ret = self.setUp()
File "/home/charles/canonical/src/unity8/indicator-power-autopilot-test/tests/autopilot/unity8/indicators/tests/test_indicator_power.py", line 88, in setUp
super(IndicatorPowerTestCase, self).setUp()
File "/home/charles/canonical/src/unity8/indicator-power-autopilot-test/tests/autopilot/unity8/indicators/tests/__init__.py", line 39, in setUp
super(IndicatorTestCase, self).setUp()
File "/home/charles/canonical/src/unity8/indicator-power-autopilot-test/tests/autopilot/unity8/shell/tests/__init__.py", line 168, in setUp
self._setup_display_details()
File "/home/charles/canonical/src/unity8/indicator-power-autopilot-test/tests/autopilot/unity8/shell/tests/__init__.py", line 172, in _setup_display_details
self._setup_grid_size(scale_divisor)
File "/home/charles/canonical/src/unity8/indicator-power-autopilot-test/tests/autopilot/unity8/shell/tests/__init__.py", line 202, in _setup_grid_size
self.grid_size = int(os.getenv('GRID_UNIT_PX'))
TypeError: int() argument must be a string or a number, not 'NoneType'