diff --git a/kallithea/tests/base.py b/kallithea/tests/base.py
--- a/kallithea/tests/base.py
+++ b/kallithea/tests/base.py
@@ -23,14 +23,11 @@ import time
 from tg import config
 from webtest import TestApp
 
-from kallithea import is_windows, model
+from kallithea import model
 from kallithea.model.db import Notification, User, UserNotification
 from kallithea.model.meta import Session
 from kallithea.lib.utils2 import safe_str
 
-os.environ['TZ'] = 'UTC'
-if not is_windows:
-    time.tzset()
 
 log = logging.getLogger(__name__)
 
diff --git a/kallithea/tests/conftest.py b/kallithea/tests/conftest.py
--- a/kallithea/tests/conftest.py
+++ b/kallithea/tests/conftest.py
@@ -2,6 +2,7 @@ import os
 import sys
 import logging
 import pkg_resources
+import time
 
 from paste.deploy import loadwsgi
 from routes.util import URLGenerator
@@ -21,6 +22,10 @@ import kallithea.tests.base # FIXME: nee
 from tg.util.webtest import test_context
 
 def pytest_configure():
+    os.environ['TZ'] = 'UTC'
+    if not kallithea.is_windows:
+        time.tzset()
+
     path = os.getcwd()
     sys.path.insert(0, path)
     pkg_resources.working_set.add_entry(path)