diff --git a/tests/integration/conftest.py b/tests/integration/conftest.py
index ac10bef12..3c56ae2a1 100644
--- a/tests/integration/conftest.py
+++ b/tests/integration/conftest.py
@@ -156,4 +156,5 @@ def setup_otel():
 @pytest.fixture(autouse=True)
 def set_timezone():
     os.environ["TZ"] = "UTC"
-    time.tzset()
+    if platform.system() != "Windows":
+        time.tzset()
diff --git a/tests/unit/conftest.py b/tests/unit/conftest.py
index 4ad7a0c29..54c8d80ec 100644
--- a/tests/unit/conftest.py
+++ b/tests/unit/conftest.py
@@ -1,4 +1,5 @@
 import logging
+import platform
 import urllib.request
 
 from unittest import mock
@@ -46,7 +47,8 @@ def test_confirm_connections_blocked():
 @pytest.fixture(autouse=True)
 def set_timezone():
     os.environ["TZ"] = "UTC"
-    time.tzset()
+    if platform.system() != "Windows":
+        time.tzset()
 
 
 @pytest.fixture(scope="session")