diff --git a/src/test_target_2/constants.py b/src/test_target_2/constants.py
index e58b8bd..4bc913e 100644
--- a/src/test_target_2/constants.py
+++ b/src/test_target_2/constants.py
@@ -4,3 +4,4 @@
 DEFAULT_FAREWELL: str = "goodbye"
 DEFAULT_LANGUAGE: str = "en"
 DEFAULT_REGION: str = "us"
+DEFAULT_CURRENCY: str = "usd"
diff --git a/tests/test_constants.py b/tests/test_constants.py
index cd94294..bf4d1db 100644
--- a/tests/test_constants.py
+++ b/tests/test_constants.py
@@ -43,3 +43,11 @@ def test_default_region_value() -> None:
 
 def test_default_region_type() -> None:
     assert isinstance(constants.DEFAULT_REGION, str)
+
+
+def test_default_currency_value() -> None:
+    assert constants.DEFAULT_CURRENCY == "usd"
+
+
+def test_default_currency_type() -> None:
+    assert isinstance(constants.DEFAULT_CURRENCY, str)