd is not None:
+                os.set_inheritable(fd, True)
+
         fd_param = ["%s" % self._socket_scm_helper,
-                    "%d" % self._qmp.get_sock_fd(),
-                    "%s" % fd_file_path]
+                    "%d" % self._qmp.get_sock_fd()]
+
+        if file_path is not None:
+            assert fd is None
+            fd_param.append(file_path)
+        else:
+            assert fd is not None
+            fd_param.append(str(fd))
+
         devnull = open(os.path.devnull, 'rb')
         proc = subprocess.Popen(fd_param, stdin=devnull, stdout=subprocess.PIPE,
-                                stderr=subprocess.STDOUT)
+                                stderr=subprocess.STDOUT, close_fds=False)
         output = proc.communicate()[0]
         if output:
             LOG.debug(output)
@@ -174,7 +200,9 @@
 
     @staticmethod
     def _remove_if_exists(path):
-        '''Remove file object at path if it exists'''
+        """
+        Remove file object at path if it exists
+        """
         try:
             os.remove(path)
         except OSError as exception:
@@ -277,7 +305,9 @@
             raise
 
     def _launch(self):
-        '''Launch the VM and establish a QMP connection'''
+        """
+        Launch the VM and establish a QMP connection
+        """
         devnull = open(os.path.devnull, 'rb')
         self._pre_launch()
         self._qemu_full_args = (self._wrapper + [self._binary] +
@@ -286,18 +316,23 @@
                                        stdin=devnull,
                                        stdout=self._qemu_log_file,
                                        stderr=subprocess.STDOUT,
-                                       shell=False)
+                                       shell=False,
+                                       close_fds=False)
         self._post_launch()
 
     def wait(self):
-        '''Wait for the VM to power off'''
+        """
+        Wait for the VM to power off
+        """
         self._popen.wait()
         self._qmp.close()
         self._load_io_log()
         self._post_shutdown()
 
     def shutdown(self):
-        '''Terminate the VM and clean up'''
+        """
+        Terminate the VM and clean up
+        """
         if self.is_running():
             try:
                 self._qmp.cmd('quit')
@@ -321,7 +356,9 @@
         self._launched = False
 
     def qmp(self, cmd, conv_keys=True, **args):
-        '''Invoke a QMP command and return the response dict'''
+        """
+        Invoke a QMP command and return the response dict
+        """
         qmp_args = dict()
         for key, value in args.items():
             if conv_keys:
@@ -332,11 +369,11 @@
         return self._qmp.cmd(cmd, args=qmp_args)
 
     def command(self, cmd, conv_keys=True, **args):
-        '''
+        """
         Invoke a QMP command.
         On success return the response dict.
         On failure raise an exception.
-        '''
+        """
         reply = self.qmp(cmd, conv_keys, **args)
         if reply is None:
             raise qmp.qmp.QMPError("Monitor is closed")
@@ -345,13 +382,17 @@
         return reply["return"]
 
     def get_qmp_event(self, wait=False):
-        '''Poll for one queued QMP events and return it'''
+        """
+        Poll for one queued QMP events and return it
+        """
         if len(self._events) > 0:
             return self._events.pop(0)
         return self._qmp.pull_event(wait=wait)
 
     def get_qmp_events(self, wait=False):
-        '''Poll for queued QMP events and return a list of dicts'''
+        """
+        Poll for queued QMP events and return a list of dicts
+        """
         events = self._qmp.get_events(wait=wait)
         events.extend(self._events)
         del self._events[:]
@@ -359,7 +400,7 @@
         return events
 
     def event_wait(self, name, timeout=60.0, match=None):
-        '''
+        """
         Wait for specified timeout on named event in QMP; optionally filter
         results by match.
 
@@ -367,7 +408,7 @@
         branch processing on match's value None
            {"foo": {"bar": 1}} matches {"foo": None}
            {"foo": {"bar": 1}} does not matches {"foo": {"baz": None}}
-        '''
+        """
         def event_match(event, match=None):
             if match is None:
                 return True
@@ -400,29 +441,29 @@
         return None
 
     def get_log(self):
-        '''
+        """
         After self.shutdown or failed qemu execution, this returns the output
         of the qemu process.
-        '''
+        """
         return self._iolog
 
     def add_args(self, *args):
-        '''
+        """
         Adds to the list of extra arguments to be given to the QEMU binary
-        '''
+        """
         self._args.extend(args)
 
     def set_machine(self, machine_type):
-        '''
+        """
         Sets the machine type
 
         If set, the machine type will be added to the base arguments
         of the resulting QEMU command line.
-        '''
+        """
         self._machine = machine_type
 
     def set_console(self, device_type=None):
-        '''
+        """
         Sets the device type for a console device
 
         If set, the console device and a backing character device will
@@ -440,7 +481,7 @@
         @param device_type: the device type, such as "isa-serial"
         @raises: QEMUMachineAddDeviceError if the device type is not given
                  and can not be determined.
-        '''
+        """
         if device_type is None:
             if self._machine is None:
                 raise QEMUMachineAddDeviceError("Can not add a console device:"
diff --git a/scripts/qtest.py b/scripts/qtest.py
index df0daf2..adf1fe3 100644
--- a/scripts/qtest.py
+++ b/scripts/qtest.py
@@ -64,7 +64,7 @@
 
         @param qtest_cmd: qtest command text to be sent
         """
-        self._sock.sendall(qtest_cmd + "\n")
+        self._sock.sendall((qtest_cmd + "\n").encode('utf-8'))
 
     def close(self):
         self._sock.close()
diff --git a/tests/Makefile.include b/tests/Makefile.include
index f77a495..d2e577e 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -11,7 +11,9 @@
 	@echo " $(MAKE) check-qapi-schema    Run QAPI schema tests"
 	@echo " $(MAKE) check-block          Run block tests"
 	@echo " $(MAKE) check-tcg            Run TCG tests"
+	@echo " $(MAKE) check-acceptance     Run all acceptance (functional) tests"
 	@echo " $(MAKE) check-report.html    Generates an HTML test report"
+	@echo " $(MAKE) check-venv           Creates a Python venv for tests"
 	@echo " $(MAKE) check-clean          Clean the tests"
 	@echo
 	@echo "Please note that HTML reports do not regenerate if the unit tests"
@@ -899,6 +901,46 @@
           ./check.sh "$(PYTHON)" "$(SRC_PATH)/scripts/decodetree.py", \
           TEST, decodetree.py)
 
+# Python venv for running tests
+
+.PHONY: check-venv check-acceptance
+
+TESTS_VENV_DIR=$(BUILD_DIR)/tests/venv
+TESTS_VENV_REQ=$(SRC_PATH)/tests/requirements.txt
+TESTS_RESULTS_DIR=$(BUILD_DIR)/tests/results
+# Controls the output generated by Avocado when running tests.
+# Any number of command separated loggers are accepted.  For more
+# information please refer to "avocado --help".
+AVOCADO_SHOW=none
+
+$(shell $(PYTHON) -c 'import sys; assert sys.version_info >= (3,0)' >/dev/null 2>&1)
+ifeq ($(.SHELLSTATUS),0)
+$(TESTS_VENV_DIR): $(TESTS_VENV_REQ)
+	$(call quiet-command, \
+            $(PYTHON) -m venv --system-site-packages $@, \
+            VENV, $@)
+	$(call quiet-command, \
+            $(TESTS_VENV_DIR)/bin/python -m pip -q install -r $(TESTS_VENV_REQ), \
+            PIP, $(TESTS_VENV_REQ))
+	$(call quiet-command, touch $@)
+else
+$(TESTS_VENV_DIR):
+	$(error "venv directory for tests requires Python 3")
+endif
+
+$(TESTS_RESULTS_DIR):
+	$(call quiet-command, mkdir -p $@, \
+            MKDIR, $@)
+
+check-venv: $(TESTS_VENV_DIR)
+
+check-acceptance: check-venv $(TESTS_RESULTS_DIR)
+	$(call quiet-command, \
+            $(TESTS_VENV_DIR)/bin/python -m avocado \
+            --show=$(AVOCADO_SHOW) run --job-results-dir=$(TESTS_RESULTS_DIR) \
+            --failfast=on $(SRC_PATH)/tests/acceptance, \
+            "AVOCADO", "tests/acceptance")
+
 # Consolidated targets
 
 .PHONY: check-qapi-schema check-qtest check-unit check check-clean
@@ -912,6 +954,7 @@
 	rm -rf $(check-unit-y) tests/*.o $(QEMU_IOTESTS_HELPERS-y)
 	rm -rf $(sort $(foreach target,$(SYSEMU_TARGET_LIST), $(check-qtest-$(target)-y)) $(check-qtest-generic-y))
 	rm -f tests/test-qapi-gen-timestamp
+	rm -rf $(TESTS_VENV_DIR) $(TESTS_RESULTS_DIR)
 
 clean: check-clean
 
diff --git a/tests/qemu-iotests/030 b/tests/qemu-iotests/030
index 1dbc2dd..276e06b 100755
--- a/tests/qemu-iotests/030
+++ b/tests/qemu-iotests/030
@@ -521,7 +521,7 @@
 state = "2"
 event = "%s"
 new_state = "1"
-''' % (event, errno, self.STREAM_BUFFER_SIZE / 512, event, event))
+''' % (event, errno, self.STREAM_BUFFER_SIZE // 512, event, event))
         file.close()
 
 class TestEIO(TestErrors):
diff --git a/tests/qemu-iotests/040 b/tests/qemu-iotests/040
index 1cb1cee..b81133a 100755
--- a/tests/qemu-iotests/040
+++ b/tests/qemu-iotests/040
@@ -195,7 +195,7 @@
 
         self.assert_no_active_block_jobs()
         result = self.vm.qmp('block-commit', device='drive0', top=mid_img,
-                             base=backing_img, speed=(self.image_len / 4))
+                             base=backing_img, speed=(self.image_len // 4))
         self.assert_qmp(result, 'return', {})
         result = self.vm.qmp('device_del', id='scsi0')
         self.assert_qmp(result, 'return', {})
@@ -225,7 +225,7 @@
 
         self.assert_no_active_block_jobs()
         result = self.vm.qmp('block-commit', device='drive0', top=mid_img,
-                             base=backing_img, speed=(self.image_len / 4))
+                             base=backing_img, speed=(self.image_len // 4))
         self.assert_qmp(result, 'return', {})
 
         result = self.vm.qmp('query-block')
diff --git a/tests/qemu-iotests/041 b/tests/qemu-iotests/041
index 9336ab6..3615011 100755
--- a/tests/qemu-iotests/041
+++ b/tests/qemu-iotests/041
@@ -404,7 +404,7 @@
 state = "2"
 event = "%s"
 new_state = "1"
-''' % (event, errno, self.MIRROR_GRANULARITY / 512, event, event))
+''' % (event, errno, self.MIRROR_GRANULARITY // 512, event, event))
         file.close()
 
     def setUp(self):
@@ -569,7 +569,7 @@
 state = "2"
 event = "%s"
 new_state = "1"
-''' % (event, errno, self.MIRROR_GRANULARITY / 512, event, event))
+''' % (event, errno, self.MIRROR_GRANULARITY // 512, event, event))
         file.close()
 
     def setUp(self):
diff --git a/tests/qemu-iotests/044 b/tests/qemu-iotests/044
index 11ea0f4..9ec3dba 100755
--- a/tests/qemu-iotests/044
+++ b/tests/qemu-iotests/044
@@ -26,6 +26,10 @@
 from iotests import qemu_img, qemu_img_verbose, qemu_io
 import struct
 import subprocess
+import sys
+
+if sys.version_info.major == 2:
+    range = xrange
 
 test_img = os.path.join(iotests.test_dir, 'test.img')
 
@@ -52,23 +56,23 @@
             # Write a refcount table
             fd.seek(off_reftable)
 
-            for i in xrange(0, h.refcount_table_clusters):
-                sector = ''.join(struct.pack('>Q',
+            for i in range(0, h.refcount_table_clusters):
+                sector = b''.join(struct.pack('>Q',
                     off_refblock + i * 64 * 512 + j * 512)
-                    for j in xrange(0, 64))
+                    for j in range(0, 64))
                 fd.write(sector)
 
             # Write the refcount blocks
             assert(fd.tell() == off_refblock)
-            sector = ''.join(struct.pack('>H', 1) for j in xrange(0, 64 * 256))
-            for block in xrange(0, h.refcount_table_clusters):
+            sector = b''.join(struct.pack('>H', 1) for j in range(0, 64 * 256))
+            for block in range(0, h.refcount_table_clusters):
                 fd.write(sector)
 
             # Write the L1 table
             assert(fd.tell() == off_l1)
             assert(off_l2 + 512 * h.l1_size == off_data)
-            table = ''.join(struct.pack('>Q', (1 << 63) | off_l2 + 512 * j)
-                for j in xrange(0, h.l1_size))
+            table = b''.join(struct.pack('>Q', (1 << 63) | off_l2 + 512 * j)
+                for j in range(0, h.l1_size))
             fd.write(table)
 
             # Write the L2 tables
@@ -79,14 +83,14 @@
             off = off_data
             while remaining > 1024 * 512:
                 pytable = list((1 << 63) | off + 512 * j
-                    for j in xrange(0, 1024))
+                    for j in range(0, 1024))
                 table = struct.pack('>1024Q', *pytable)
                 fd.write(table)
                 remaining = remaining - 1024 * 512
                 off = off + 1024 * 512
 
-            table = ''.join(struct.pack('>Q', (1 << 63) | off + 512 * j)
-                for j in xrange(0, remaining / 512))
+            table = b''.join(struct.pack('>Q', (1 << 63) | off + 512 * j)
+                for j in range(0, remaining // 512))
             fd.write(table)
 
 
diff --git a/tests/qemu-iotests/045 b/tests/qemu-iotests/045
index 6be8fc4..55a5d31 100755
--- a/tests/qemu-iotests/045
+++ b/tests/qemu-iotests/045
@@ -140,7 +140,7 @@
         os.remove(image0)
 
     def _send_fd_by_SCM(self):
-        ret = self.vm.send_fd_scm(image0)
+        ret = self.vm.send_fd_scm(file_path=image0)
         self.assertEqual(ret, 0, 'Failed to send fd with UNIX SCM')
 
     def test_add_fd(self):
diff --git a/tests/qemu-iotests/056 b/tests/qemu-iotests/056
index 2232921..3df3239 100755
--- a/tests/qemu-iotests/056
+++ b/tests/qemu-iotests/056
@@ -32,7 +32,7 @@
 def img_create(img, fmt=iotests.imgfmt, size='64M', **kwargs):
     fullname = os.path.join(iotests.test_dir, '%s.%s' % (img, fmt))
     optargs = []
-    for k,v in kwargs.iteritems():
+    for k,v in kwargs.items():
         optargs = optargs + ['-o', '%s=%s' % (k,v)]
     args = ['create', '-f', fmt] + optargs + [fullname, size]
     iotests.qemu_img(*args)
diff --git a/tests/qemu-iotests/065 b/tests/qemu-iotests/065
index 72aa970..8bac383 100755
--- a/tests/qemu-iotests/065
+++ b/tests/qemu-iotests/065
@@ -59,7 +59,7 @@
                     :data.index('')]
         for field in data:
             self.assertTrue(re.match('^ {4}[^ ]', field) is not None)
-        data = map(lambda line: line.strip(), data)
+        data = [line.strip() for line in data]
         self.assertEqual(data, self.human_compare)
 
 class TestQMP(TestImageInfoSpecific):
@@ -80,7 +80,7 @@
 
     def test_qmp(self):
         result = self.vm.qmp('query-block')['return']
-        drive = filter(lambda drive: drive['device'] == 'drive0', result)[0]
+        drive = next(drive for drive in result if drive['device'] == 'drive0')
         data = drive['inserted']['image']['format-specific']
         self.assertEqual(data['type'], iotests.imgfmt)
         self.assertEqual(data['data'], self.compare)
diff --git a/tests/qemu-iotests/083.out b/tests/qemu-iotests/083.out
index be6079d..f9af8bb 100644
--- a/tests/qemu-iotests/083.out
+++ b/tests/qemu-iotests/083.out
@@ -41,6 +41,7 @@
 
 === Check disconnect after neg2 ===
 
+Unable to read from socket: Connection reset by peer
 Connection closed
 read failed: Input/output error
 
@@ -54,6 +55,7 @@
 
 === Check disconnect before request ===
 
+Unable to read from socket: Connection reset by peer
 Connection closed
 read failed: Input/output error
 
@@ -116,6 +118,7 @@
 
 === Check disconnect after neg-classic ===
 
+Unable to read from socket: Connection reset by peer
 Connection closed
 read failed: Input/output error
 
@@ -161,6 +164,8 @@
 
 === Check disconnect after neg2 ===
 
+Unable to read from socket: Connection reset by peer
+Connection closed
 read failed: Input/output error
 
 === Check disconnect 8 neg2 ===
@@ -173,6 +178,8 @@
 
 === Check disconnect before request ===
 
+Unable to read from socket: Connection reset by peer
+Connection closed
 read failed: Input/output error
 
 === Check disconnect after request ===
@@ -234,6 +241,8 @@
 
 === Check disconnect after neg-classic ===
 
+Unable to read from socket: Connection reset by peer
+Connection closed
 read failed: Input/output error
 
 *** done
diff --git a/tests/qemu-iotests/093 b/tests/qemu-iotests/093
index 9d1971a..d88fbc1 100755
--- a/tests/qemu-iotests/093
+++ b/tests/qemu-iotests/093
@@ -69,18 +69,18 @@
         # in. The throttled requests won't be executed until we
         # advance the virtual clock.
         rq_size = 512
-        rd_nr = max(params['bps'] / rq_size / 2,
-                    params['bps_rd'] / rq_size,
-                    params['iops'] / 2,
+        rd_nr = max(params['bps'] // rq_size // 2,
+                    params['bps_rd'] // rq_size,
+                    params['iops'] // 2,
                     params['iops_rd'])
         rd_nr *= seconds * 2
-        rd_nr /= ndrives
-        wr_nr = max(params['bps'] / rq_size / 2,
-                    params['bps_wr'] / rq_size,
-                    params['iops'] / 2,
+        rd_nr //= ndrives
+        wr_nr = max(params['bps'] // rq_size // 2,
+                    params['bps_wr'] // rq_size,
+                    params['iops'] // 2,
                     params['iops_wr'])
         wr_nr *= seconds * 2
-        wr_nr /= ndrives
+        wr_nr //= ndrives
 
         # Send I/O requests to all drives
         for i in range(rd_nr):
@@ -196,7 +196,7 @@
             self.configure_throttle(ndrives, settings)
 
             # Wait for the bucket to empty so we can do bursts
-            wait_ns = nsec_per_sec * burst_length * burst_rate / rate
+            wait_ns = nsec_per_sec * burst_length * burst_rate // rate
             self.vm.qtest("clock_step %d" % wait_ns)
 
             # Test I/O at the max burst rate
diff --git a/tests/qemu-iotests/124 b/tests/qemu-iotests/124
index 3ea4ac5..9f189e3 100755
--- a/tests/qemu-iotests/124
+++ b/tests/qemu-iotests/124
@@ -39,7 +39,7 @@
 def transaction_action(action, **kwargs):
     return {
         'type': action,
-        'data': dict((k.replace('_', '-'), v) for k, v in kwargs.iteritems())
+        'data': dict((k.replace('_', '-'), v) for k, v in kwargs.items())
     }
 
 
@@ -134,7 +134,7 @@
     def img_create(self, img, fmt=iotests.imgfmt, size='64M',
                    parent=None, parentFormat=None, **kwargs):
         optargs = []
-        for k,v in kwargs.iteritems():
+        for k,v in kwargs.items():
             optargs = optargs + ['-o', '%s=%s' % (k,v)]
         args = ['create', '-f', fmt] + optargs + [img, size]
         if parent:
diff --git a/tests/qemu-iotests/136 b/tests/qemu-iotests/136
index a154d8e..af7ffa4 100755
--- a/tests/qemu-iotests/136
+++ b/tests/qemu-iotests/136
@@ -24,7 +24,7 @@
 
 interval_length = 10
 nsec_per_sec = 1000000000
-op_latency = nsec_per_sec / 1000 # See qtest_latency_ns in accounting.c
+op_latency = nsec_per_sec // 1000 # See qtest_latency_ns in accounting.c
 bad_sector = 8192
 bad_offset = bad_sector * 512
 blkdebug_file = os.path.join(iotests.test_dir, 'blkdebug.conf')
diff --git a/tests/qemu-iotests/139 b/tests/qemu-iotests/139
index cc7fe33..62402c1 100755
--- a/tests/qemu-iotests/139
+++ b/tests/qemu-iotests/139
@@ -51,7 +51,7 @@
     # Check whether a BlockDriverState exists
     def checkBlockDriverState(self, node, must_exist = True):
         result = self.vm.qmp('query-named-block-nodes')
-        nodes = filter(lambda x: x['node-name'] == node, result['return'])
+        nodes = [x for x in result['return'] if x['node-name'] == node]
         self.assertLessEqual(len(nodes), 1)
         self.assertEqual(must_exist, len(nodes) == 1)
 
diff --git a/tests/qemu-iotests/147 b/tests/qemu-iotests/147
index d2081df..05b374b 100755
--- a/tests/qemu-iotests/147
+++ b/tests/qemu-iotests/147
@@ -229,7 +229,7 @@
         sockfd = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
         sockfd.connect(unix_socket)
 
-        result = self.vm.send_fd_scm(str(sockfd.fileno()))
+        result = self.vm.send_fd_scm(fd=sockfd.fileno())
         self.assertEqual(result, 0, 'Failed to send socket FD')
 
         result = self.vm.qmp('getfd', fdname='nbd-fifo')
diff --git a/tests/qemu-iotests/149 b/tests/qemu-iotests/149
index 9e0cad7..4f363f2 100755
--- a/tests/qemu-iotests/149
+++ b/tests/qemu-iotests/149
@@ -79,7 +79,7 @@
 
     def first_password_base64(self):
         (pw, slot) = self.first_password()
-        return base64.b64encode(pw)
+        return base64.b64encode(pw.encode('ascii')).decode('ascii')
 
     def active_slots(self):
         slots = []
@@ -98,7 +98,8 @@
     proc = subprocess.Popen(args,
                             stdin=subprocess.PIPE,
                             stdout=subprocess.PIPE,
-                            stderr=subprocess.STDOUT)
+                            stderr=subprocess.STDOUT,
+                            universal_newlines=True)
 
     msg = proc.communicate()[0]
 
@@ -116,7 +117,8 @@
     proc = subprocess.Popen(fullargs,
                             stdin=subprocess.PIPE,
                             stdout=subprocess.PIPE,
-                            stderr=subprocess.STDOUT)
+                            stderr=subprocess.STDOUT,
+                            universal_newlines=True)
 
     msg = proc.communicate(password)[0]
 
@@ -312,13 +314,13 @@
     image_size = 4 * oneTB
     if qemu_img:
         iotests.log("# Create image")
-        qemu_img_create(config, image_size / oneMB)
+        qemu_img_create(config, image_size // oneMB)
     else:
         iotests.log("# Create image")
-        create_image(config, image_size / oneMB)
+        create_image(config, image_size // oneMB)
 
     lowOffsetMB = 100
-    highOffsetMB = 3 * oneTB / oneMB
+    highOffsetMB = 3 * oneTB // oneMB
 
     try:
         if not qemu_img:
diff --git a/tests/qemu-iotests/151 b/tests/qemu-iotests/151
index fe53b9f..1bb74d6 100755
--- a/tests/qemu-iotests/151
+++ b/tests/qemu-iotests/151
@@ -67,9 +67,9 @@
                             'write -P 1 0 %i' % self.image_len);
 
         # Start some background requests
-        for offset in range(1 * self.image_len / 8, 3 * self.image_len / 8, 1024 * 1024):
+        for offset in range(1 * self.image_len // 8, 3 * self.image_len // 8, 1024 * 1024):
             self.vm.hmp_qemu_io('source', 'aio_write -P 2 %i 1M' % offset)
-        for offset in range(2 * self.image_len / 8, 3 * self.image_len / 8, 1024 * 1024):
+        for offset in range(2 * self.image_len // 8, 3 * self.image_len // 8, 1024 * 1024):
             self.vm.hmp_qemu_io('source', 'aio_write -z %i 1M' % offset)
 
         # Start the block job
@@ -83,9 +83,9 @@
         self.assert_qmp(result, 'return', {})
 
         # Start some more requests
-        for offset in range(3 * self.image_len / 8, 5 * self.image_len / 8, 1024 * 1024):
+        for offset in range(3 * self.image_len // 8, 5 * self.image_len // 8, 1024 * 1024):
             self.vm.hmp_qemu_io('source', 'aio_write -P 3 %i 1M' % offset)
-        for offset in range(4 * self.image_len / 8, 5 * self.image_len / 8, 1024 * 1024):
+        for offset in range(4 * self.image_len // 8, 5 * self.image_len // 8, 1024 * 1024):
             self.vm.hmp_qemu_io('source', 'aio_write -z %i 1M' % offset)
 
         # Wait for the READY event
@@ -95,9 +95,9 @@
         # the source) should be settled using the active mechanism.
         # The mirror code itself asserts that the source BDS's dirty
         # bitmap will stay clean between READY and COMPLETED.
-        for offset in range(5 * self.image_len / 8, 7 * self.image_len / 8, 1024 * 1024):
+        for offset in range(5 * self.image_len // 8, 7 * self.image_len // 8, 1024 * 1024):
             self.vm.hmp_qemu_io('source', 'aio_write -P 3 %i 1M' % offset)
-        for offset in range(6 * self.image_len / 8, 7 * self.image_len / 8, 1024 * 1024):
+        for offset in range(6 * self.image_len // 8, 7 * self.image_len // 8, 1024 * 1024):
             self.vm.hmp_qemu_io('source', 'aio_write -z %i 1M' % offset)
 
         if sync_source_and_target:
diff --git a/tests/qemu-iotests/163 b/tests/qemu-iotests/163
index 4038423..158ba5d 100755
--- a/tests/qemu-iotests/163
+++ b/tests/qemu-iotests/163
@@ -18,9 +18,12 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-import os, random, iotests, struct, qcow2
+import os, random, iotests, struct, qcow2, sys
 from iotests import qemu_img, qemu_io, image_size
 
+if sys.version_info.major == 2:
+    range = xrange
+
 test_img = os.path.join(iotests.test_dir, 'test.img')
 check_img = os.path.join(iotests.test_dir, 'check.img')
 
@@ -38,10 +41,10 @@
         entry_bits = 3
         entry_size = 1 << entry_bits
         l1_mask = 0x00fffffffffffe00
-        div_roundup = lambda n, d: (n + d - 1) / d
+        div_roundup = lambda n, d: (n + d - 1) // d
 
         def split_by_n(data, n):
-            for x in xrange(0, len(data), n):
+            for x in range(0, len(data), n):
                 yield struct.unpack('>Q', data[x:x + n])[0] & l1_mask
 
         def check_l1_table(h, l1_data):
@@ -135,8 +138,8 @@
         self.image_verify()
 
     def test_random_write(self):
-        offs_list = range(0, size_to_int(self.image_len),
-                          size_to_int(self.chunk_size))
+        offs_list = list(range(0, size_to_int(self.image_len),
+                               size_to_int(self.chunk_size)))
         random.shuffle(offs_list)
         for offs in offs_list:
             qemu_io('-c', 'write -P 0xff %d %s' % (offs, self.chunk_size),
diff --git a/tests/qemu-iotests/169 b/tests/qemu-iotests/169
index 69850c4..527aebd 100755
--- a/tests/qemu-iotests/169
+++ b/tests/qemu-iotests/169
@@ -23,7 +23,6 @@
 import time
 import itertools
 import operator
-import new
 import re
 from iotests import qemu_img
 
@@ -204,7 +203,7 @@
 
 def inject_test_case(klass, name, method, *args, **kwargs):
     mc = operator.methodcaller(method, *args, **kwargs)
-    setattr(klass, 'test_' + method + name, new.instancemethod(mc, None, klass))
+    setattr(klass, 'test_' + method + name, lambda self: mc(self))
 
 for cmb in list(itertools.product((True, False), repeat=4)):
     name = ('_' if cmb[0] else '_not_') + 'persistent_'
diff --git a/tests/qemu-iotests/194.out b/tests/qemu-iotests/194.out
index 50ac50d..7185785 100644
--- a/tests/qemu-iotests/194.out
+++ b/tests/qemu-iotests/194.out
@@ -1,18 +1,18 @@
 Launching VMs...
 Launching NBD server on destination...
-{u'return': {}}
-{u'return': {}}
+{"return": {}}
+{"return": {}}
 Starting `drive-mirror` on source...
-{u'return': {}}
+{"return": {}}
 Waiting for `drive-mirror` to complete...
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror-job0', u'type': u'mirror', u'speed': 0, u'len': 1073741824, u'offset': 1073741824}, u'event': u'BLOCK_JOB_READY'}
+{"data": {"device": "mirror-job0", "len": 1073741824, "offset": 1073741824, "speed": 0, "type": "mirror"}, "event": "BLOCK_JOB_READY", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 Starting migration...
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'setup'}, u'event': u'MIGRATION'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'active'}, u'event': u'MIGRATION'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'completed'}, u'event': u'MIGRATION'}
+{"return": {}}
+{"data": {"status": "setup"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"status": "active"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"status": "completed"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 Gracefully ending the `drive-mirror` job on source...
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror-job0', u'type': u'mirror', u'speed': 0, u'len': 1073741824, u'offset': 1073741824}, u'event': u'BLOCK_JOB_COMPLETED'}
+{"return": {}}
+{"data": {"device": "mirror-job0", "len": 1073741824, "offset": 1073741824, "speed": 0, "type": "mirror"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 Stopping the NBD server on destination...
-{u'return': {}}
+{"return": {}}
diff --git a/tests/qemu-iotests/202.out b/tests/qemu-iotests/202.out
index d5ea374..9a8619e 100644
--- a/tests/qemu-iotests/202.out
+++ b/tests/qemu-iotests/202.out
@@ -1,11 +1,11 @@
 Launching VM...
 Adding IOThread...
-{u'return': {}}
+{"return": {}}
 Adding blockdevs...
-{u'return': {}}
-{u'return': {}}
+{"return": {}}
+{"return": {}}
 Setting iothread...
-{u'return': {}}
-{u'return': {}}
+{"return": {}}
+{"return": {}}
 Creating external snapshots...
-{u'return': {}}
+{"return": {}}
diff --git a/tests/qemu-iotests/203.out b/tests/qemu-iotests/203.out
index 1a11f09..9d4abba 100644
--- a/tests/qemu-iotests/203.out
+++ b/tests/qemu-iotests/203.out
@@ -1,11 +1,11 @@
 Launching VM...
 Setting IOThreads...
-{u'return': {}}
-{u'return': {}}
+{"return": {}}
+{"return": {}}
 Enabling migration QMP events...
-{u'return': {}}
+{"return": {}}
 Starting migration...
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'setup'}, u'event': u'MIGRATION'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'active'}, u'event': u'MIGRATION'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'completed'}, u'event': u'MIGRATION'}
+{"return": {}}
+{"data": {"status": "setup"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"status": "active"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"status": "completed"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
diff --git a/tests/qemu-iotests/206.out b/tests/qemu-iotests/206.out
index 789eebe..91f4db5 100644
--- a/tests/qemu-iotests/206.out
+++ b/tests/qemu-iotests/206.out
@@ -1,16 +1,16 @@
 === Successful image creation (defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-add', 'arguments': {'node_name': 'imgfile', 'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}}
-{u'return': {}}
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'qcow2', 'file': 'imgfile', 'size': 134217728}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-add", "arguments": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2", "node_name": "imgfile"}}
+{"return": {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "imgfile", "size": 134217728}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -24,15 +24,15 @@
 
 === Successful image creation (inline blockdev-add, explicit defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'nocow': False, 'preallocation': 'off', 'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2", "nocow": false, "preallocation": "off", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 65536, 'refcount-bits': 16, 'version': 'v3', 'preallocation': 'off', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}, 'lazy-refcounts': False, 'driver': 'qcow2', 'size': 67108864}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 65536, "driver": "qcow2", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2"}, "lazy-refcounts": false, "preallocation": "off", "refcount-bits": 16, "size": 67108864, "version": "v3"}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -46,15 +46,15 @@
 
 === Successful image creation (v3 non-default options) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'nocow': True, 'preallocation': 'falloc', 'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2", "nocow": true, "preallocation": "falloc", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 2097152, 'refcount-bits': 1, 'version': 'v3', 'preallocation': 'metadata', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}, 'lazy-refcounts': True, 'driver': 'qcow2', 'size': 33554432}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 2097152, "driver": "qcow2", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2"}, "lazy-refcounts": true, "preallocation": "metadata", "refcount-bits": 1, "size": 33554432, "version": "v3"}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -68,15 +68,15 @@
 
 === Successful image creation (v2 non-default options) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 512, 'backing-fmt': 'qcow2', 'driver': 'qcow2', 'version': 'v2', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}, 'backing-file': 'TEST_DIR/PID-t.qcow2.base', 'size': 33554432}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"backing-file": "TEST_DIR/PID-t.qcow2.base", "backing-fmt": "qcow2", "cluster-size": 512, "driver": "qcow2", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2"}, "size": 33554432, "version": "v2"}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -90,10 +90,10 @@
 
 === Successful image creation (encrypted) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'encrypt': {'key-secret': 'keysec0', 'iter-time': 10, 'cipher-mode': 'ctr', 'ivgen-hash-alg': 'md5', 'cipher-alg': 'twofish-128', 'format': 'luks', 'ivgen-alg': 'plain64', 'hash-alg': 'sha1'}, 'driver': 'qcow2', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.qcow2'}, 'size': 33554432}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "encrypt": {"cipher-alg": "twofish-128", "cipher-mode": "ctr", "format": "luks", "hash-alg": "sha1", "iter-time": 10, "ivgen-alg": "plain64", "ivgen-hash-alg": "md5", "key-secret": "keysec0"}, "file": {"driver": "file", "filename": "TEST_DIR/PID-t.qcow2"}, "size": 33554432}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -144,113 +144,113 @@
 
 === Invalid BlockdevRef ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'qcow2', 'file': "this doesn't exist", 'size': 33554432}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "this doesn't exist", "size": 33554432}}}
+{"return": {}}
 Job failed: Cannot find device=this doesn't exist nor node_name=this doesn't exist
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Invalid sizes ===
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'qcow2', 'file': 'node0', 'size': 1234}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "size": 1234}}}
+{"return": {}}
 Job failed: Image size must be a multiple of 512 bytes
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'qcow2', 'file': 'node0', 'size': 18446744073709551104L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "size": 18446744073709551104}}}
+{"return": {}}
 Job failed: Could not resize image: Image size cannot be negative
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'qcow2', 'file': 'node0', 'size': 9223372036854775808L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "size": 9223372036854775808}}}
+{"return": {}}
 Job failed: Could not resize image: Image size cannot be negative
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'qcow2', 'file': 'node0', 'size': 9223372036854775296}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "size": 9223372036854775296}}}
+{"return": {}}
 Job failed: Could not resize image: Failed to grow the L1 table: File too large
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Invalid version ===
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'version': 'v1', 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'error': {u'class': u'GenericError', u'desc': u"Invalid parameter 'v1'"}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "size": 67108864, "version": "v1"}}}
+{"error": {"class": "GenericError", "desc": "Invalid parameter 'v1'"}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'lazy-refcounts': True, 'version': 'v2', 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "lazy-refcounts": true, "size": 67108864, "version": "v2"}}}
+{"return": {}}
 Job failed: Lazy refcounts only supported with compatibility level 1.1 and above (use version=v3 or greater)
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'refcount-bits': 8, 'version': 'v2', 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "refcount-bits": 8, "size": 67108864, "version": "v2"}}}
+{"return": {}}
 Job failed: Different refcount widths than 16 bits require compatibility level 1.1 or above (use version=v3 or greater)
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Invalid backing file options ===
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'preallocation': 'full', 'driver': 'qcow2', 'backing-file': '/dev/null', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"backing-file": "/dev/null", "driver": "qcow2", "file": "node0", "preallocation": "full", "size": 67108864}}}
+{"return": {}}
 Job failed: Backing file and preallocation cannot be used at the same time
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'backing-fmt': 'qcow2', 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"backing-fmt": "qcow2", "driver": "qcow2", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Backing format cannot be used without backing file
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Invalid cluster size ===
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 1234, 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 1234, "driver": "qcow2", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size must be a power of two between 512 and 2048k
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 128, 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 128, "driver": "qcow2", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size must be a power of two between 512 and 2048k
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 4194304, 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 4194304, "driver": "qcow2", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size must be a power of two between 512 and 2048k
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 0, 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 0, "driver": "qcow2", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size must be a power of two between 512 and 2048k
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 512, 'driver': 'qcow2', 'file': 'node0', 'size': 281474976710656}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 512, "driver": "qcow2", "file": "node0", "size": 281474976710656}}}
+{"return": {}}
 Job failed: Could not resize image: Failed to grow the L1 table: File too large
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Invalid refcount width ===
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'refcount-bits': 128, 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "refcount-bits": 128, "size": 67108864}}}
+{"return": {}}
 Job failed: Refcount width must be a power of two and may not exceed 64 bits
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'refcount-bits': 0, 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "refcount-bits": 0, "size": 67108864}}}
+{"return": {}}
 Job failed: Refcount width must be a power of two and may not exceed 64 bits
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'refcount-bits': 7, 'driver': 'qcow2', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "qcow2", "file": "node0", "refcount-bits": 7, "size": 67108864}}}
+{"return": {}}
 Job failed: Refcount width must be a power of two and may not exceed 64 bits
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
diff --git a/tests/qemu-iotests/207 b/tests/qemu-iotests/207
index 444ae23..c617ee7 100755
--- a/tests/qemu-iotests/207
+++ b/tests/qemu-iotests/207
@@ -28,7 +28,7 @@
 iotests.verify_protocol(supported=['ssh'])
 
 def filter_hash(msg):
-    return re.sub("'hash': '[0-9a-f]+'", "'hash': HASH", msg)
+    return re.sub('"hash": "[0-9a-f]+"', '"hash": HASH', msg)
 
 def blockdev_create(vm, options):
     result = vm.qmp_log('blockdev-create', job_id='job0', options=options,
@@ -109,7 +109,7 @@
     md5_key = subprocess.check_output(
         'ssh-keyscan -t rsa 127.0.0.1 2>/dev/null | grep -v "\\^#" | ' +
         'cut -d" " -f3 | base64 -d | md5sum -b | cut -d" " -f1',
-        shell=True).rstrip()
+        shell=True).rstrip().decode('ascii')
 
     vm.launch()
     blockdev_create(vm, { 'driver': 'ssh',
@@ -147,7 +147,7 @@
     sha1_key = subprocess.check_output(
         'ssh-keyscan -t rsa 127.0.0.1 2>/dev/null | grep -v "\\^#" | ' +
         'cut -d" " -f3 | base64 -d | sha1sum -b | cut -d" " -f1',
-        shell=True).rstrip()
+        shell=True).rstrip().decode('ascii')
 
     vm.launch()
     blockdev_create(vm, { 'driver': 'ssh',
diff --git a/tests/qemu-iotests/207.out b/tests/qemu-iotests/207.out
index 078b7e6..45ac7c2 100644
--- a/tests/qemu-iotests/207.out
+++ b/tests/qemu-iotests/207.out
@@ -1,9 +1,9 @@
 === Successful image creation (defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': 'TEST_DIR/PID-t.img', 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 4194304}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 4194304}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: json:{"driver": "IMGFMT", "file": {"server.host": "127.0.0.1", "server.port": "22", "driver": "ssh", "path": "TEST_IMG"}}
 file format: IMGFMT
@@ -16,49 +16,49 @@
 
 === Test host-key-check options ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': 'TEST_DIR/PID-t.img', 'host-key-check': {'mode': 'none'}, 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 8388608}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"mode": "none"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 8388608}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: json:{"driver": "IMGFMT", "file": {"server.host": "127.0.0.1", "server.port": "22", "driver": "ssh", "path": "TEST_IMG"}}
 file format: IMGFMT
 virtual size: 8.0M (8388608 bytes)
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': 'TEST_DIR/PID-t.img', 'host-key-check': {'mode': 'known_hosts'}, 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 4194304}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"mode": "known_hosts"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 4194304}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: json:{"driver": "IMGFMT", "file": {"server.host": "127.0.0.1", "server.port": "22", "driver": "ssh", "path": "TEST_IMG"}}
 file format: IMGFMT
 virtual size: 4.0M (4194304 bytes)
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': 'TEST_DIR/PID-t.img', 'host-key-check': {'hash': 'wrong', 'type': 'md5', 'mode': 'hash'}, 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 2097152}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"hash": "wrong", "mode": "hash", "type": "md5"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 2097152}}}
+{"return": {}}
 Job failed: remote host key does not match host_key_check 'wrong'
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': 'TEST_DIR/PID-t.img', 'host-key-check': {'hash': HASH, 'type': 'md5', 'mode': 'hash'}, 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 8388608}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"hash": HASH, "mode": "hash", "type": "md5"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 8388608}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: json:{"driver": "IMGFMT", "file": {"server.host": "127.0.0.1", "server.port": "22", "driver": "ssh", "path": "TEST_IMG"}}
 file format: IMGFMT
 virtual size: 8.0M (8388608 bytes)
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': 'TEST_DIR/PID-t.img', 'host-key-check': {'hash': 'wrong', 'type': 'sha1', 'mode': 'hash'}, 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 2097152}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"hash": "wrong", "mode": "hash", "type": "sha1"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 2097152}}}
+{"return": {}}
 Job failed: remote host key does not match host_key_check 'wrong'
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': 'TEST_DIR/PID-t.img', 'host-key-check': {'hash': HASH, 'type': 'sha1', 'mode': 'hash'}, 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 4194304}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"hash": HASH, "mode": "hash", "type": "sha1"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 4194304}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: json:{"driver": "IMGFMT", "file": {"server.host": "127.0.0.1", "server.port": "22", "driver": "ssh", "path": "TEST_IMG"}}
 file format: IMGFMT
@@ -66,15 +66,15 @@
 
 === Invalid path and user ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': '/this/is/not/an/existing/path', 'host-key-check': {'mode': 'none'}, 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 4194304}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"mode": "none"}, "path": "/this/is/not/an/existing/path", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 4194304}}}
+{"return": {}}
 Job failed: failed to open remote file '/this/is/not/an/existing/path': Failed opening remote file (libssh2 error code: -31)
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'ssh', 'location': {'path': 'TEST_DIR/PID-t.img', 'host-key-check': {'mode': 'none'}, 'user': 'invalid user', 'server': {'host': '127.0.0.1', 'port': '22'}}, 'size': 4194304}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"mode": "none"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}, "user": "invalid user"}, "size": 4194304}}}
+{"return": {}}
 Job failed: failed to authenticate using publickey authentication and the identities held by your ssh-agent
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
diff --git a/tests/qemu-iotests/208.out b/tests/qemu-iotests/208.out
index 3687e9d..9ff2582 100644
--- a/tests/qemu-iotests/208.out
+++ b/tests/qemu-iotests/208.out
@@ -1,9 +1,9 @@
 Launching VM...
 Starting NBD server...
-{u'return': {}}
+{"return": {}}
 Adding NBD export...
-{u'return': {}}
+{"return": {}}
 Creating external snapshot...
-{u'return': {}}
+{"return": {}}
 Stopping NBD server...
-{u'return': {}}
+{"return": {}}
diff --git a/tests/qemu-iotests/210.out b/tests/qemu-iotests/210.out
index 078ba54..923cb05 100644
--- a/tests/qemu-iotests/210.out
+++ b/tests/qemu-iotests/210.out
@@ -1,16 +1,16 @@
 === Successful image creation (defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.luks'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.luks", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-add', 'arguments': {'node_name': 'imgfile', 'driver': 'file', 'filename': 'TEST_DIR/PID-t.luks'}}
-{u'return': {}}
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'key-secret': 'keysec0', 'iter-time': 10, 'driver': 'luks', 'file': 'imgfile', 'size': 134217728}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-add", "arguments": {"driver": "file", "filename": "TEST_DIR/PID-t.luks", "node_name": "imgfile"}}
+{"return": {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "luks", "file": "imgfile", "iter-time": 10, "key-secret": "keysec0", "size": 134217728}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: json:{"driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_IMG"}, "key-secret": "keysec0"}
 file format: IMGFMT
@@ -54,15 +54,15 @@
 
 === Successful image creation (with non-default options) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.luks'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.luks", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'key-secret': 'keysec0', 'hash-alg': 'sha1', 'cipher-mode': 'ctr', 'cipher-alg': 'twofish-128', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.luks'}, 'iter-time': 10, 'ivgen-alg': 'plain64', 'ivgen-hash-alg': 'md5', 'driver': 'luks', 'size': 67108864}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cipher-alg": "twofish-128", "cipher-mode": "ctr", "driver": "luks", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.luks"}, "hash-alg": "sha1", "iter-time": 10, "ivgen-alg": "plain64", "ivgen-hash-alg": "md5", "key-secret": "keysec0", "size": 67108864}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: json:{"driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_IMG"}, "key-secret": "keysec0"}
 file format: IMGFMT
@@ -106,18 +106,18 @@
 
 === Invalid BlockdevRef ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'luks', 'file': "this doesn't exist", 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "luks", "file": "this doesn't exist", "size": 67108864}}}
+{"return": {}}
 Job failed: Cannot find device=this doesn't exist nor node_name=this doesn't exist
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Zero size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'key-secret': 'keysec0', 'iter-time': 10, 'driver': 'luks', 'file': 'node0', 'size': 0}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "luks", "file": "node0", "iter-time": 10, "key-secret": "keysec0", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: json:{"driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_IMG"}, "key-secret": "keysec0"}
 file format: IMGFMT
@@ -161,34 +161,34 @@
 
 === Invalid sizes ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'key-secret': 'keysec0', 'driver': 'luks', 'file': 'node0', 'size': 18446744073709551104L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "luks", "file": "node0", "key-secret": "keysec0", "size": 18446744073709551104}}}
+{"return": {}}
 Job failed: The requested file size is too large
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'key-secret': 'keysec0', 'driver': 'luks', 'file': 'node0', 'size': 9223372036854775808L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "luks", "file": "node0", "key-secret": "keysec0", "size": 9223372036854775808}}}
+{"return": {}}
 Job failed: The requested file size is too large
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'key-secret': 'keysec0', 'driver': 'luks', 'file': 'node0', 'size': 9223372036854775296}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "luks", "file": "node0", "key-secret": "keysec0", "size": 9223372036854775296}}}
+{"return": {}}
 Job failed: The requested file size is too large
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Resize image with invalid sizes ===
 
-{'execute': 'block_resize', 'arguments': {'size': 9223372036854775296, 'node_name': 'node1'}}
-{u'error': {u'class': u'GenericError', u'desc': u'The requested file size is too large'}}
-{'execute': 'block_resize', 'arguments': {'size': 9223372036854775808L, 'node_name': 'node1'}}
-{u'error': {u'class': u'GenericError', u'desc': u"Invalid parameter type for 'size', expected: integer"}}
-{'execute': 'block_resize', 'arguments': {'size': 18446744073709551104L, 'node_name': 'node1'}}
-{u'error': {u'class': u'GenericError', u'desc': u"Invalid parameter type for 'size', expected: integer"}}
-{'execute': 'block_resize', 'arguments': {'size': -9223372036854775808, 'node_name': 'node1'}}
-{u'error': {u'class': u'GenericError', u'desc': u"Parameter 'size' expects a >0 size"}}
+{"execute": "block_resize", "arguments": {"node_name": "node1", "size": 9223372036854775296}}
+{"error": {"class": "GenericError", "desc": "The requested file size is too large"}}
+{"execute": "block_resize", "arguments": {"node_name": "node1", "size": 9223372036854775808}}
+{"error": {"class": "GenericError", "desc": "Invalid parameter type for 'size', expected: integer"}}
+{"execute": "block_resize", "arguments": {"node_name": "node1", "size": 18446744073709551104}}
+{"error": {"class": "GenericError", "desc": "Invalid parameter type for 'size', expected: integer"}}
+{"execute": "block_resize", "arguments": {"node_name": "node1", "size": -9223372036854775808}}
+{"error": {"class": "GenericError", "desc": "Parameter 'size' expects a >0 size"}}
 image: json:{"driver": "IMGFMT", "file": {"driver": "file", "filename": "TEST_IMG"}, "key-secret": "keysec0"}
 file format: IMGFMT
 virtual size: 0 (0 bytes)
diff --git a/tests/qemu-iotests/211.out b/tests/qemu-iotests/211.out
index 6feaea3..eebb0ea 100644
--- a/tests/qemu-iotests/211.out
+++ b/tests/qemu-iotests/211.out
@@ -1,16 +1,16 @@
 === Successful image creation (defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.vdi'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.vdi", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-add', 'arguments': {'node_name': 'imgfile', 'driver': 'file', 'filename': 'TEST_DIR/PID-t.vdi'}}
-{u'return': {}}
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vdi', 'file': 'imgfile', 'size': 134217728}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-add", "arguments": {"driver": "file", "filename": "TEST_DIR/PID-t.vdi", "node_name": "imgfile"}}
+{"return": {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": "imgfile", "size": 134217728}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -21,15 +21,15 @@
 
 === Successful image creation (explicit defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.vdi'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.vdi", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'preallocation': 'off', 'driver': 'vdi', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.vdi'}, 'size': 67108864}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.vdi"}, "preallocation": "off", "size": 67108864}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -40,15 +40,15 @@
 
 === Successful image creation (with non-default options) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.vdi'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.vdi", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'preallocation': 'metadata', 'driver': 'vdi', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.vdi'}, 'size': 33554432}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.vdi"}, "preallocation": "metadata", "size": 33554432}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -60,18 +60,18 @@
 
 === Invalid BlockdevRef ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vdi', 'file': "this doesn't exist", 'size': 33554432}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": "this doesn't exist", "size": 33554432}}}
+{"return": {}}
 Job failed: Cannot find device=this doesn't exist nor node_name=this doesn't exist
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Zero size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vdi', 'file': 'node0', 'size': 0}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": "node0", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -80,10 +80,10 @@
 
 === Maximum size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vdi', 'file': 'node0', 'size': 562949819203584}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": "node0", "size": 562949819203584}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -92,21 +92,21 @@
 
 === Invalid sizes ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vdi', 'file': 'node0', 'size': 18446744073709551104L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": "node0", "size": 18446744073709551104}}}
+{"return": {}}
 Job failed: Unsupported VDI image size (size is 0xfffffffffffffe00, max supported is 0x1fffff8000000)
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vdi', 'file': 'node0', 'size': 9223372036854775808L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": "node0", "size": 9223372036854775808}}}
+{"return": {}}
 Job failed: Unsupported VDI image size (size is 0x8000000000000000, max supported is 0x1fffff8000000)
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vdi', 'file': 'node0', 'size': 562949819203585}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vdi", "file": "node0", "size": 562949819203585}}}
+{"return": {}}
 Job failed: Unsupported VDI image size (size is 0x1fffff8000001, max supported is 0x1fffff8000000)
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
diff --git a/tests/qemu-iotests/212.out b/tests/qemu-iotests/212.out
index 9150da7..01da467 100644
--- a/tests/qemu-iotests/212.out
+++ b/tests/qemu-iotests/212.out
@@ -1,16 +1,16 @@
 === Successful image creation (defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.parallels'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.parallels", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-add', 'arguments': {'node_name': 'imgfile', 'driver': 'file', 'filename': 'TEST_DIR/PID-t.parallels'}}
-{u'return': {}}
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': 'imgfile', 'size': 134217728}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-add", "arguments": {"driver": "file", "filename": "TEST_DIR/PID-t.parallels", "node_name": "imgfile"}}
+{"return": {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "imgfile", "size": 134217728}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -18,15 +18,15 @@
 
 === Successful image creation (explicit defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.parallels'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.parallels", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 1048576, 'driver': 'parallels', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.parallels'}, 'size': 67108864}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 1048576, "driver": "parallels", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.parallels"}, "size": 67108864}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -34,15 +34,15 @@
 
 === Successful image creation (with non-default options) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.parallels'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.parallels", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 65536, 'driver': 'parallels', 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.parallels'}, 'size': 33554432}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 65536, "driver": "parallels", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.parallels"}, "size": 33554432}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -50,18 +50,18 @@
 
 === Invalid BlockdevRef ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': "this doesn't exist", 'size': 33554432}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "this doesn't exist", "size": 33554432}}}
+{"return": {}}
 Job failed: Cannot find device=this doesn't exist nor node_name=this doesn't exist
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Zero size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': 'node0', 'size': 0}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "node0", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -69,10 +69,10 @@
 
 === Maximum size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': 'node0', 'size': 4503599627369984}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "node0", "size": 4503599627369984}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -80,77 +80,77 @@
 
 === Invalid sizes ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': 'node0', 'size': 1234}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "node0", "size": 1234}}}
+{"return": {}}
 Job failed: Image size must be a multiple of 512 bytes
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': 'node0', 'size': 18446744073709551104L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "node0", "size": 18446744073709551104}}}
+{"return": {}}
 Job failed: Image size is too large for this cluster size
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': 'node0', 'size': 9223372036854775808L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "node0", "size": 9223372036854775808}}}
+{"return": {}}
 Job failed: Image size is too large for this cluster size
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': 'node0', 'size': 9223372036854775296}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "node0", "size": 9223372036854775296}}}
+{"return": {}}
 Job failed: Image size is too large for this cluster size
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'parallels', 'file': 'node0', 'size': 4503599627370497}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "parallels", "file": "node0", "size": 4503599627370497}}}
+{"return": {}}
 Job failed: Image size is too large for this cluster size
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Invalid cluster size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 1234, 'driver': 'parallels', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 1234, "driver": "parallels", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size must be a multiple of 512 bytes
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 128, 'driver': 'parallels', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 128, "driver": "parallels", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size must be a multiple of 512 bytes
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 4294967296, 'driver': 'parallels', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 4294967296, "driver": "parallels", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size is too large
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 9223372036854775808L, 'driver': 'parallels', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 9223372036854775808, "driver": "parallels", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size is too large
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 18446744073709551104L, 'driver': 'parallels', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 18446744073709551104, "driver": "parallels", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Cluster size is too large
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 0, 'driver': 'parallels', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 0, "driver": "parallels", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Image size is too large for this cluster size
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'cluster-size': 512, 'driver': 'parallels', 'file': 'node0', 'size': 281474976710656}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"cluster-size": 512, "driver": "parallels", "file": "node0", "size": 281474976710656}}}
+{"return": {}}
 Job failed: Image size is too large for this cluster size
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
diff --git a/tests/qemu-iotests/213.out b/tests/qemu-iotests/213.out
index e1dcd47..0c9d65b 100644
--- a/tests/qemu-iotests/213.out
+++ b/tests/qemu-iotests/213.out
@@ -1,16 +1,16 @@
 === Successful image creation (defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.vhdx'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.vhdx", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-add', 'arguments': {'node_name': 'imgfile', 'driver': 'file', 'filename': 'TEST_DIR/PID-t.vhdx'}}
-{u'return': {}}
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'file': 'imgfile', 'size': 134217728}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-add", "arguments": {"driver": "file", "filename": "TEST_DIR/PID-t.vhdx", "node_name": "imgfile"}}
+{"return": {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "imgfile", "size": 134217728}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -19,15 +19,15 @@
 
 === Successful image creation (explicit defaults) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.vhdx'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.vhdx", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'block-size': 8388608, 'driver': 'vhdx', 'subformat': 'dynamic', 'log-size': 1048576, 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.vhdx'}, 'block-state-zero': True, 'size': 67108864}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"block-size": 8388608, "block-state-zero": true, "driver": "vhdx", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.vhdx"}, "log-size": 1048576, "size": 67108864, "subformat": "dynamic"}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -36,15 +36,15 @@
 
 === Successful image creation (with non-default options) ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'size': 0, 'driver': 'file', 'filename': 'TEST_DIR/PID-t.vhdx'}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-t.vhdx", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'block-size': 268435456, 'driver': 'vhdx', 'subformat': 'fixed', 'log-size': 8388608, 'file': {'driver': 'file', 'filename': 'TEST_DIR/PID-t.vhdx'}, 'block-state-zero': False, 'size': 33554432}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"block-size": 268435456, "block-state-zero": false, "driver": "vhdx", "file": {"driver": "file", "filename": "TEST_DIR/PID-t.vhdx"}, "log-size": 8388608, "size": 33554432, "subformat": "fixed"}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -53,18 +53,18 @@
 
 === Invalid BlockdevRef ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'file': "this doesn't exist", 'size': 33554432}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "this doesn't exist", "size": 33554432}}}
+{"return": {}}
 Job failed: Cannot find device=this doesn't exist nor node_name=this doesn't exist
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Zero size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'file': 'node0', 'size': 0}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "size": 0}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -73,10 +73,10 @@
 
 === Maximum size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'file': 'node0', 'size': 70368744177664}}}
-{u'return': {}}
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "size": 70368744177664}}}
+{"return": {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 image: TEST_IMG
 file format: IMGFMT
@@ -85,85 +85,85 @@
 
 === Invalid sizes ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'file': 'node0', 'size': 18446744073709551104L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "size": 18446744073709551104}}}
+{"return": {}}
 Job failed: Image size too large; max of 64TB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'file': 'node0', 'size': 9223372036854775808L}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "size": 9223372036854775808}}}
+{"return": {}}
 Job failed: Image size too large; max of 64TB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'file': 'node0', 'size': 9223372036854775296}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "size": 9223372036854775296}}}
+{"return": {}}
 Job failed: Image size too large; max of 64TB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'file': 'node0', 'size': 70368744177665}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "size": 70368744177665}}}
+{"return": {}}
 Job failed: Image size too large; max of 64TB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Invalid block size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'block-size': 1234567, 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"block-size": 1234567, "driver": "vhdx", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Block size must be a multiple of 1 MB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'block-size': 128, 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"block-size": 128, "driver": "vhdx", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Block size must be a multiple of 1 MB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'block-size': 3145728, 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"block-size": 3145728, "driver": "vhdx", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Block size must be a power of two
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'block-size': 536870912, 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"block-size": 536870912, "driver": "vhdx", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Block size must not exceed 268435456
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'driver': 'vhdx', 'block-size': 0, 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"block-size": 0, "driver": "vhdx", "file": "node0", "size": 67108864}}}
+{"return": {}}
 Job failed: Block size must be a multiple of 1 MB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
 === Invalid log size ===
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'log-size': 1234567, 'driver': 'vhdx', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "log-size": 1234567, "size": 67108864}}}
+{"return": {}}
 Job failed: Log size must be a multiple of 1 MB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'log-size': 128, 'driver': 'vhdx', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "log-size": 128, "size": 67108864}}}
+{"return": {}}
 Job failed: Log size must be a multiple of 1 MB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'log-size': 4294967296, 'driver': 'vhdx', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "log-size": 4294967296, "size": 67108864}}}
+{"return": {}}
 Job failed: Log size must be smaller than 4 GB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
-{'execute': 'blockdev-create', 'arguments': {'job_id': 'job0', 'options': {'log-size': 0, 'driver': 'vhdx', 'file': 'node0', 'size': 67108864}}}
-{u'return': {}}
+{"execute": "blockdev-create", "arguments": {"job_id": "job0", "options": {"driver": "vhdx", "file": "node0", "log-size": 0, "size": 67108864}}}
+{"return": {}}
 Job failed: Log size must be a multiple of 1 MB
-{'execute': 'job-dismiss', 'arguments': {'id': 'job0'}}
-{u'return': {}}
+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
+{"return": {}}
 
diff --git a/tests/qemu-iotests/216.out b/tests/qemu-iotests/216.out
index 45ea857..a70aa5c 100644
--- a/tests/qemu-iotests/216.out
+++ b/tests/qemu-iotests/216.out
@@ -7,8 +7,8 @@
 
 --- Doing COR ---
 
-{u'return': {}}
-{u'return': u''}
+{"return": {}}
+{"return": ""}
 
 --- Checking COR result ---
 
diff --git a/tests/qemu-iotests/218.out b/tests/qemu-iotests/218.out
index 7dbf78e..825a657 100644
--- a/tests/qemu-iotests/218.out
+++ b/tests/qemu-iotests/218.out
@@ -4,27 +4,27 @@
 --- force=false ---
 
 Cancelling job
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror', u'type': u'mirror', u'speed': 65536, u'len': 1048576, u'offset': 65536}, u'event': u'BLOCK_JOB_CANCELLED'}
+{"return": {}}
+{"data": {"device": "mirror", "len": 1048576, "offset": 65536, "speed": 65536, "type": "mirror"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 
 --- force=true ---
 
 Cancelling job
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror', u'type': u'mirror', u'speed': 65536, u'len': 1048576, u'offset': 65536}, u'event': u'BLOCK_JOB_CANCELLED'}
+{"return": {}}
+{"data": {"device": "mirror", "len": 1048576, "offset": 65536, "speed": 65536, "type": "mirror"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 
 === Cancel mirror job after convergence ===
 
 --- force=false ---
 
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror', u'type': u'mirror', u'speed': 0, u'len': 1048576, u'offset': 1048576}, u'event': u'BLOCK_JOB_READY'}
+{"data": {"device": "mirror", "len": 1048576, "offset": 1048576, "speed": 0, "type": "mirror"}, "event": "BLOCK_JOB_READY", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 Cancelling job
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror', u'type': u'mirror', u'speed': 0, u'len': 1048576, u'offset': 1048576}, u'event': u'BLOCK_JOB_COMPLETED'}
+{"return": {}}
+{"data": {"device": "mirror", "len": 1048576, "offset": 1048576, "speed": 0, "type": "mirror"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 
 --- force=true ---
 
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror', u'type': u'mirror', u'speed': 0, u'len': 1048576, u'offset': 1048576}, u'event': u'BLOCK_JOB_READY'}
+{"data": {"device": "mirror", "len": 1048576, "offset": 1048576, "speed": 0, "type": "mirror"}, "event": "BLOCK_JOB_READY", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 Cancelling job
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'mirror', u'type': u'mirror', u'speed': 0, u'len': 1048576, u'offset': 1048576}, u'event': u'BLOCK_JOB_CANCELLED'}
+{"return": {}}
+{"data": {"device": "mirror", "len": 1048576, "offset": 1048576, "speed": 0, "type": "mirror"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
diff --git a/tests/qemu-iotests/219.out b/tests/qemu-iotests/219.out
index 6dc07bc..8ebd3fe 100644
--- a/tests/qemu-iotests/219.out
+++ b/tests/qemu-iotests/219.out
@@ -2,326 +2,326 @@
 
 
 Starting block job: drive-mirror (auto-finalize: True; auto-dismiss: True)
-{u'return': {}}
-{u'return': [{u'status': u'running', u'current-progress': 'FILTERED', u'total-progress': 'FILTERED', u'id': u'job0', u'type': u'mirror'}]}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'created', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
+{"return": {}}
+{"return": [{"current-progress": "FILTERED", "id": "job0", "status": "running", "total-progress": "FILTERED", "type": "mirror"}]}
+{"data": {"id": "job0", "status": "created"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 
 Pause/resume in RUNNING
 === Testing block-job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 65536, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 65536, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "mirror"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "running", "total-progress": 4194304, "type": "mirror"}]}
 === Testing block-job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "mirror"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "running", "total-progress": 4194304, "type": "mirror"}]}
 === Testing job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "mirror"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "running", "total-progress": 4194304, "type": "mirror"}]}
 === Testing job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 327680, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'return': {}}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "mirror"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 327680, "id": "job0", "status": "running", "total-progress": 4194304, "type": "mirror"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"return": {}}
 
 Waiting for READY state...
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'ready', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'ready', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
+{"data": {"id": "job0", "status": "ready"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "ready", "total-progress": 4194304, "type": "mirror"}]}
 
 Pause/resume in READY
 === Testing block-job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'standby', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'standby', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'ready', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'ready', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "standby"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "standby", "total-progress": 4194304, "type": "mirror"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "ready"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "ready", "total-progress": 4194304, "type": "mirror"}]}
 === Testing block-job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'standby', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'standby', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'ready', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'ready', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "standby"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "standby", "total-progress": 4194304, "type": "mirror"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "ready"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "ready", "total-progress": 4194304, "type": "mirror"}]}
 === Testing job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'standby', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'standby', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'ready', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'ready', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "standby"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "standby", "total-progress": 4194304, "type": "mirror"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "ready"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "ready", "total-progress": 4194304, "type": "mirror"}]}
 === Testing job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'standby', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'standby', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'ready', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'ready', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'mirror'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'ready' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'ready' cannot accept command verb 'dismiss'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'ready' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'ready' cannot accept command verb 'dismiss'"}}
-{u'return': {}}
+{"return": {}}
+{"data": {"id": "job0", "status": "standby"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "standby", "total-progress": 4194304, "type": "mirror"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "ready"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "ready", "total-progress": 4194304, "type": "mirror"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'ready' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'ready' cannot accept command verb 'dismiss'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'ready' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'ready' cannot accept command verb 'dismiss'"}}
+{"return": {}}
 
 Waiting for PENDING state...
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'waiting', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'pending', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'concluded', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'null', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': []}
+{"data": {"id": "job0", "status": "waiting"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "pending"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "concluded"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "null"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": []}
 
 
 Starting block job: drive-backup (auto-finalize: True; auto-dismiss: True)
-{u'return': {}}
-{u'return': [{u'status': u'running', u'current-progress': 'FILTERED', u'total-progress': 'FILTERED', u'id': u'job0', u'type': u'backup'}]}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'created', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
+{"return": {}}
+{"return": [{"current-progress": "FILTERED", "id": "job0", "status": "running", "total-progress": "FILTERED", "type": "backup"}]}
+{"data": {"id": "job0", "status": "created"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 
 Pause/resume in RUNNING
 === Testing block-job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 65536, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 65536, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing block-job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 327680, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'return': {}}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 327680, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"return": {}}
 
 Waiting for PENDING state...
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'waiting', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'pending', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'concluded', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'null', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': []}
+{"data": {"id": "job0", "status": "waiting"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "pending"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "concluded"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "null"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": []}
 
 
 Starting block job: drive-backup (auto-finalize: True; auto-dismiss: False)
-{u'return': {}}
-{u'return': [{u'status': u'running', u'current-progress': 'FILTERED', u'total-progress': 'FILTERED', u'id': u'job0', u'type': u'backup'}]}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'created', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
+{"return": {}}
+{"return": [{"current-progress": "FILTERED", "id": "job0", "status": "running", "total-progress": "FILTERED", "type": "backup"}]}
+{"data": {"id": "job0", "status": "created"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 
 Pause/resume in RUNNING
 === Testing block-job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 65536, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 65536, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing block-job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 327680, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'return': {}}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 327680, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"return": {}}
 
 Waiting for PENDING state...
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'waiting', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'pending', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'concluded', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'concluded', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'pause'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'pause'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'finalize'"}}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'null', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': []}
+{"data": {"id": "job0", "status": "waiting"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "pending"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "concluded"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "concluded", "total-progress": 4194304, "type": "backup"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'pause'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'pause'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'finalize'"}}
+{"return": {}}
+{"data": {"id": "job0", "status": "null"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": []}
 
 
 Starting block job: drive-backup (auto-finalize: False; auto-dismiss: True)
-{u'return': {}}
-{u'return': [{u'status': u'running', u'current-progress': 'FILTERED', u'total-progress': 'FILTERED', u'id': u'job0', u'type': u'backup'}]}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'created', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
+{"return": {}}
+{"return": [{"current-progress": "FILTERED", "id": "job0", "status": "running", "total-progress": "FILTERED", "type": "backup"}]}
+{"data": {"id": "job0", "status": "created"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 
 Pause/resume in RUNNING
 === Testing block-job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 65536, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 65536, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing block-job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 327680, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'return': {}}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 327680, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"return": {}}
 
 Waiting for PENDING state...
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'waiting', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'pending', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'pending', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'pause'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'dismiss'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'pause'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'dismiss'"}}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'concluded', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'null', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': []}
+{"data": {"id": "job0", "status": "waiting"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "pending"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "pending", "total-progress": 4194304, "type": "backup"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'pause'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'dismiss'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'pause'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'dismiss'"}}
+{"return": {}}
+{"data": {"id": "job0", "status": "concluded"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "null"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": []}
 
 
 Starting block job: drive-backup (auto-finalize: False; auto-dismiss: False)
-{u'return': {}}
-{u'return': [{u'status': u'running', u'current-progress': 'FILTERED', u'total-progress': 'FILTERED', u'id': u'job0', u'type': u'backup'}]}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'created', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
+{"return": {}}
+{"return": [{"current-progress": "FILTERED", "id": "job0", "status": "running", "total-progress": "FILTERED", "type": "backup"}]}
+{"data": {"id": "job0", "status": "created"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 
 Pause/resume in RUNNING
 === Testing block-job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 65536, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 65536, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing block-job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 131072, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 131072, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing job-pause/block-job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 196608, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 196608, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
 === Testing job-pause/job-resume ===
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'paused', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'paused', u'current-progress': 262144, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'running', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'running', u'current-progress': 327680, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
-{u'return': {}}
+{"return": {}}
+{"data": {"id": "job0", "status": "paused"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 262144, "id": "job0", "status": "paused", "total-progress": 4194304, "type": "backup"}]}
+{"return": {}}
+{"data": {"id": "job0", "status": "running"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 327680, "id": "job0", "status": "running", "total-progress": 4194304, "type": "backup"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'running' cannot accept command verb 'dismiss'"}}
+{"return": {}}
 
 Waiting for PENDING state...
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'waiting', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'pending', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'pending', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'pause'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'dismiss'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'pause'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'pending' cannot accept command verb 'dismiss'"}}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'concluded', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': [{u'status': u'concluded', u'current-progress': 4194304, u'total-progress': 4194304, u'id': u'job0', u'type': u'backup'}]}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'pause'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'finalize'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'pause'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'complete'"}}
-{u'error': {u'class': u'GenericError', u'desc': u"Job 'job0' in state 'concluded' cannot accept command verb 'finalize'"}}
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'status': u'null', u'id': u'job0'}, u'event': u'JOB_STATUS_CHANGE'}
-{u'return': []}
+{"data": {"id": "job0", "status": "waiting"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"data": {"id": "job0", "status": "pending"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "pending", "total-progress": 4194304, "type": "backup"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'pause'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'dismiss'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'pause'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'pending' cannot accept command verb 'dismiss'"}}
+{"return": {}}
+{"data": {"id": "job0", "status": "concluded"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": [{"current-progress": 4194304, "id": "job0", "status": "concluded", "total-progress": 4194304, "type": "backup"}]}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'pause'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'finalize'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'pause'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'complete'"}}
+{"error": {"class": "GenericError", "desc": "Job 'job0' in state 'concluded' cannot accept command verb 'finalize'"}}
+{"return": {}}
+{"data": {"id": "job0", "status": "null"}, "event": "JOB_STATUS_CHANGE", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": []}
diff --git a/tests/qemu-iotests/222.out b/tests/qemu-iotests/222.out
index 48f336a..16643dd 100644
--- a/tests/qemu-iotests/222.out
+++ b/tests/qemu-iotests/222.out
@@ -8,13 +8,13 @@
 
 --- Setting up Fleecing Graph ---
 
-{u'return': {}}
-{u'return': {}}
+{"return": {}}
+{"return": {}}
 
 --- Setting up NBD Export ---
 
-{u'return': {}}
-{u'return': {}}
+{"return": {}}
+{"return": {}}
 
 --- Sanity Check ---
 
@@ -29,13 +29,13 @@
 --- Testing COW ---
 
 write -P0xab 0 64k
-{u'return': u''}
+{"return": ""}
 write -P0xad 0x00f8000 64k
-{u'return': u''}
+{"return": ""}
 write -P0x1d 0x2008000 64k
-{u'return': u''}
+{"return": ""}
 write -P0xea 0x3fe0000 64k
-{u'return': u''}
+{"return": ""}
 
 --- Verifying Data ---
 
@@ -49,10 +49,10 @@
 
 --- Cleanup ---
 
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': {u'device': u'drive0', u'type': u'backup', u'speed': 0, u'len': 67108864, u'offset': 393216}, u'event': u'BLOCK_JOB_CANCELLED'}
-{u'return': {}}
-{u'return': {}}
+{"return": {}}
+{"data": {"device": "drive0", "len": 67108864, "offset": 393216, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"return": {}}
+{"return": {}}
 
 --- Confirming writes ---
 
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 4e67fbb..27bb2b6 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -29,6 +29,7 @@
 import signal
 import logging
 import atexit
+import io
 
 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts'))
 import qtest
@@ -104,7 +105,8 @@
     '''Run qemu-img and return its output'''
     subp = subprocess.Popen(qemu_img_args + list(args),
                             stdout=subprocess.PIPE,
-                            stderr=subprocess.STDOUT)
+                            stderr=subprocess.STDOUT,
+                            universal_newlines=True)
     exitcode = subp.wait()
     if exitcode < 0:
         sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
@@ -128,7 +130,8 @@
     '''Run qemu-io and return the stdout data'''
     args = qemu_io_args + list(args)
     subp = subprocess.Popen(args, stdout=subprocess.PIPE,
-                            stderr=subprocess.STDOUT)
+                            stderr=subprocess.STDOUT,
+                            universal_newlines=True)
     exitcode = subp.wait()
     if exitcode < 0:
         sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args)))
@@ -149,7 +152,8 @@
         self.args = qemu_io_args + list(args)
         self._p = subprocess.Popen(self.args, stdin=subprocess.PIPE,
                                    stdout=subprocess.PIPE,
-                                   stderr=subprocess.STDOUT)
+                                   stderr=subprocess.STDOUT,
+                                   universal_newlines=True)
         assert self._p.stdout.read(9) == 'qemu-io> '
 
     def close(self):
@@ -178,6 +182,7 @@
         cmd = cmd.strip()
         assert cmd != 'q' and cmd != 'quit'
         self._p.stdin.write(cmd + '\n')
+        self._p.stdin.flush()
         return self._read_output()
 
 
@@ -192,10 +197,10 @@
 
 def create_image(name, size):
     '''Create a fully-allocated raw image with sector markers'''
-    file = open(name, 'w')
+    file = open(name, 'wb')
     i = 0
     while i < size:
-        sector = struct.pack('>l504xl', i / 512, i / 512)
+        sector = struct.pack('>l504xl', i // 512, i // 512)
         file.write(sector)
         i = i + 512
     file.close()
@@ -249,7 +254,10 @@
 def log(msg, filters=[]):
     for flt in filters:
         msg = flt(msg)
-    print(msg)
+    if type(msg) is dict or type(msg) is list:
+        print(json.dumps(msg, sort_keys=True))
+    else:
+        print(msg)
 
 class Timeout:
     def __init__(self, seconds, errmsg = "Timeout"):
@@ -437,10 +445,11 @@
         return result
 
     def qmp_log(self, cmd, filters=[filter_testfiles], **kwargs):
-        logmsg = "{'execute': '%s', 'arguments': %s}" % (cmd, kwargs)
+        logmsg = '{"execute": "%s", "arguments": %s}' % \
+            (cmd, json.dumps(kwargs, sort_keys=True))
         log(logmsg, filters)
         result = self.qmp(cmd, **kwargs)
-        log(str(result), filters)
+        log(json.dumps(result, sort_keys=True), filters)
         return result
 
     def run_job(self, job, auto_finalize=True, auto_dismiss=False):
@@ -677,15 +686,19 @@
     verify_platform(supported_oses)
     verify_cache_mode(supported_cache_modes)
 
-    # We need to filter out the time taken from the output so that qemu-iotest
-    # can reliably diff the results against master output.
-    import StringIO
     if debug:
         output = sys.stdout
         verbosity = 2
         sys.argv.remove('-d')
     else:
-        output = StringIO.StringIO()
+        # We need to filter out the time taken from the output so that
+        # qemu-iotest can reliably diff the results against master output.
+        if sys.version_info.major >= 3:
+            output = io.StringIO()
+        else:
+            # io.StringIO is for unicode strings, which is not what
+            # 2.x's test runner emits.
+            output = io.BytesIO()
 
     logging.basicConfig(level=(logging.DEBUG if debug else logging.WARN))
 
diff --git a/tests/qemu-iotests/nbd-fault-injector.py b/tests/qemu-iotests/nbd-fault-injector.py
index f9193c0..6b2d659 100755
--- a/tests/qemu-iotests/nbd-fault-injector.py
+++ b/tests/qemu-iotests/nbd-fault-injector.py
@@ -48,7 +48,10 @@
 import socket
 import struct
 import collections
-import ConfigParser
+if sys.version_info.major >= 3:
+    import configparser
+else:
+    import ConfigParser as configparser
 
 FAKE_DISK_SIZE = 8 * 1024 * 1024 * 1024 # 8 GB
 
@@ -86,7 +89,7 @@
             raise Exception('unexpected disconnect')
         chunks.append(chunk)
         received += len(chunk)
-    return ''.join(chunks)
+    return b''.join(chunks)
 
 class Rule(object):
     def __init__(self, name, event, io, when):
@@ -112,6 +115,7 @@
             if rule.match(event, io):
                 if rule.when == 0 or bufsize is None:
                     print('Closing connection on rule match %s' % rule.name)
+                    self.sock.flush()
                     sys.exit(0)
                 if rule.when != -1:
                     return rule.when
@@ -176,7 +180,7 @@
         req = read_request(conn)
         if req.type == NBD_CMD_READ:
             write_reply(conn, 0, req.handle)
-            conn.send('\0' * req.len, event='data')
+            conn.send(b'\0' * req.len, event='data')
         elif req.type == NBD_CMD_WRITE:
             _ = conn.recv(req.len, event='data')
             write_reply(conn, 0, req.handle)
@@ -224,7 +228,7 @@
     return rules
 
 def load_rules(filename):
-    config = ConfigParser.RawConfigParser()
+    config = configparser.RawConfigParser()
     with open(filename, 'rt') as f:
         config.readfp(f, filename)
     return parse_config(config)
diff --git a/tests/qemu-iotests/qcow2.py b/tests/qemu-iotests/qcow2.py
index b95a837..b392972 100755
--- a/tests/qemu-iotests/qcow2.py
+++ b/tests/qemu-iotests/qcow2.py
@@ -10,7 +10,7 @@
     def __init__(self, magic, length, data):
         if length % 8 != 0:
             padding = 8 - (length % 8)
-            data += "\0" * padding
+            data += b"\0" * padding
 
         self.magic  = magic
         self.length = length
@@ -103,7 +103,7 @@
 
         fd.seek(self.header_length)
         extensions = self.extensions
-        extensions.append(QcowHeaderExtension(0, 0, ""))
+        extensions.append(QcowHeaderExtension(0, 0, b""))
         for ex in extensions:
             buf = struct.pack('>II', ex.magic, ex.length)
             fd.write(buf)
@@ -137,8 +137,8 @@
         for ex in self.extensions:
 
             data = ex.data[:ex.length]
-            if all(c in string.printable for c in data):
-                data = "'%s'" % data
+            if all(c in string.printable.encode('ascii') for c in data):
+                data = "'%s'" % data.decode('ascii')
             else:
                 data = "<binary>"
 
@@ -178,7 +178,7 @@
         sys.exit(1)
 
     h = QcowHeader(fd)
-    h.extensions.append(QcowHeaderExtension.create(magic, data))
+    h.extensions.append(QcowHeaderExtension.create(magic, data.encode('ascii')))
     h.update(fd)
 
 def cmd_add_header_ext_stdio(fd, magic):
diff --git a/tests/qemu-iotests/qed.py b/tests/qemu-iotests/qed.py
index ea469b9..8adaaf4 100755
--- a/tests/qemu-iotests/qed.py
+++ b/tests/qemu-iotests/qed.py
@@ -80,7 +80,7 @@
 
     def load_l1_table(self):
         self.l1_table = self.read_table(self.header['l1_table_offset'])
-        self.table_nelems = self.header['table_size'] * self.header['cluster_size'] / table_elem_size
+        self.table_nelems = self.header['table_size'] * self.header['cluster_size'] // table_elem_size
 
     def write_table(self, offset, table):
         s = ''.join(pack_table_elem(x) for x in table)
@@ -167,14 +167,14 @@
         n = int(args[0])
 
     for i in xrange(n):
-        l1_index = pos / qed.header['cluster_size'] / len(qed.l1_table)
+        l1_index = pos // qed.header['cluster_size'] // len(qed.l1_table)
         if qed.l1_table[l1_index] == 0:
             err('no l2 table allocated')
 
         l2_offset = qed.l1_table[l1_index]
         l2_table = qed.read_table(l2_offset)
 
-        l2_index = (pos / qed.header['cluster_size']) % len(qed.l1_table)
+        l2_index = (pos // qed.header['cluster_size']) % len(qed.l1_table)
         l2_table[l2_index] = 1 # zero the data cluster
         qed.write_table(l2_offset, l2_table)
         pos += qed.header['cluster_size']
diff --git a/tests/requirements.txt b/tests/requirements.txt
new file mode 100644
index 0000000..64c6e27
--- /dev/null
+++ b/tests/requirements.txt
@@ -0,0 +1,4 @@
+# Add Python module requirements, one per line, to be installed
+# in the tests/venv Python virtual environment. For more info,
+# refer to: https://pip.pypa.io/en/stable/user_guide/#id1
+avocado-framework==65.0