diff --git a/api/BUILD.gn b/api/BUILD.gn
index 860ac36e91..82dc308d82 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -943,6 +943,7 @@ if (rtc_include_tests) {
     deps = [
       ":callfactory_api",
       ":time_controller",
+      "../call",
       "../call:call_interfaces",
       "../test/time_controller",
     ]
diff --git a/api/test/create_time_controller.cc b/api/test/create_time_controller.cc
index 09682bd279..794f7ccfcc 100644
--- a/api/test/create_time_controller.cc
+++ b/api/test/create_time_controller.cc
@@ -14,6 +14,7 @@
 
 #include "call/call.h"
 #include "test/time_controller/external_time_controller.h"
+#include "test/time_controller/simulated_time_controller.h"
 
 namespace webrtc {
 
@@ -22,6 +23,11 @@ std::unique_ptr<TimeController> CreateTimeController(
   return std::make_unique<ExternalTimeController>(alarm);
 }
 
+std::unique_ptr<TimeController> CreateSimulatedTimeController() {
+  return std::make_unique<GlobalSimulatedTimeController>(
+      Timestamp::seconds(10000));
+}
+
 std::unique_ptr<CallFactoryInterface> CreateTimeControllerBasedCallFactory(
     TimeController* time_controller) {
   class TimeControllerBasedCallFactory : public CallFactoryInterface {
diff --git a/api/test/create_time_controller.h b/api/test/create_time_controller.h
index f4bd3f2c7b..1b6896f2b4 100644
--- a/api/test/create_time_controller.h
+++ b/api/test/create_time_controller.h
@@ -17,9 +17,13 @@
 
 namespace webrtc {
 
+// Creates a time coltroller that wraps |alarm|.
 std::unique_ptr<TimeController> CreateTimeController(
     ControlledAlarmClock* alarm);
 
+// Creates a time controller that runs in simulated time.
+std::unique_ptr<TimeController> CreateSimulatedTimeController();
+
 // This is creates a call factory that creates Call instances that are backed by
 // a time controller.
 std::unique_ptr<CallFactoryInterface> CreateTimeControllerBasedCallFactory(