diff --git a/tests/test_array_agg.py b/tests/test_array_agg.py
index 7c47320..9034fa9 100644
--- a/tests/test_array_agg.py
+++ b/tests/test_array_agg.py
@@ -57,7 +57,7 @@ def test_aggregate_datetime(faker: Faker, db_vendor: str):
     kw = {}
     if db_vendor == "postgresql":
         # enforce tz for postgresql only - sqlite don't support it.
-        kw = dict(tzinfo=datetime.UTC)
+        kw = dict(tzinfo=datetime.timezone.utc)
 
     expected_value_per_author_name = post_factory(
         faker,
diff --git a/tests/test_obj_agg.py b/tests/test_obj_agg.py
index cf3b50d..5645210 100644
--- a/tests/test_obj_agg.py
+++ b/tests/test_obj_agg.py
@@ -58,7 +58,7 @@ def test_aggregate_datetime(faker: Faker, db_vendor: str):
     kw = {}
     if db_vendor == "postgresql":
         # enforce tz for postgresql only - sqlite don't support it.
-        kw = dict(tzinfo=datetime.UTC)
+        kw = dict(tzinfo=datetime.timezone.utc)
 
     expected_value_per_author_name = post_factory(
         faker,