diff --git a/sshuttle/tests/test_helpers.py b/sshuttle/tests/test_helpers.py
new file mode 100644
index 0000000..aa765ce
--- /dev/null
+++ b/sshuttle/tests/test_helpers.py
@@ -0,0 +1,165 @@
+from mock import patch, call
+import io
+import socket
+
+import sshuttle.helpers
+
+
+@patch('sshuttle.helpers.logprefix', new='prefix: ')
+@patch('sshuttle.helpers.sys.stdout')
+@patch('sshuttle.helpers.sys.stderr')
+def test_log(mock_stderr, mock_stdout):
+    sshuttle.helpers.log("message")
+    assert mock_stdout.mock_calls == [
+        call.flush(),
+    ]
+    assert mock_stderr.mock_calls == [
+        call.write('prefix: message'),
+        call.flush(),
+    ]
+
+
+@patch('sshuttle.helpers.logprefix', new='prefix: ')
+@patch('sshuttle.helpers.verbose', new=1)
+@patch('sshuttle.helpers.sys.stdout')
+@patch('sshuttle.helpers.sys.stderr')
+def test_debug1(mock_stderr, mock_stdout):
+    sshuttle.helpers.debug1("message")
+    assert mock_stdout.mock_calls == [
+        call.flush(),
+    ]
+    assert mock_stderr.mock_calls == [
+        call.write('prefix: message'),
+        call.flush(),
+    ]
+
+
+@patch('sshuttle.helpers.logprefix', new='prefix: ')
+@patch('sshuttle.helpers.verbose', new=0)
+@patch('sshuttle.helpers.sys.stdout')
+@patch('sshuttle.helpers.sys.stderr')
+def test_debug1_nop(mock_stderr, mock_stdout):
+    sshuttle.helpers.debug1("message")
+    assert mock_stdout.mock_calls == []
+    assert mock_stderr.mock_calls == []
+
+
+@patch('sshuttle.helpers.logprefix', new='prefix: ')
+@patch('sshuttle.helpers.verbose', new=2)
+@patch('sshuttle.helpers.sys.stdout')
+@patch('sshuttle.helpers.sys.stderr')
+def test_debug2(mock_stderr, mock_stdout):
+    sshuttle.helpers.debug2("message")
+    assert mock_stdout.mock_calls == [
+        call.flush(),
+    ]
+    assert mock_stderr.mock_calls == [
+        call.write('prefix: message'),
+        call.flush(),
+    ]
+
+
+@patch('sshuttle.helpers.logprefix', new='prefix: ')
+@patch('sshuttle.helpers.verbose', new=1)
+@patch('sshuttle.helpers.sys.stdout')
+@patch('sshuttle.helpers.sys.stderr')
+def test_debug2_nop(mock_stderr, mock_stdout):
+    sshuttle.helpers.debug2("message")
+    assert mock_stdout.mock_calls == []
+    assert mock_stderr.mock_calls == []
+
+
+@patch('sshuttle.helpers.logprefix', new='prefix: ')
+@patch('sshuttle.helpers.verbose', new=3)
+@patch('sshuttle.helpers.sys.stdout')
+@patch('sshuttle.helpers.sys.stderr')
+def test_debug3(mock_stderr, mock_stdout):
+    sshuttle.helpers.debug3("message")
+    assert mock_stdout.mock_calls == [
+        call.flush(),
+    ]
+    assert mock_stderr.mock_calls == [
+        call.write('prefix: message'),
+        call.flush(),
+    ]
+
+
+@patch('sshuttle.helpers.logprefix', new='prefix: ')
+@patch('sshuttle.helpers.verbose', new=2)
+@patch('sshuttle.helpers.sys.stdout')
+@patch('sshuttle.helpers.sys.stderr')
+def test_debug3_nop(mock_stderr, mock_stdout):
+    sshuttle.helpers.debug3("message")
+    assert mock_stdout.mock_calls == []
+    assert mock_stderr.mock_calls == []
+
+
+@patch('sshuttle.helpers.open', create=True)
+def test_resolvconf_nameservers(mock_open):
+    mock_open.return_value = io.StringIO(u"""
+# Generated by NetworkManager
+search pri
+nameserver 192.168.1.1
+nameserver 192.168.2.1
+nameserver 192.168.3.1
+nameserver 192.168.4.1
+nameserver 2404:6800:4004:80c::1
+nameserver 2404:6800:4004:80c::2
+nameserver 2404:6800:4004:80c::3
+nameserver 2404:6800:4004:80c::4
+""")
+
+    ns = sshuttle.helpers.resolvconf_nameservers()
+    assert ns == [
+        (2, u'192.168.1.1'), (2, u'192.168.2.1'),
+        (2, u'192.168.3.1'), (2, u'192.168.4.1'),
+        (10, u'2404:6800:4004:80c::1'), (10, u'2404:6800:4004:80c::2'),
+        (10, u'2404:6800:4004:80c::3'), (10, u'2404:6800:4004:80c::4')
+    ]
+
+
+@patch('sshuttle.helpers.open', create=True)
+def test_resolvconf_random_nameserver(mock_open):
+    mock_open.return_value = io.StringIO(u"""
+# Generated by NetworkManager
+search pri
+nameserver 192.168.1.1
+nameserver 192.168.2.1
+nameserver 192.168.3.1
+nameserver 192.168.4.1
+nameserver 2404:6800:4004:80c::1
+nameserver 2404:6800:4004:80c::2
+nameserver 2404:6800:4004:80c::3
+nameserver 2404:6800:4004:80c::4
+""")
+    ns = sshuttle.helpers.resolvconf_random_nameserver()
+    assert ns in [
+        (2, u'192.168.1.1'), (2, u'192.168.2.1'),
+        (2, u'192.168.3.1'), (2, u'192.168.4.1'),
+        (10, u'2404:6800:4004:80c::1'), (10, u'2404:6800:4004:80c::2'),
+        (10, u'2404:6800:4004:80c::3'), (10, u'2404:6800:4004:80c::4')
+    ]
+
+
+def test_islocal():
+    assert sshuttle.helpers.islocal("127.0.0.1", socket.AF_INET)
+    assert not sshuttle.helpers.islocal("192.0.2.1", socket.AF_INET)
+    assert sshuttle.helpers.islocal("::1", socket.AF_INET6)
+    assert not sshuttle.helpers.islocal("2001:db8::1", socket.AF_INET6)
+
+
+def test_family_ip_tuple():
+    assert sshuttle.helpers.family_ip_tuple("127.0.0.1") \
+        == (socket.AF_INET, "127.0.0.1")
+    assert sshuttle.helpers.family_ip_tuple("192.168.2.6") \
+        == (socket.AF_INET, "192.168.2.6")
+    assert sshuttle.helpers.family_ip_tuple("::1") \
+        == (socket.AF_INET6, "::1")
+    assert sshuttle.helpers.family_ip_tuple("2404:6800:4004:80c::1") \
+        == (socket.AF_INET6, "2404:6800:4004:80c::1")
+
+
+def test_family_to_string():
+    assert sshuttle.helpers.family_to_string(socket.AF_INET) == "AF_INET"
+    assert sshuttle.helpers.family_to_string(socket.AF_INET6) == "AF_INET6"
+    assert sshuttle.helpers.family_to_string(socket.AF_UNIX) == "1"