diff --git a/src/test_target_2/constants.py b/src/test_target_2/constants.py
index 4bc913e..ef1396c 100644
--- a/src/test_target_2/constants.py
+++ b/src/test_target_2/constants.py
@@ -5,3 +5,4 @@
 DEFAULT_LANGUAGE: str = "en"
 DEFAULT_REGION: str = "us"
 DEFAULT_CURRENCY: str = "usd"
+DEFAULT_TIMEZONE: str = "utc"
diff --git a/tests/test_constants.py b/tests/test_constants.py
index bf4d1db..99afbe2 100644
--- a/tests/test_constants.py
+++ b/tests/test_constants.py
@@ -51,3 +51,11 @@ def test_default_currency_value() -> None:
 
 def test_default_currency_type() -> None:
     assert isinstance(constants.DEFAULT_CURRENCY, str)
+
+
+def test_default_timezone_value() -> None:
+    assert constants.DEFAULT_TIMEZONE == "utc"
+
+
+def test_default_timezone_type() -> None:
+    assert isinstance(constants.DEFAULT_TIMEZONE, str)