diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..5612ba3
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,8 @@
+import sys
+
+from pyopensky.tzdata import download_tzdata_windows
+
+
+def pytest_configure(config) -> None:  # type: ignore
+    if sys.platform == "win32":
+        download_tzdata_windows(year=2022)