diff --git a/src/test/test_two_chainz.py b/src/test/test_two_chainz.py
index 0d028d1..91bad17 100644
--- a/src/test/test_two_chainz.py
+++ b/src/test/test_two_chainz.py
@@ -28,8 +28,8 @@ class TestApi:
     @pytest.mark.parametrize(
         "mocked_time,start_time,expected",
         [
-            (100, 50, 50),  # 100 - 50 = 50 seconds uptime
-            (200, 100, 100),  # 200 - 100 = 100 seconds uptime
+            (100, 50, "50"),  # 100 - 50 = 50 seconds uptime
+            (200, 100, "100"),  # 200 - 100 = 100 seconds uptime
         ],
     )
     def test_api_uptime_calculation(self, mocked_time, start_time, expected):