diff --git a/qubesmanager/tests/__init__.py b/qubesmanager/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/qubesmanager/tests/test_global_settings.py b/qubesmanager/tests/test_global_settings.py
new file mode 100644
index 0000000..e489d11
--- /dev/null
+++ b/qubesmanager/tests/test_global_settings.py
@@ -0,0 +1,331 @@
+#!/usr/bin/python3
+#
+# The Qubes OS Project, https://www.qubes-os.org/
+#
+# Copyright (C) 2016 Marek Marczykowski-Górecki
+#                                       <marmarek@invisiblethingslab.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+import logging.handlers
+import sys
+import unittest
+import unittest.mock
+
+import time
+from PyQt4 import QtGui, QtTest, QtCore
+from qubesadmin import Qubes
+from qubes.tests import SystemTestCase
+import qubesmanager.global_settings as global_settings
+import concurrent.futures
+
+
+def wrap_in_loop(func):
+    def wrapped(self):
+        self.loop.run_until_complete(
+            self.loop.run_in_executor(self.executor,
+                                      func, self))
+    return wrapped
+
+
+class GlobalSettingsTest(SystemTestCase):
+    def setUp(self):
+        super(GlobalSettingsTest, self).setUp()
+
+        self.qtapp = QtGui.QApplication(sys.argv)
+        self.executor = concurrent.futures.ThreadPoolExecutor(max_workers=1)
+        self.setUpInExecutor()
+
+    @wrap_in_loop
+    def setUpInExecutor(self):
+        self.qapp = Qubes()
+        self.dialog = global_settings.GlobalSettingsWindow(
+                self.qtapp, self.qapp)
+
+    def tearDown(self):
+        self.tearDownInExecutor()
+        super(GlobalSettingsTest, self).tearDown()
+
+    @wrap_in_loop
+    def tearDownInExecutor(self):
+        del self.dialog
+        del self.qtapp
+
+    @wrap_in_loop
+    def test_settings_started(self):
+        # non-empty drop-downs
+        self.assertNotEqual(
+            self.dialog.default_kernel_combo.currentText(), "")
+        self.assertNotEqual(
+            self.dialog.default_netvm_combo.currentText(), "")
+        self.assertNotEqual(
+            self.dialog.default_template_combo.currentText(),
+            "")
+        self.assertNotEqual(
+            self.dialog.clock_vm_combo.currentText(), "")
+        self.assertNotEqual(
+            self.dialog.update_vm_combo.currentText(), "")
+
+    @wrap_in_loop
+    def test_load_correct_defs(self):
+        # correctly selected default template
+        selected_default_template = \
+            self.dialog.default_template_combo.currentText()
+        self.assertTrue(
+            selected_default_template.startswith(
+                self.app.default_template.name))
+
+        # correctly selected default NetVM
+        selected_default_netvm = \
+            self.dialog.default_netvm_combo.currentText()
+        self.assertTrue(selected_default_netvm.startswith(
+            self.app.default_netvm.name))
+
+        # correctly selected default kernel
+        selected_default_kernel = \
+            self.dialog.default_kernel_combo.currentText()
+        self.assertTrue(selected_default_kernel.startswith(
+            self.app.default_kernel))
+
+        # correct ClockVM
+        selected_clockvm = \
+            self.dialog.clock_vm_combo.currentText()
+        correct_clockvm = self.app.clockvm.name if self.app.clockvm \
+            else "(none)"
+        self.assertTrue(selected_clockvm.startswith(correct_clockvm))
+
+        # correct updateVM
+        selected_updatevm = \
+            self.dialog.update_vm_combo.currentText()
+        correct_updatevm = \
+            self.app.updatevm.name if self.app.updatevm else "(none)"
+        self.assertTrue(selected_updatevm.startswith(correct_updatevm))
+
+        # update vm status
+        self.assertEqual(self.app.check_updates_vm,
+                         self.dialog.updates_vm.isChecked())
+
+    def test_dom0_updates_load(self):
+        # check dom0 updates
+        try:
+            dom0_updates = self.app.check_updates_dom0
+        except AttributeError:
+            self.skipTest("check_updates_dom0 property not implemented")
+            return
+
+        self.assertEqual(dom0_updates, self.dialog.updates_dom0.isChecked())
+
+    def __set_noncurrent(self, widget):
+        if widget.count() < 2:
+            self.skipTest("not enough choices for " + widget.objectName())
+
+        widget.setCurrentIndex(0)
+        while widget.currentText().endswith("(current)") \
+                or widget.currentText().startswith("(none)"):
+            widget.setCurrentIndex(widget.currentIndex() + 1)
+
+        return widget.currentText()
+
+    def __set_none(self, widget):
+        widget.setCurrentIndex(0)
+        while not widget.currentText().startswith("(none)"):
+            if widget.currentIndex() == widget.count():
+                self.skipTest("none not available for " + widget.objectName())
+            widget.setCurrentIndex(widget.currentIndex() + 1)
+
+    def __click_ok(self):
+        okwidget = self.dialog.buttonBox.button(
+                    self.dialog.buttonBox.Ok)
+
+        QtTest.QTest.mouseClick(okwidget,
+                                QtCore.Qt.LeftButton)
+
+    @wrap_in_loop
+    def test_set_update_vm(self):
+        new_updatevm_name = self.__set_noncurrent(self.dialog.update_vm_combo)
+        self.__click_ok()
+
+        self.assertEqual(self.app.updatevm.name, new_updatevm_name)
+
+    @wrap_in_loop
+    def test_set_update_vm_to_none(self):
+        self.__set_none(self.dialog.update_vm_combo)
+        self.__click_ok()
+
+        self.assertIsNone(self.app.updatevm)
+
+    @wrap_in_loop
+    def test_set_update_vm_to_none2(self):
+        self.app.updatevm = None
+        self.dialog = global_settings.GlobalSettingsWindow(
+            self.qtapp, self.qapp)
+
+        self.assertEqual(self.dialog.update_vm_combo.currentText(),
+                         "(none) (current)")
+
+    @wrap_in_loop
+    def test_set_clock_vm(self):
+        new_clockvm_name = self.__set_noncurrent(self.dialog.clock_vm_combo)
+        self.__click_ok()
+
+        self.assertEqual(self.app.clockvm.name, new_clockvm_name)
+
+    @wrap_in_loop
+    def test_set_clock_vm_to_none(self):
+        self.__set_none(self.dialog.clock_vm_combo)
+        self.__click_ok()
+
+        self.assertIsNone(self.app.clockvm)
+
+    @wrap_in_loop
+    def test_set_clock_vm_to_none2(self):
+        self.app.clockvm = None
+        self.dialog = global_settings.GlobalSettingsWindow(
+                self.qtapp, self.qapp)
+
+        self.assertEqual(self.dialog.clock_vm_combo.currentText(),
+                         "(none) (current)")
+
+    @wrap_in_loop
+    def test_set_default_netvm(self):
+        new_netvm_name = self.__set_noncurrent(self.dialog.default_netvm_combo)
+        self.__click_ok()
+
+        self.assertEqual(self.app.default_netvm.name, new_netvm_name)
+
+    @wrap_in_loop
+    def test_set_default_netvm_to_none(self):
+        self.__set_none(self.dialog.default_netvm_combo)
+        self.__click_ok()
+
+        self.assertIsNone(self.app.default_netvm)
+
+    @wrap_in_loop
+    def test_set_default_netvm_to_none2(self):
+        self.app.default_netvm = None
+        self.dialog = global_settings.GlobalSettingsWindow(
+                self.qtapp, self.qapp)
+
+        self.assertEqual(self.dialog.default_netvm_combo.currentText(),
+                         "(none) (current)")
+
+    @wrap_in_loop
+    def test_set_default_template(self):
+        new_def_template_name = self.__set_noncurrent(
+            self.dialog.default_template_combo)
+        self.__click_ok()
+
+        self.assertEqual(self.app.default_template.name, new_def_template_name)
+
+    @wrap_in_loop
+    def test_set_default_kernel(self):
+        new_def_kernel_name = self.__set_noncurrent(
+            self.dialog.default_kernel_combo)
+        self.__click_ok()
+
+        self.assertEqual(self.app.default_kernel, new_def_kernel_name)
+
+    @wrap_in_loop
+    def test_set_default_kernel_to_none(self):
+        self.__set_none(self.dialog.default_kernel_combo)
+        self.__click_ok()
+
+        self.assertEqual(self.app.default_kernel, '')
+
+    @wrap_in_loop
+    def test_set_default_kernel_to_none2(self):
+        self.app.default_kernel = None
+        self.dialog = global_settings.GlobalSettingsWindow(
+                self.qtapp, self.qapp)
+
+        self.assertEqual(self.dialog.default_kernel_combo.currentText(),
+                         "(none) (current)")
+
+    @wrap_in_loop
+    def test_set_dom0_updates_true(self):
+        self.dialog.updates_dom0.setChecked(True)
+        self.__click_ok()
+
+        if not hasattr(self.app, 'check_updates_dom0'):
+            self.skipTest("check_updates_dom0 property not implemented")
+
+        self.assertTrue(self.app.check_updates_dom0)
+
+    @wrap_in_loop
+    def test_set_dom0_updates_false(self):
+        self.dialog.updates_dom0.setChecked(False)
+        self.__click_ok()
+
+        if not hasattr(self.app, 'check_updates_dom0'):
+            self.skipTest("check_updates_dom0 property not implemented")
+
+        self.assertFalse(self.app.check_updates_dom0)
+
+    @wrap_in_loop
+    def test_set_vm_updates_true(self):
+        self.dialog.updates_vm.setChecked(True)
+        self.__click_ok()
+
+        self.assertTrue(self.app.check_updates_vm)
+
+    @wrap_in_loop
+    def test_set_vm_updates_false(self):
+        self.dialog.updates_vm.setChecked(False)
+        self.__click_ok()
+
+        self.assertFalse(self.app.check_updates_vm)
+
+    @wrap_in_loop
+    def test_00set_all_vms_true(self):
+
+        with unittest.mock.patch("PyQt4.QtGui.QMessageBox.question",
+                                 return_value=QtGui.QMessageBox.Yes) as msgbox:
+
+            QtTest.QTest.mouseClick(self.dialog.enable_updates_all,
+                                    QtCore.Qt.LeftButton)
+
+            msgbox.assert_called_once_with(
+                self.dialog,
+                "Change state of all qubes",
+                "Are you sure you want to set all qubes to check for updates?",
+                unittest.mock.ANY)
+
+        for vm in self.app.domains:
+            self.assertTrue(vm.features['check-updates'])
+
+    @wrap_in_loop
+    def test_00set_all_vms_false(self):
+        with unittest.mock.patch("PyQt4.QtGui.QMessageBox.question",
+                                 return_value=QtGui.QMessageBox.Yes) as msgbox:
+            QtTest.QTest.mouseClick(self.dialog.disable_updates_all,
+                                    QtCore.Qt.LeftButton)
+
+            msgbox.assert_called_once_with(
+                self.dialog,
+                "Change state of all qubes",
+                "Are you sure you want to set all qubes to not check "
+                "for updates?",
+                unittest.mock.ANY)
+
+        for vm in self.app.domains:
+            self.assertFalse(vm.features['check-updates'])
+
+
+if __name__ == "__main__":
+    ha_syslog = logging.handlers.SysLogHandler('/dev/log')
+    ha_syslog.setFormatter(
+        logging.Formatter('%(name)s[%(process)d]: %(message)s'))
+    logging.root.addHandler(ha_syslog)
+    unittest.main()
diff --git a/setup.py b/setup.py
index 721284c..f0388a8 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@ if __name__ == '__main__':
         description='Qubes OS Manager',
         license='GPL2+',
         url='https://www.qubes-os.org/',
-        packages=setuptools.find_packages(),
+        packages=setuptools.find_packages(exclude=['qubesmanager.tests']),
         package_data={
             'qubesmanager': ['i18n/*']
         },