diff --git a/tests/parsers/apt_history.py b/tests/parsers/apt_history.py
index 8c8ba3a437..d6428cc28a 100644
--- a/tests/parsers/apt_history.py
+++ b/tests/parsers/apt_history.py
@@ -217,6 +217,21 @@ def testParseLog(self):
     self._TestGetMessageStrings(
         event_data, expected_message, expected_short_message)
 
+  def testParseLogWithTimeZone(self):
+    """Tests the Parse function on apt_history.log with a time zone."""
+    parser = apt_history.APTHistoryLogParser()
+    storage_writer = self._ParseFile(
+        ['apt_history.log'], parser, timezone='CET')
+
+    self.assertEqual(storage_writer.number_of_warnings, 0)
+    self.assertEqual(storage_writer.number_of_events, 10)
+
+    events = list(storage_writer.GetEvents())
+
+    event = events[0]
+
+    self.CheckTimestamp(event.timestamp, '2019-07-10 14:38:08.000000')
+
   def testParseInvalidLog(self):
     """Tests the Parse function on a non APT History log."""
     parser = apt_history.APTHistoryLogParser()
diff --git a/tests/parsers/setupapi.py b/tests/parsers/setupapi.py
index 3b6dbf3662..f1a9ac258e 100644
--- a/tests/parsers/setupapi.py
+++ b/tests/parsers/setupapi.py
@@ -132,6 +132,21 @@ def testParseSetupLog(self):
     self._TestGetMessageStrings(
         event_data, expected_message, expected_short_message)
 
+  def testParseSetupLogWithTimeZone(self):
+    """Tests the Parse function on setupapi.setup.log with a time zone."""
+    parser = setupapi.SetupapiLogParser()
+    storage_writer = self._ParseFile(
+        ['setupapi.setup.log'], parser, timezone='CET')
+
+    self.assertEqual(storage_writer.number_of_warnings, 0)
+    self.assertEqual(storage_writer.number_of_events, 32)
+
+    events = list(storage_writer.GetEvents())
+
+    event = events[0]
+
+    self.CheckTimestamp(event.timestamp, '2015-11-22 16:53:16.599000')
+
 
 if __name__ == '__main__':
   unittest.main()
diff --git a/tests/parsers/sophos_av.py b/tests/parsers/sophos_av.py
index 581fb0e992..9ce5af34c3 100644
--- a/tests/parsers/sophos_av.py
+++ b/tests/parsers/sophos_av.py
@@ -37,6 +37,20 @@ def testParse(self):
     self._TestGetMessageStrings(
         event_data, expected_message, expected_short_message)
 
+  def testParseWithTimeZone(self):
+    """Tests the Parse function with a time zone."""
+    parser = sophos_av.SophosAVLogParser()
+    storage_writer = self._ParseFile(['sav.txt'], parser, timezone='CET')
+
+    self.assertEqual(storage_writer.number_of_warnings, 0)
+    self.assertEqual(storage_writer.number_of_events, 9)
+
+    events = list(storage_writer.GetEvents())
+
+    event = events[0]
+
+    self.CheckTimestamp(event.timestamp, '2010-07-20 16:38:14.000000')
+
 
 if __name__ == '__main__':
   unittest.main()
diff --git a/tests/parsers/syslog.py b/tests/parsers/syslog.py
index c304592c28..216d4a7d2d 100644
--- a/tests/parsers/syslog.py
+++ b/tests/parsers/syslog.py
@@ -36,6 +36,18 @@ def testParseRsyslogTraditional(self):
     self.assertEqual(storage_writer.number_of_warnings, 0)
     self.assertEqual(storage_writer.number_of_events, 8)
 
+    events = list(storage_writer.GetSortedEvents())
+
+    event = events[0]
+
+    self.CheckTimestamp(event.timestamp, '2016-01-22 07:54:32.000000')
+
+    event_data = self._GetEventDataOfEvent(storage_writer, event)
+    self.assertEqual(event_data.data_type, 'syslog:line')
+    self.assertEqual(event_data.hostname, 'myhostname.myhost.com')
+    self.assertEqual(event_data.reporter, 'Job')
+    self.assertIsNone(event_data.severity)
+
   def testParseDarwin(self):
     """Tests the Parse function on an Darwin-style syslog file."""
     parser = syslog.SyslogParser()
@@ -203,6 +215,29 @@ def testParse(self):
     self.assertEqual(storage_writer.number_of_warnings, 2)
     self.assertEqual(storage_writer.number_of_events, 15)
 
+  def testParseWithTimeZone(self):
+    """Tests the Parse function with a time zone."""
+    parser = syslog.SyslogParser()
+    knowledge_base_values = {'year': 2016}
+    storage_writer = self._ParseFile(
+        ['syslog_rsyslog_traditional'], parser,
+        knowledge_base_values=knowledge_base_values, timezone='CET')
+
+    self.assertEqual(storage_writer.number_of_warnings, 0)
+    self.assertEqual(storage_writer.number_of_events, 8)
+
+    events = list(storage_writer.GetSortedEvents())
+
+    event = events[0]
+
+    self.CheckTimestamp(event.timestamp, '2016-01-22 06:54:32.000000')
+
+    event_data = self._GetEventDataOfEvent(storage_writer, event)
+    self.assertEqual(event_data.data_type, 'syslog:line')
+    self.assertEqual(event_data.hostname, 'myhostname.myhost.com')
+    self.assertEqual(event_data.reporter, 'Job')
+    self.assertIsNone(event_data.severity)
+
 
 if __name__ == '__main__':
   unittest.main()
diff --git a/tests/parsers/vsftpd.py b/tests/parsers/vsftpd.py
index a633b8ca21..5690501c38 100644
--- a/tests/parsers/vsftpd.py
+++ b/tests/parsers/vsftpd.py
@@ -39,6 +39,20 @@ def testParse(self):
     self._TestGetMessageStrings(
         event_data, expected_message, expected_short_message)
 
+  def testParseWithTimeZone(self):
+    """Tests the Parse function with a time zone."""
+    parser = vsftpd.VsftpdLogParser()
+    storage_writer = self._ParseFile(['vsftpd.log'], parser, timezone='CET')
+
+    self.assertEqual(storage_writer.number_of_warnings, 0)
+    self.assertEqual(storage_writer.number_of_events, 25)
+
+    events = list(storage_writer.GetEvents())
+
+    event = events[12]
+
+    self.CheckTimestamp(event.timestamp, '2016-06-10 12:24:19.000000')
+
 
 if __name__ == '__main__':
   unittest.main()
diff --git a/tests/parsers/winfirewall.py b/tests/parsers/winfirewall.py
index b69b32dfe4..f73b3bf874 100644
--- a/tests/parsers/winfirewall.py
+++ b/tests/parsers/winfirewall.py
@@ -61,6 +61,20 @@ def testParse(self):
     self.assertEqual(event_data.icmp_type, 8)
     self.assertEqual(event_data.icmp_code, 0)
 
+  def testParseWithTimeZone(self):
+    """Tests the Parse function with a time zone."""
+    parser = winfirewall.WinFirewallParser()
+    storage_writer = self._ParseFile(['firewall.log'], parser, timezone='CET')
+
+    self.assertEqual(storage_writer.number_of_warnings, 0)
+    self.assertEqual(storage_writer.number_of_events, 15)
+
+    events = list(storage_writer.GetSortedEvents())
+
+    event = events[4]
+
+    self.CheckTimestamp(event.timestamp, '2005-04-11 06:06:02.000000')
+
 
 if __name__ == '__main__':
   unittest.main()
diff --git a/tests/parsers/xchatlog.py b/tests/parsers/xchatlog.py
index c2bb7bc11b..e67a782441 100644
--- a/tests/parsers/xchatlog.py
+++ b/tests/parsers/xchatlog.py
@@ -17,6 +17,22 @@ class XChatLogUnitTest(test_lib.ParserTestCase):
   def testParse(self):
     """Tests the Parse function."""
     parser = xchatlog.XChatLogParser()
+    storage_writer = self._ParseFile(['xchat.log'], parser)
+
+    self.assertEqual(storage_writer.number_of_warnings, 1)
+    self.assertEqual(storage_writer.number_of_events, 9)
+
+    events = list(storage_writer.GetEvents())
+
+    expected_event_values = {
+        'text': 'XChat start logging',
+        'timestamp': '2011-12-31 21:11:55.000000'}
+
+    self.CheckEventValues(storage_writer, events[0], expected_event_values)
+
+  def testParseWithTimeZone(self):
+    """Tests the Parse function with a time zone."""
+    parser = xchatlog.XChatLogParser()
     storage_writer = self._ParseFile(
         ['xchat.log'], parser, timezone='Europe/Rome')