diff --git a/tests/test_main.py b/tests/test_main.py
index 6aed064..c39f53f 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -623,3 +623,27 @@ class BaseTestCase(utils.TestCase):
 
             headers = self.patched['wakatime.packages.requests.adapters.HTTPAdapter.send'].call_args[0][0].headers
             self.assertEquals(headers.get('TimeZone'), u(timezone.zone).encode('utf-8') if is_py3 else timezone.zone)
+
+    def test_timezone_header(self):
+        response = Response()
+        response.status_code = 201
+        self.patched['wakatime.packages.requests.adapters.HTTPAdapter.send'].return_value = response
+
+        entity = 'tests/samples/codefiles/emptyfile.txt'
+        config = 'tests/samples/configs/good_config.cfg'
+        args = ['--file', entity, '--config', config]
+        retval = execute(args)
+        self.assertEquals(retval, SUCCESS)
+        self.assertEquals(sys.stdout.getvalue(), '')
+        self.assertEquals(sys.stderr.getvalue(), '')
+
+        self.patched['wakatime.session_cache.SessionCache.get'].assert_called_once_with()
+        self.patched['wakatime.session_cache.SessionCache.delete'].assert_not_called()
+        self.patched['wakatime.session_cache.SessionCache.save'].assert_called_once_with(ANY)
+
+        self.patched['wakatime.offlinequeue.Queue.push'].assert_not_called()
+        self.patched['wakatime.offlinequeue.Queue.pop'].assert_called_once_with()
+
+        timezone = tzlocal.get_localzone()
+        headers = self.patched['wakatime.packages.requests.adapters.HTTPAdapter.send'].call_args[0][0].headers
+        self.assertEquals(headers.get('TimeZone'), u(timezone.zone).encode('utf-8') if is_py3 else timezone.zone)