diff --git a/mitmproxy/test/tflow.py b/mitmproxy/test/tflow.py
index edf4d7a71..5749bd524 100644
--- a/mitmproxy/test/tflow.py
+++ b/mitmproxy/test/tflow.py
@@ -115,6 +115,26 @@ def tflow(client_conn=True, server_conn=True, req=True, resp=None, err=None):
     return f
 
 
+def tdummyflow(client_conn=True, server_conn=True, err=None):
+    class DummyFlow(flow.Flow):
+        """A flow that is neither HTTP nor TCP."""
+
+        def __init__(self, client_conn, server_conn, live=None):
+            super().__init__("dummy", client_conn, server_conn, live)
+
+    if client_conn is True:
+        client_conn = tclient_conn()
+    if server_conn is True:
+        server_conn = tserver_conn()
+    if err is True:
+        err = terr()
+
+    f = DummyFlow(client_conn, server_conn)
+    f.error = err
+    f.reply = controller.DummyReply()
+    return f
+
+
 def tclient_conn():
     """
     @return: mitmproxy.proxy.connection.ClientConnection
diff --git a/mitmproxy/test/tutils.py b/mitmproxy/test/tutils.py
index ae0ce2d86..477563151 100644
--- a/mitmproxy/test/tutils.py
+++ b/mitmproxy/test/tutils.py
@@ -11,12 +11,7 @@ from mitmproxy.net import tcp
 from mitmproxy.net import http
 
 
-def treader(bytes):
-    """
-        Construct a tcp.Read object from bytes.
-    """
-    fp = BytesIO(bytes)
-    return tcp.Reader(fp)
+test_data = data.Data(__name__).push("../../test/")
 
 
 @contextmanager
@@ -89,7 +84,12 @@ class RaisesContext:
         return True
 
 
-test_data = data.Data(__name__).push("../../test/")
+def treader(bytes):
+    """
+        Construct a tcp.Read object from bytes.
+    """
+    fp = BytesIO(bytes)
+    return tcp.Reader(fp)
 
 
 def treq(**kwargs):
diff --git a/test/conftest.py b/test/conftest.py
index 4d779b011..3f623c51c 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -9,6 +9,21 @@ requires_alpn = pytest.mark.skipif(
     not mitmproxy.net.tcp.HAS_ALPN,
     reason='requires OpenSSL with ALPN support')
 
+skip_windows = pytest.mark.skipif(
+    os.name == "nt",
+    reason='Skipping due to Windows'
+)
+
+skip_not_windows = pytest.mark.skipif(
+    os.name != "nt",
+    reason='Skipping due to not Windows'
+)
+
+skip_appveyor = pytest.mark.skipif(
+    "APPVEYOR" in os.environ,
+    reason='Skipping due to Appveyor'
+)
+
 
 @pytest.fixture()
 def disable_alpn(monkeypatch):
diff --git a/test/mitmproxy/addons/test_script.py b/test/mitmproxy/addons/test_script.py
index f578867d6..ad0c41c31 100644
--- a/test/mitmproxy/addons/test_script.py
+++ b/test/mitmproxy/addons/test_script.py
@@ -2,6 +2,7 @@ import traceback
 import sys
 import time
 import re
+import watchdog.events
 
 from mitmproxy.test import tflow
 from mitmproxy.test import tutils
@@ -11,12 +12,9 @@ from mitmproxy import options
 from mitmproxy import proxy
 from mitmproxy import master
 from mitmproxy import utils
-
 from mitmproxy.addons import script
 
-import watchdog.events
-
-from .. import tutils as ttutils
+from ...conftest import skip_not_windows
 
 
 def test_scriptenv():
@@ -84,7 +82,7 @@ class TestParseCommand:
                 "mitmproxy/data/addonscripts/recorder.py 'foo bar'"
             ) == ("mitmproxy/data/addonscripts/recorder.py", ["foo bar"])
 
-    @ttutils.skip_not_windows
+    @skip_not_windows
     def test_parse_windows(self):
         with utils.chdir(tutils.test_data.dirname):
             assert script.parse_command(
diff --git a/test/mitmproxy/console/test_common.py b/test/mitmproxy/console/test_common.py
index 49ce35b77..236ebb416 100644
--- a/test/mitmproxy/console/test_common.py
+++ b/test/mitmproxy/console/test_common.py
@@ -1,9 +1,10 @@
 from mitmproxy.test import tflow
 from mitmproxy.tools.console import common
-from .. import tutils
+
+from ...conftest import skip_appveyor
 
 
-@tutils.skip_appveyor
+@skip_appveyor
 def test_format_flow():
     f = tflow.tflow(resp=True)
     assert common.format_flow(f, True)
diff --git a/test/mitmproxy/console/test_help.py b/test/mitmproxy/console/test_help.py
index d34f3f5d6..86b842d8b 100644
--- a/test/mitmproxy/console/test_help.py
+++ b/test/mitmproxy/console/test_help.py
@@ -1,8 +1,9 @@
 import mitmproxy.tools.console.help as help
-from .. import tutils
+
+from ...conftest import skip_appveyor
 
 
-@tutils.skip_appveyor
+@skip_appveyor
 class TestHelp:
 
     def test_helptext(self):
diff --git a/test/mitmproxy/console/test_palettes.py b/test/mitmproxy/console/test_palettes.py
index 7490bae08..3892797d5 100644
--- a/test/mitmproxy/console/test_palettes.py
+++ b/test/mitmproxy/console/test_palettes.py
@@ -1,8 +1,9 @@
 import mitmproxy.tools.console.palettes as palettes
-from .. import tutils
+
+from ...conftest import skip_appveyor
 
 
-@tutils.skip_appveyor
+@skip_appveyor
 class TestPalette:
 
     def test_helptext(self):
diff --git a/test/mitmproxy/test_flowfilter.py b/test/mitmproxy/test_flowfilter.py
index 1fb971267..bfce265e0 100644
--- a/test/mitmproxy/test_flowfilter.py
+++ b/test/mitmproxy/test_flowfilter.py
@@ -4,7 +4,6 @@ from unittest.mock import patch
 from mitmproxy.test import tflow
 
 from mitmproxy import flowfilter
-from . import tutils as ttutils
 
 
 class TestParsing:
@@ -382,10 +381,10 @@ class TestMatchingTCPFlow:
 class TestMatchingDummyFlow:
 
     def flow(self):
-        return ttutils.tdummyflow()
+        return tflow.tdummyflow()
 
     def err(self):
-        return ttutils.tdummyflow(err=True)
+        return tflow.tdummyflow(err=True)
 
     def q(self, q, o):
         return flowfilter.parse(q)(o)
diff --git a/test/mitmproxy/test_proxy.py b/test/mitmproxy/test_proxy.py
index 6e0ef846c..ff1e2df07 100644
--- a/test/mitmproxy/test_proxy.py
+++ b/test/mitmproxy/test_proxy.py
@@ -15,8 +15,7 @@ from pathod import test
 from mitmproxy.net.http import http1
 from mitmproxy.test import tutils
 
-from . import tutils as ttutils
-
+from ..conftest import skip_windows
 
 class TestServerConnection:
 
@@ -149,7 +148,7 @@ class TestProcessProxyOptions:
 class TestProxyServer:
     # binding to 0.0.0.0:1 works without special permissions on Windows
 
-    @ttutils.skip_windows
+    @skip_windows
     def test_err(self):
         conf = ProxyConfig(
             options.Options(listen_port=1),
@@ -173,7 +172,7 @@ class TestDummyServer:
 
 class TestConnectionHandler:
 
-    def test_fatal_error(self):
+    def test_fatal_error(self, capsys):
         config = mock.Mock()
         root_layer = mock.Mock()
         root_layer.side_effect = RuntimeError
@@ -189,5 +188,7 @@ class TestConnectionHandler:
             config,
             channel
         )
-        with ttutils.capture_stderr(c.handle) as output:
-            assert "mitmproxy has crashed" in output
+        c.handle()
+
+        _, err = capsys.readouterr()
+        assert "mitmproxy has crashed" in err
diff --git a/test/mitmproxy/test_server.py b/test/mitmproxy/test_server.py
index 1388a4d84..f060b9918 100644
--- a/test/mitmproxy/test_server.py
+++ b/test/mitmproxy/test_server.py
@@ -21,9 +21,9 @@ from mitmproxy.net.tcp import Address
 from pathod import pathoc
 from pathod import pathod
 
-from . import tutils as ttutils
-
 from . import tservers
+from ..conftest import skip_appveyor
+
 
 """
     Note that the choice of response code in these tests matters more than you
@@ -611,7 +611,7 @@ class TestProxy(tservers.HTTPProxyTest):
         assert "host" in f.request.headers
         assert f.response.status_code == 304
 
-    @ttutils.skip_appveyor
+    @skip_appveyor
     def test_response_timestamps(self):
         # test that we notice at least 1 sec delay between timestamps
         # in response object
@@ -622,7 +622,7 @@ class TestProxy(tservers.HTTPProxyTest):
         # timestamp_start might fire a bit late, so we play safe and only require 300ms.
         assert 0.3 <= response.timestamp_end - response.timestamp_start
 
-    @ttutils.skip_appveyor
+    @skip_appveyor
     def test_request_timestamps(self):
         # test that we notice a delay between timestamps in request object
         connection = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
diff --git a/test/mitmproxy/tutils.py b/test/mitmproxy/tutils.py
deleted file mode 100644
index 35e3295dc..000000000
--- a/test/mitmproxy/tutils.py
+++ /dev/null
@@ -1,68 +0,0 @@
-import sys
-from contextlib import contextmanager
-from unittest.case import SkipTest
-
-import io
-import mitmproxy.test.tutils
-import os
-from mitmproxy import controller
-from mitmproxy import flow
-import mitmproxy.test.tflow
-
-
-def _skip_windows(*args):
-    raise SkipTest("Skipped on Windows.")
-
-
-def skip_windows(fn):
-    if os.name == "nt":
-        return _skip_windows
-    else:
-        return fn
-
-
-def skip_not_windows(fn):
-    if os.name == "nt":
-        return fn
-    else:
-        return _skip_windows
-
-
-def _skip_appveyor(*args):
-    raise SkipTest("Skipped on AppVeyor.")
-
-
-def skip_appveyor(fn):
-    if "APPVEYOR" in os.environ:
-        return _skip_appveyor
-    else:
-        return fn
-
-
-class DummyFlow(flow.Flow):
-    """A flow that is neither HTTP nor TCP."""
-
-    def __init__(self, client_conn, server_conn, live=None):
-        super().__init__("dummy", client_conn, server_conn, live)
-
-
-def tdummyflow(client_conn=True, server_conn=True, err=None):
-    if client_conn is True:
-        client_conn = mitmproxy.test.tflow.tclient_conn()
-    if server_conn is True:
-        server_conn = mitmproxy.test.tflow.tserver_conn()
-    if err is True:
-        err = mitmproxy.test.tflow.terr()
-
-    f = DummyFlow(client_conn, server_conn)
-    f.error = err
-    f.reply = controller.DummyReply()
-    return f
-
-
-@contextmanager
-def capture_stderr(command, *args, **kwargs):
-    out, sys.stderr = sys.stderr, io.StringIO()
-    command(*args, **kwargs)
-    yield sys.stderr.getvalue()
-    sys.stderr = out