diff --git a/rhodecode/__init__.py b/rhodecode/__init__.py
--- a/rhodecode/__init__.py
+++ b/rhodecode/__init__.py
@@ -46,6 +46,9 @@ __py_version__ = sys.version_info
 PLATFORM_WIN = ('Windows')
 PLATFORM_OTHERS = ('Linux', 'Darwin', 'FreeBSD', 'OpenBSD', 'SunOS')
 
+is_windows = __platform__ in PLATFORM_WIN
+is_unix = __platform__ in PLATFORM_OTHERS
+
 requirements = [
     "Pylons==1.0.0",
     "Beaker==1.6.3",
@@ -68,7 +71,7 @@ if __py_version__ < (2, 6):
     requirements.append("simplejson")
     requirements.append("pysqlite")
 
-if __platform__ in PLATFORM_WIN:
+if is_windows:
     requirements.append("mercurial>=2.2.1,<2.3")
 else:
     requirements.append("py-bcrypt")
diff --git a/rhodecode/tests/__init__.py b/rhodecode/tests/__init__.py
--- a/rhodecode/tests/__init__.py
+++ b/rhodecode/tests/__init__.py
@@ -21,13 +21,15 @@ from pylons import config, url
 from routes.util import URLGenerator
 from webtest import TestApp
 
+from rhodecode import is_windows
 from rhodecode.model.meta import Session
 from rhodecode.model.db import User
 
 import pylons.test
 
 os.environ['TZ'] = 'UTC'
-time.tzset()
+if not is_windows:
+    time.tzset()
 
 log = logging.getLogger(__name__)
 
@@ -71,6 +73,7 @@ NEW_GIT_REPO = 'vcs_test_git_new'
 HG_FORK = 'vcs_test_hg_fork'
 GIT_FORK = 'vcs_test_git_fork'
 
+
 class TestController(TestCase):
 
     def __init__(self, *args, **kwargs):