diff --git a/testing/AbsoluteMouseReport.cpp b/testing/AbsoluteMouseReport.cpp
index 749dcf37..0c1303af 100644
--- a/testing/AbsoluteMouseReport.cpp
+++ b/testing/AbsoluteMouseReport.cpp
@@ -16,6 +16,9 @@
 
 #include "testing/AbsoluteMouseReport.h"
 
+#include "Kaleidoscope.h"
+#include "testing/fix-macros.h"
+
 #include <cstring>
 
 #include "MouseButtons.h"
@@ -27,6 +30,11 @@ AbsoluteMouseReport::AbsoluteMouseReport(const void* data) {
   const ReportData& report_data =
     *static_cast<const ReportData*>(data);
   memcpy(&report_data_, &report_data, sizeof(report_data_));
+  timestamp_ = Runtime.millisAtCycleStart();
+}
+
+uint32_t AbsoluteMouseReport::Timestamp() const {
+  return timestamp_;
 }
 
 std::vector<uint8_t> AbsoluteMouseReport::Buttons() const {
diff --git a/testing/AbsoluteMouseReport.h b/testing/AbsoluteMouseReport.h
index 6b73c00f..71666ad8 100644
--- a/testing/AbsoluteMouseReport.h
+++ b/testing/AbsoluteMouseReport.h
@@ -33,12 +33,14 @@ class AbsoluteMouseReport {
 
   AbsoluteMouseReport(const void* data);
 
+  uint32_t Timestamp() const;
   std::vector<uint8_t> Buttons() const;
   uint16_t XAxis() const;
   uint16_t YAxis() const;
   int8_t Wheel() const;
 
  private:
+  uint32_t timestamp_;
   ReportData report_data_;
 };
 
diff --git a/testing/ConsumerControlReport.cpp b/testing/ConsumerControlReport.cpp
index 70abb990..ca2e0220 100644
--- a/testing/ConsumerControlReport.cpp
+++ b/testing/ConsumerControlReport.cpp
@@ -16,6 +16,9 @@
 
 #include "testing/ConsumerControlReport.h"
 
+#include "Kaleidoscope.h"
+#include "testing/fix-macros.h"
+
 #include <cstring>
 
 namespace kaleidoscope {
@@ -25,6 +28,11 @@ ConsumerControlReport::ConsumerControlReport(const void *data) {
   const ReportData& report_data =
     *static_cast<const ReportData*>(data);
   memcpy(&report_data_, &report_data, sizeof(report_data_));
+  timestamp_ = Runtime.millisAtCycleStart();
+}
+
+uint32_t ConsumerControlReport::Timestamp() const {
+  return timestamp_;
 }
 
 std::vector<uint16_t> ConsumerControlReport::ActiveKeycodes() const {
diff --git a/testing/ConsumerControlReport.h b/testing/ConsumerControlReport.h
index f0243739..61857f72 100644
--- a/testing/ConsumerControlReport.h
+++ b/testing/ConsumerControlReport.h
@@ -33,9 +33,11 @@ class ConsumerControlReport {
 
   ConsumerControlReport(const void *data);
 
+  uint32_t Timestamp() const;
   std::vector<uint16_t> ActiveKeycodes() const;
 
  private:
+  uint32_t timestamp_;
   ReportData report_data_;
 };
 
diff --git a/testing/KeyboardReport.cpp b/testing/KeyboardReport.cpp
index 31e87de3..873dd648 100644
--- a/testing/KeyboardReport.cpp
+++ b/testing/KeyboardReport.cpp
@@ -16,6 +16,9 @@
 
 #include "testing/KeyboardReport.h"
 
+#include "Kaleidoscope.h"
+#include "testing/fix-macros.h"
+
 #include <cstring>
 
 namespace kaleidoscope {
@@ -25,6 +28,11 @@ KeyboardReport::KeyboardReport(const void* data) {
   const ReportData& report_data =
     *static_cast<const ReportData*>(data);
   memcpy(&report_data_, &report_data, sizeof(report_data_));
+  timestamp_ = Runtime.millisAtCycleStart();
+}
+
+uint32_t KeyboardReport::Timestamp() const {
+  return timestamp_;
 }
 
 std::vector<uint8_t> KeyboardReport::ActiveKeycodes() const {
diff --git a/testing/KeyboardReport.h b/testing/KeyboardReport.h
index 3654d6c4..29c41c70 100644
--- a/testing/KeyboardReport.h
+++ b/testing/KeyboardReport.h
@@ -33,11 +33,13 @@ class KeyboardReport {
 
   KeyboardReport(const void* data);
 
+  uint32_t Timestamp() const;
   std::vector<uint8_t> ActiveKeycodes() const;
   std::vector<uint8_t> ActiveModifierKeycodes() const;
   std::vector<uint8_t> ActiveNonModifierKeycodes() const;
 
  private:
+  uint32_t timestamp_;
   ReportData report_data_;
 };
 
diff --git a/testing/SystemControlReport.cpp b/testing/SystemControlReport.cpp
index 9385ad79..0f0a7d9b 100644
--- a/testing/SystemControlReport.cpp
+++ b/testing/SystemControlReport.cpp
@@ -16,6 +16,9 @@
 
 #include "testing/SystemControlReport.h"
 
+#include "Kaleidoscope.h"
+#include "testing/fix-macros.h"
+
 #include <cstring>
 
 namespace kaleidoscope {
@@ -28,6 +31,11 @@ SystemControlReport::SystemControlReport(const void* data) {
   if (report_data_.key != 0) {
     this->push_back(report_data_.key);
   }
+  timestamp_ = Runtime.millisAtCycleStart();
+}
+
+uint32_t SystemControlReport::Timestamp() const {
+  return timestamp_;
 }
 
 uint8_t SystemControlReport::ActiveKeycode() const {
diff --git a/testing/SystemControlReport.h b/testing/SystemControlReport.h
index 56a79a9e..44719abb 100644
--- a/testing/SystemControlReport.h
+++ b/testing/SystemControlReport.h
@@ -33,9 +33,11 @@ class SystemControlReport : public std::vector<uint8_t> {
 
   SystemControlReport(const void* data);
 
+  uint32_t Timestamp() const;
   uint8_t ActiveKeycode() const;
 
  private:
+  uint32_t timestamp_;
   ReportData report_data_;
 };