diff --git a/audio/audio_send_stream_unittest.cc b/audio/audio_send_stream_unittest.cc
index e20b031079..21f22185a5 100644
--- a/audio/audio_send_stream_unittest.cc
+++ b/audio/audio_send_stream_unittest.cc
@@ -28,6 +28,7 @@
 #include "modules/rtp_rtcp/mocks/mock_rtcp_rtt_stats.h"
 #include "modules/rtp_rtcp/mocks/mock_rtp_rtcp.h"
 #include "rtc_base/task_queue.h"
+#include "system_wrappers/include/clock.h"
 #include "test/field_trial.h"
 #include "test/gtest.h"
 #include "test/mock_audio_encoder.h"
@@ -125,9 +126,10 @@ rtc::scoped_refptr<MockAudioEncoderFactory> SetupEncoderFactoryMock() {
 
 struct ConfigHelper {
   ConfigHelper(bool audio_bwe_enabled, bool expect_set_encoder_call)
-      : stream_config_(/*send_transport=*/nullptr, /*media_transport=*/nullptr),
+      : clock_(1000000),
+        stream_config_(/*send_transport=*/nullptr, /*media_transport=*/nullptr),
         audio_processing_(new rtc::RefCountedObject<MockAudioProcessing>()),
-        bitrate_allocator_(&limit_observer_),
+        bitrate_allocator_(&clock_, &limit_observer_),
         worker_queue_("ConfigHelper_worker_queue"),
         audio_encoder_(nullptr) {
     using testing::Invoke;
@@ -283,6 +285,7 @@ struct ConfigHelper {
   }
 
  private:
+  SimulatedClock clock_;
   rtc::scoped_refptr<AudioState> audio_state_;
   AudioSendStream::Config stream_config_;
   testing::StrictMock<MockChannelSend>* channel_send_ = nullptr;
diff --git a/call/bitrate_allocator.cc b/call/bitrate_allocator.cc
index 21939a7e47..9ddc78653a 100644
--- a/call/bitrate_allocator.cc
+++ b/call/bitrate_allocator.cc
@@ -51,7 +51,7 @@ double MediaRatio(uint32_t allocated_bitrate, uint32_t protection_bitrate) {
 
 }  // namespace
 
-BitrateAllocator::BitrateAllocator(LimitObserver* limit_observer)
+BitrateAllocator::BitrateAllocator(Clock* clock, LimitObserver* limit_observer)
     : limit_observer_(limit_observer),
       last_target_bps_(0),
       last_link_capacity_bps_(0),
@@ -60,7 +60,7 @@ BitrateAllocator::BitrateAllocator(LimitObserver* limit_observer)
       last_rtt_(0),
       last_bwe_period_ms_(1000),
       num_pause_events_(0),
-      clock_(Clock::GetRealTimeClock()),
+      clock_(clock),
       last_bwe_log_time_(0),
       total_requested_padding_bitrate_(0),
       total_requested_min_bitrate_(0),
diff --git a/call/bitrate_allocator.h b/call/bitrate_allocator.h
index 43e89b2936..bb2d149c80 100644
--- a/call/bitrate_allocator.h
+++ b/call/bitrate_allocator.h
@@ -90,7 +90,7 @@ class BitrateAllocator : public BitrateAllocatorInterface {
     virtual ~LimitObserver() = default;
   };
 
-  explicit BitrateAllocator(LimitObserver* limit_observer);
+  BitrateAllocator(Clock* clock, LimitObserver* limit_observer);
   ~BitrateAllocator() override;
 
   void UpdateStartRate(uint32_t start_rate_bps);
diff --git a/call/bitrate_allocator_unittest.cc b/call/bitrate_allocator_unittest.cc
index 33747efb34..4441326db9 100644
--- a/call/bitrate_allocator_unittest.cc
+++ b/call/bitrate_allocator_unittest.cc
@@ -87,7 +87,8 @@ const double kDefaultBitratePriority = 1.0;
 class BitrateAllocatorTest : public ::testing::Test {
  protected:
   BitrateAllocatorTest()
-      : allocator_(new BitrateAllocatorForTest(&limit_observer_)) {
+      : allocator_(new BitrateAllocatorForTest(Clock::GetRealTimeClock(),
+                                               &limit_observer_)) {
     allocator_->OnNetworkChanged(300000u, 0, 0, kDefaultProbingIntervalMs);
   }
   ~BitrateAllocatorTest() {}
@@ -267,7 +268,8 @@ TEST_F(BitrateAllocatorTest, RemoveObserverTriggersLimitObserver) {
 class BitrateAllocatorTestNoEnforceMin : public ::testing::Test {
  protected:
   BitrateAllocatorTestNoEnforceMin()
-      : allocator_(new BitrateAllocatorForTest(&limit_observer_)) {
+      : allocator_(new BitrateAllocatorForTest(Clock::GetRealTimeClock(),
+                                               &limit_observer_)) {
     allocator_->OnNetworkChanged(300000u, 0, 0, kDefaultProbingIntervalMs);
   }
   ~BitrateAllocatorTestNoEnforceMin() {}
diff --git a/call/call.cc b/call/call.cc
index 08a23e2bae..85a9c5c6a7 100644
--- a/call/call.cc
+++ b/call/call.cc
@@ -454,7 +454,7 @@ Call::Call(const Call::Config& config,
       num_cpu_cores_(CpuInfo::DetectNumberOfCores()),
       module_process_thread_(std::move(module_process_thread)),
       call_stats_(new CallStats(clock_, module_process_thread_.get())),
-      bitrate_allocator_(new BitrateAllocator(this)),
+      bitrate_allocator_(new BitrateAllocator(clock_, this)),
       config_(config),
       audio_network_state_(kNetworkDown),
       video_network_state_(kNetworkDown),