diff --git a/tests/test_date.py b/tests/test_date.py
index ce20a98b..fc318217 100644
--- a/tests/test_date.py
+++ b/tests/test_date.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import json
 import unittest
 import jc.parsers.date
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_dig.py b/tests/test_dig.py
index cca52ea8..8de41ea7 100644
--- a/tests/test_dig.py
+++ b/tests/test_dig.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import json
 import unittest
 import jc.parsers.dig
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_dir.py b/tests/test_dir.py
index fad28bcd..6fbcb62c 100644
--- a/tests/test_dir.py
+++ b/tests/test_dir.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import json
 import unittest
 import jc.parsers.dir
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_last.py b/tests/test_last.py
index e5f783d2..30b0d536 100644
--- a/tests/test_last.py
+++ b/tests/test_last.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import json
 import unittest
 import jc.parsers.last
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_ls.py b/tests/test_ls.py
index cb9c9280..13372bd5 100644
--- a/tests/test_ls.py
+++ b/tests/test_ls.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import json
 import unittest
 import jc.parsers.ls
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_rpm_qai.py b/tests/test_rpm_qai.py
index 799ca186..fa4a4463 100644
--- a/tests/test_rpm_qai.py
+++ b/tests/test_rpm_qai.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import unittest
 import json
 import jc.parsers.rpm_qi
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_stat.py b/tests/test_stat.py
index 212f9eec..9d4c84ac 100644
--- a/tests/test_stat.py
+++ b/tests/test_stat.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import json
 import unittest
 import jc.parsers.stat
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_systeminfo.py b/tests/test_systeminfo.py
index 7eccce88..64d3786a 100644
--- a/tests/test_systeminfo.py
+++ b/tests/test_systeminfo.py
@@ -1,10 +1,17 @@
 import json
 import os
+import sys
+import time
 import unittest
 import jc.parsers.systeminfo
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
     test_files = [
diff --git a/tests/test_upower.py b/tests/test_upower.py
index a6f0b619..a4f1b295 100644
--- a/tests/test_upower.py
+++ b/tests/test_upower.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import json
 import unittest
 import jc.parsers.upower
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 45aa738d..883d0361 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -1,6 +1,14 @@
+import os
+import sys
+import time
 import unittest
 import jc.utils
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):
 
diff --git a/tests/test_who.py b/tests/test_who.py
index 0366a98b..74357c5e 100644
--- a/tests/test_who.py
+++ b/tests/test_who.py
@@ -1,10 +1,17 @@
 import os
+import sys
+import time
 import json
 import unittest
 import jc.parsers.who
 
 THIS_DIR = os.path.dirname(os.path.abspath(__file__))
 
+# Set the timezone on POSIX systems. Need to manually set for Windows tests
+if not sys.platform.startswith('win32'):
+    os.environ['TZ'] = 'America/Los_Angeles'
+    time.tzset()
+
 
 class MyTests(unittest.TestCase):