diff --git a/source/extensions/stat_sinks/metrics_service/config.cc b/source/extensions/stat_sinks/metrics_service/config.cc
index 234b46b37740..22e9e58fad1f 100644
--- a/source/extensions/stat_sinks/metrics_service/config.cc
+++ b/source/extensions/stat_sinks/metrics_service/config.cc
@@ -29,7 +29,7 @@ Stats::SinkPtr MetricsServiceSinkFactory::createStatsSink(const Protobuf::Messag
               grpc_service, server.stats(), false),
           server.threadLocal(), server.localInfo());
 
-  return std::make_unique<MetricsServiceSink>(grpc_metrics_streamer);
+  return std::make_unique<MetricsServiceSink>(grpc_metrics_streamer, server.timeSource());
 }
 
 ProtobufTypes::MessagePtr MetricsServiceSinkFactory::createEmptyConfigProto() {
diff --git a/source/extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.cc b/source/extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.cc
index ce68afd5f98a..b218a57f1c74 100644
--- a/source/extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.cc
+++ b/source/extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.cc
@@ -61,15 +61,18 @@ void GrpcMetricsStreamerImpl::ThreadLocalStreamer::send(
   }
 }
 
-MetricsServiceSink::MetricsServiceSink(const GrpcMetricsStreamerSharedPtr& grpc_metrics_streamer)
-    : grpc_metrics_streamer_(grpc_metrics_streamer) {}
+MetricsServiceSink::MetricsServiceSink(const GrpcMetricsStreamerSharedPtr& grpc_metrics_streamer,
+                                       TimeSource& time_source)
+    : grpc_metrics_streamer_(grpc_metrics_streamer), time_source_(time_source) {}
 
 void MetricsServiceSink::flushCounter(const Stats::Counter& counter) {
   io::prometheus::client::MetricFamily* metrics_family = message_.add_envoy_metrics();
   metrics_family->set_type(io::prometheus::client::MetricType::COUNTER);
   metrics_family->set_name(counter.name());
   auto* metric = metrics_family->add_metric();
-  metric->set_timestamp_ms(std::chrono::system_clock::now().time_since_epoch().count());
+  metric->set_timestamp_ms(std::chrono::duration_cast<std::chrono::milliseconds>(
+                               time_source_.systemTime().time_since_epoch())
+                               .count());
   auto* counter_metric = metric->mutable_counter();
   counter_metric->set_value(counter.value());
 }
@@ -79,7 +82,9 @@ void MetricsServiceSink::flushGauge(const Stats::Gauge& gauge) {
   metrics_family->set_type(io::prometheus::client::MetricType::GAUGE);
   metrics_family->set_name(gauge.name());
   auto* metric = metrics_family->add_metric();
-  metric->set_timestamp_ms(std::chrono::system_clock::now().time_since_epoch().count());
+  metric->set_timestamp_ms(std::chrono::duration_cast<std::chrono::milliseconds>(
+                               time_source_.systemTime().time_since_epoch())
+                               .count());
   auto* gauage_metric = metric->mutable_gauge();
   gauage_metric->set_value(gauge.value());
 }
@@ -88,7 +93,9 @@ void MetricsServiceSink::flushHistogram(const Stats::ParentHistogram& histogram)
   metrics_family->set_type(io::prometheus::client::MetricType::SUMMARY);
   metrics_family->set_name(histogram.name());
   auto* metric = metrics_family->add_metric();
-  metric->set_timestamp_ms(std::chrono::system_clock::now().time_since_epoch().count());
+  metric->set_timestamp_ms(std::chrono::duration_cast<std::chrono::milliseconds>(
+                               time_source_.systemTime().time_since_epoch())
+                               .count());
   auto* summary_metric = metric->mutable_summary();
   const Stats::HistogramStatistics& hist_stats = histogram.intervalStatistics();
   for (size_t i = 0; i < hist_stats.supportedQuantiles().size(); i++) {
diff --git a/source/extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.h b/source/extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.h
index b27792652d78..bb796052a311 100644
--- a/source/extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.h
+++ b/source/extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.h
@@ -111,7 +111,8 @@ class GrpcMetricsStreamerImpl : public Singleton::Instance, public GrpcMetricsSt
 class MetricsServiceSink : public Stats::Sink {
 public:
   // MetricsService::Sink
-  MetricsServiceSink(const GrpcMetricsStreamerSharedPtr& grpc_metrics_streamer);
+  MetricsServiceSink(const GrpcMetricsStreamerSharedPtr& grpc_metrics_streamer,
+                     TimeSource& time_source);
   void flush(Stats::Source& source) override;
   void onHistogramComplete(const Stats::Histogram&, uint64_t) override {}
 
@@ -122,6 +123,7 @@ class MetricsServiceSink : public Stats::Sink {
 private:
   GrpcMetricsStreamerSharedPtr grpc_metrics_streamer_;
   envoy::service::metrics::v2::StreamMetricsMessage message_;
+  TimeSource& time_source_;
 };
 
 } // namespace MetricsService
diff --git a/test/extensions/stats_sinks/metrics_service/grpc_metrics_service_impl_test.cc b/test/extensions/stats_sinks/metrics_service/grpc_metrics_service_impl_test.cc
index f2996770d3a2..627eabf08dab 100644
--- a/test/extensions/stats_sinks/metrics_service/grpc_metrics_service_impl_test.cc
+++ b/test/extensions/stats_sinks/metrics_service/grpc_metrics_service_impl_test.cc
@@ -1,5 +1,6 @@
 #include "extensions/stat_sinks/metrics_service/grpc_metrics_service_impl.h"
 
+#include "test/mocks/common.h"
 #include "test/mocks/grpc/mocks.h"
 #include "test/mocks/local_info/mocks.h"
 #include "test/mocks/stats/mocks.h"
@@ -98,9 +99,10 @@ class MetricsServiceSinkTest : public testing::Test {};
 
 TEST(MetricsServiceSinkTest, CheckSendCall) {
   NiceMock<Stats::MockSource> source;
+  NiceMock<MockTimeSource> mock_time;
   std::shared_ptr<MockGrpcMetricsStreamer> streamer_{new MockGrpcMetricsStreamer()};
 
-  MetricsServiceSink sink(streamer_);
+  MetricsServiceSink sink(streamer_, mock_time);
 
   auto counter = std::make_shared<NiceMock<Stats::MockCounter>>();
   counter->name_ = "test_counter";
@@ -125,9 +127,10 @@ TEST(MetricsServiceSinkTest, CheckSendCall) {
 
 TEST(MetricsServiceSinkTest, CheckStatsCount) {
   NiceMock<Stats::MockSource> source;
+  NiceMock<MockTimeSource> mock_time;
   std::shared_ptr<TestGrpcMetricsStreamer> streamer_{new TestGrpcMetricsStreamer()};
 
-  MetricsServiceSink sink(streamer_);
+  MetricsServiceSink sink(streamer_, mock_time);
 
   auto counter = std::make_shared<NiceMock<Stats::MockCounter>>();
   counter->name_ = "test_counter";