diff --git a/tests/manager/api/controller/test_playtime_entries.py b/tests/manager/api/controller/test_playtime_entries.py
index 250bdd5f8..e13278d76 100644
--- a/tests/manager/api/controller/test_playtime_entries.py
+++ b/tests/manager/api/controller/test_playtime_entries.py
@@ -3,7 +3,6 @@
 from unittest.mock import patch
 
 import flask
-from isodate import parse_datetime
 from sqlalchemy.exc import IntegrityError
 
 from palace.manager.api.controller.playtime_entries import (
@@ -42,7 +41,7 @@ def test_track_playtime(self, circulation_fixture: CirculationControllerFixture)
         patron = db.patron()
 
         loan_exists_date_str = date_string(hour=12, minute=0)
-        inscope_loan_start = parse_datetime(loan_exists_date_str)
+        inscope_loan_start = datetime.datetime.fromisoformat(loan_exists_date_str)
         inscope_loan_end = inscope_loan_start + datetime.timedelta(days=14)
 
         loan, _ = pool.loan_to(