diff --git a/src/python_testing/TC_EEVSE_2_3.py b/src/python_testing/TC_EEVSE_2_3.py
index eb4e43d0b50105..54c5baa1a7ddff 100644
--- a/src/python_testing/TC_EEVSE_2_3.py
+++ b/src/python_testing/TC_EEVSE_2_3.py
@@ -194,8 +194,10 @@ def compute_expected_target_time_as_epoch_s(self, minutes_past_midnight):
             f"{int(minutes_past_midnight/60)}:{int(minutes_past_midnight%60)}"
             f" Expected target_time = {target_time}")
 
-        target_time_delta = target_time - \
-            datetime(2000, 1, 1, 0, 0, 0, 0).astimezone(timezone.utc)
+        matter_base_time = datetime(2000, 1, 1, 0, 0, 0, 0, tzinfo=timezone.utc)
+
+        target_time_delta = target_time - matter_base_time
+
         expected_target_time_epoch_s = int(target_time_delta.total_seconds())
         return expected_target_time_epoch_s