diff --git a/patroni/__init__.py b/patroni/__init__.py
index 9badd6f7..72e11145 100644
--- a/patroni/__init__.py
+++ b/patroni/__init__.py
@@ -176,13 +176,13 @@ def main():
         if pid:
             os.kill(pid, signo)
 
-    signal.signal(signal.SIGCHLD, sigchld_handler)
     if os.name != 'nt':
+        signal.signal(signal.SIGCHLD, sigchld_handler)
         signal.signal(signal.SIGHUP, passtochild)
         signal.signal(signal.SIGQUIT, passtochild)
+        signal.signal(signal.SIGUSR1, passtochild)
+        signal.signal(signal.SIGUSR2, passtochild)
     signal.signal(signal.SIGINT, passtochild)
-    signal.signal(signal.SIGUSR1, passtochild)
-    signal.signal(signal.SIGUSR2, passtochild)
     signal.signal(signal.SIGABRT, passtochild)
     signal.signal(signal.SIGTERM, passtochild)
 
diff --git a/patroni/ctl.py b/patroni/ctl.py
index 7a2fc2d8..d1068916 100644
--- a/patroni/ctl.py
+++ b/patroni/ctl.py
@@ -63,8 +63,8 @@ def parse_dcs(dcs):
     elif scheme not in DCS_DEFAULTS:
         raise PatroniCtlException('Unknown dcs scheme: {}'.format(scheme))
 
-    dcs_info = DCS_DEFAULTS[scheme]
-    return yaml.load(dcs_info['template'].format(host=parsed.hostname or 'localhost', port=port or dcs_info['port']))
+    default = DCS_DEFAULTS[scheme]
+    return yaml.safe_load(default['template'].format(host=parsed.hostname or 'localhost', port=port or default['port']))
 
 
 def load_config(path, dcs):
diff --git a/patroni/watchdog/linux.py b/patroni/watchdog/linux.py
index 311dcd19..fcb363b2 100644
--- a/patroni/watchdog/linux.py
+++ b/patroni/watchdog/linux.py
@@ -1,6 +1,5 @@
 import collections
 import ctypes
-import fcntl
 import os
 import platform
 from patroni.watchdog.base import WatchdogBase, WatchdogError
@@ -162,7 +161,9 @@ class LinuxWatchdogDevice(WatchdogBase):
         Raises OSError or IOError (Python 2) when the ioctl fails."""
         if self._fd is None:
             raise WatchdogError("Watchdog device is closed")
-        fcntl.ioctl(self._fd, func, arg, True)
+        if os.name != 'nt':
+            import fcntl
+            fcntl.ioctl(self._fd, func, arg, True)
 
     def get_support(self):
         if self._support_cache is None:
diff --git a/tests/test_config.py b/tests/test_config.py
index f99f8e2a..357a227b 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -52,7 +52,7 @@ class TestConfig(unittest.TestCase):
             'PATRONI_ETCD_KEY': '/key',
             'PATRONI_CONSUL_HOST': '127.0.0.1:8500',
             'PATRONI_CONSUL_REGISTER_SERVICE': 'on',
-            'PATRONI_KUBERNETES_LABELS': 'a:b:c',
+            'PATRONI_KUBERNETES_LABELS': 'a: b: c',
             'PATRONI_KUBERNETES_SCOPE_LABEL': 'a',
             'PATRONI_KUBERNETES_PORTS': '[{"name": "postgresql"}]',
             'PATRONI_ZOOKEEPER_HOSTS': "'host1:2181','host2:2181'",
diff --git a/tests/test_ctl.py b/tests/test_ctl.py
index 297a1f7f..52681ffc 100644
--- a/tests/test_ctl.py
+++ b/tests/test_ctl.py
@@ -533,7 +533,8 @@ class TestCtl(unittest.TestCase):
         show_diff(b"foo:\n  bar: \xc3\xb6\xc3\xb6\n".decode('utf-8'),
                   b"foo:\n  bar: \xc3\xbc\xc3\xbc\n".decode('utf-8'))
 
-    def test_invoke_editor(self):
+    @patch('subprocess.call', return_value=1)
+    def test_invoke_editor(self, mock_subprocess_call):
         for e in ('', 'false'):
             os.environ['EDITOR'] = e
             self.assertRaises(PatroniCtlException, invoke_editor, 'foo: bar\n', 'test')
diff --git a/tests/test_patroni.py b/tests/test_patroni.py
index d2d061a9..2406279d 100644
--- a/tests/test_patroni.py
+++ b/tests/test_patroni.py
@@ -87,7 +87,7 @@ class TestPatroni(unittest.TestCase):
         ref = {'passtochild': lambda signo, stack_frame: 0}
 
         def mock_sighup(signo, handler):
-            if signo == signal.SIGHUP:
+            if hasattr(signal, 'SIGHUP') and signo == signal.SIGHUP:
                 ref['passtochild'] = handler
 
         def mock_join():
diff --git a/tests/test_postgresql.py b/tests/test_postgresql.py
index 8a94d727..e0288c04 100644
--- a/tests/test_postgresql.py
+++ b/tests/test_postgresql.py
@@ -15,6 +15,7 @@ from patroni.postmaster import PostmasterProcess
 from patroni.utils import RetryFailedError
 from six.moves import builtins
 from threading import Thread, current_thread
+from tempfile import gettempdir
 
 
 class MockCursor(object):
@@ -189,7 +190,8 @@ class TestPostgresql(unittest.TestCase):
         if not os.path.exists(self.data_dir):
             os.makedirs(self.data_dir)
         self.p = Postgresql({'name': 'test0', 'scope': 'batman', 'data_dir': self.data_dir,
-                             'config_dir': self.config_dir, 'retry_timeout': 10, 'pgpass': '/tmp/pgpass0',
+                             'config_dir': self.config_dir, 'retry_timeout': 10,
+                             'pgpass': os.path.join(gettempdir(), 'pgpass0'),
                              'listen': '127.0.0.2, 127.0.0.3:5432', 'connect_address': '127.0.0.2:5432',
                              'authentication': {'superuser': {'username': 'test', 'password': 'test'},
                                                 'replication': {'username': 'replicator', 'password': 'rep-pass'}},
@@ -721,12 +723,18 @@ class TestPostgresql(unittest.TestCase):
         self.assertEqual(self.p.get_postgres_role_from_data_directory(), 'replica')
 
     def test_remove_data_directory(self):
+        def _symlink(src, dst):
+            try:
+                os.symlink(src, dst)
+            except OSError:
+                if os.name == 'nt':  # os.symlink under Windows needs admin rights skip it
+                    pass
         os.makedirs(os.path.join(self.data_dir, 'foo'))
-        os.symlink('foo', os.path.join(self.data_dir, 'pg_wal'))
+        _symlink('foo', os.path.join(self.data_dir, 'pg_wal'))
         self.p.remove_data_directory()
         open(self.data_dir, 'w').close()
         self.p.remove_data_directory()
-        os.symlink('unexisting', self.data_dir)
+        _symlink('unexisting', self.data_dir)
         with patch('os.unlink', Mock(side_effect=OSError)):
             self.p.remove_data_directory()
         self.p.remove_data_directory()
diff --git a/tests/test_postmaster.py b/tests/test_postmaster.py
index c8e42363..6929f55e 100644
--- a/tests/test_postmaster.py
+++ b/tests/test_postmaster.py
@@ -6,6 +6,18 @@ from patroni.postmaster import PostmasterProcess
 from six.moves import builtins
 
 
+class MockProcess(object):
+    def __init__(self, target, args):
+        self.target = target
+        self.args = args
+
+    def start(self):
+        self.target(*self.args)
+
+    def join(self):
+        pass
+
+
 class TestPostmasterProcess(unittest.TestCase):
     @patch('psutil.Process.__init__', Mock())
     def test_init(self):
@@ -82,6 +94,8 @@ class TestPostmasterProcess(unittest.TestCase):
             self.assertIsNone(proc.wait_for_user_backends_to_close())
 
     @patch('subprocess.Popen')
+    @patch('os.setsid', Mock(), create=True)
+    @patch('multiprocessing.Process', MockProcess)
     @patch.object(PostmasterProcess, 'from_pid')
     @patch.object(PostmasterProcess, '_from_pidfile')
     def test_start(self, mock_frompidfile, mock_frompid, mock_popen):
diff --git a/tests/test_watchdog.py b/tests/test_watchdog.py
index 493e148d..e70213c5 100644
--- a/tests/test_watchdog.py
+++ b/tests/test_watchdog.py
@@ -2,6 +2,7 @@ import ctypes
 import patroni.watchdog.linux as linuxwd
 import sys
 import unittest
+import os
 
 from mock import patch, Mock, PropertyMock
 from patroni.watchdog import Watchdog, WatchdogError
@@ -61,6 +62,7 @@ def mock_close(fd):
     mock_devices[fd].open = False
 
 
+@unittest.skipIf(os.name == 'nt', "Windows not supported")
 @patch('os.open', mock_open)
 @patch('os.write', mock_write)
 @patch('os.close', mock_close)
@@ -174,6 +176,7 @@ class TestNullWatchdog(unittest.TestCase):
         self.assertIsInstance(NullWatchdog.from_config({}), NullWatchdog)
 
 
+@unittest.skipIf(os.name == 'nt', "Windows not supported")
 class TestLinuxWatchdogDevice(unittest.TestCase):
 
     def setUp(self):