diff --git a/rtc_base/task_utils/repeating_task_unittest.cc b/rtc_base/task_utils/repeating_task_unittest.cc
index 4cb6816..021c51e 100644
--- a/rtc_base/task_utils/repeating_task_unittest.cc
+++ b/rtc_base/task_utils/repeating_task_unittest.cc
@@ -195,7 +195,7 @@
 }
 
 TEST(RepeatingTaskTest, CompensatesForShortRunTime) {
-  SimulatedClock clock(Timestamp::Millis(0));
+  SimulatedClock clock(Timestamp::Zero());
   FakeTaskQueue task_queue(&clock);
   std::atomic_int counter(0);
   RepeatingTaskHandle::Start(
@@ -336,7 +336,7 @@
 TEST(RepeatingTaskTest, ClockIntegration) {
   absl::AnyInvocable<void() &&> delayed_task;
   TimeDelta expected_delay = TimeDelta::Zero();
-  SimulatedClock clock(Timestamp::Millis(0));
+  SimulatedClock clock(Timestamp::Zero());
 
   NiceMock<MockTaskQueue> task_queue;
   ON_CALL(task_queue, PostDelayedTask)