On my mako (using image 191) even with ~/.cache/QML wiped, the rotation tests now fail all the time with the usual...

Tests running...
Exception in thread Thread-2:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/psutil/_pslinux.py", line 694, in wrapper
    return fun(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/psutil/_pslinux.py", line 844, in create_time
    f = open("/proc/%s/stat" % self.pid, 'rb')
FileNotFoundError: [Errno 2] No such file or directory: '/proc/7492/stat'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/psutil/__init__.py", line 322, in _init
    self.create_time()
  File "/usr/lib/python3/dist-packages/psutil/__init__.py", line 576, in create_time
    self._create_time = self._proc.create_time()
  File "/usr/lib/python3/dist-packages/psutil/_pslinux.py", line 704, in wrapper
    raise NoSuchProcess(self.pid, self._name)
psutil.NoSuchProcess: process no longer exists (pid=7492)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.4/threading.py", line 920, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.4/threading.py", line 868, in run
    self._target(*self._args, **self._kwargs)
  File "/home/phablet/src/unity8-shellRotation/tests/autopilot/unity8/fixture_setup.py", line 141, in _restart_unity_with_testability
    *args)
  File "/home/phablet/src/unity8-shellRotation/tests/autopilot/unity8/process_helpers.py", line 148, in restart_unity_with_testability
    return restart_unity(*args)
  File "/home/phablet/src/unity8-shellRotation/tests/autopilot/unity8/process_helpers.py", line 165, in restart_unity
    return _get_unity_proxy_object(pid)
  File "/home/phablet/src/unity8-shellRotation/tests/autopilot/unity8/process_helpers.py", line 274, in _get_unity_proxy_object
    emulator_base=emulators.UnityEmulatorBase,
  File "/usr/lib/python3/dist-packages/autopilot/introspection/_search.py", line 171, in get_proxy_object_for_existing_process
    process
  File "/usr/lib/python3/dist-packages/autopilot/introspection/_search.py", line 318, in _find_matching_connections
    in connections
  File "/usr/lib/python3/dist-packages/autopilot/introspection/_search.py", line 319, in <listcomp>
    if connection_matcher((bus, c))
  File "/usr/lib/python3/dist-packages/autopilot/introspection/_search.py", line 292, in _filter_runner
    for f in filter_list
  File "/usr/lib/python3/dist-packages/autopilot/introspection/_search.py", line 292, in <genexpr>
    for f in filter_list
  File "/usr/lib/python3/dist-packages/autopilot/introspection/_search.py", line 758, in matches
    eligible_pids = [pid] + _get_child_pids(pid)
  File "/usr/lib/python3/dist-packages/autopilot/introspection/_search.py", line 660, in __call__
    p.pid for p in psutil.Process(pid).get_children(recursive=True)
  File "/usr/lib/python3/dist-packages/psutil/__init__.py", line 296, in __init__
    self._init(pid)
  File "/usr/lib/python3/dist-packages/psutil/__init__.py", line 331, in _init
    raise NoSuchProcess(pid, None, msg)
psutil.NoSuchProcess: no process found with pid 7492

... I'll try to figure out where this is coming from now.