diff --git a/src/Netclaw.Actors.Tests/Reminders/ReminderManagerActorTests.cs b/src/Netclaw.Actors.Tests/Reminders/ReminderManagerActorTests.cs
index 6618462c2..57beba5b3 100644
--- a/src/Netclaw.Actors.Tests/Reminders/ReminderManagerActorTests.cs
+++ b/src/Netclaw.Actors.Tests/Reminders/ReminderManagerActorTests.cs
@@ -855,7 +855,7 @@ public async Task Reconcile_disables_expired_recurring_reminders()
     public async Task Expired_reminder_disabled_on_fire_without_executing()
     {
         var manager = await GetManagerAsync();
-        var now = TimeProvider.System.GetUtcNow();
+        var now = _timeProvider.GetUtcNow();
 
         // Drain PreStart reconcile
         await manager.Ask<ReminderManagerActor.ReconcileCompleted>(