diff --git a/modules/audio_processing/test/audio_processing_simulator.cc b/modules/audio_processing/test/audio_processing_simulator.cc
index d08de7564e..19d9572e19 100644
--- a/modules/audio_processing/test/audio_processing_simulator.cc
+++ b/modules/audio_processing/test/audio_processing_simulator.cc
@@ -226,6 +226,20 @@ void AudioProcessingSimulator::ProcessStream(bool fixed_interface) {
                                      : analog_mic_level_);
   }
 
+  // Post any scheduled runtime settings.
+  if (settings_.frame_for_sending_capture_output_used_false &&
+      *settings_.frame_for_sending_capture_output_used_false ==
+          static_cast<int>(num_process_stream_calls_)) {
+    ap_->PostRuntimeSetting(
+        AudioProcessing::RuntimeSetting::CreateCaptureOutputUsedSetting(false));
+  }
+  if (settings_.frame_for_sending_capture_output_used_true &&
+      *settings_.frame_for_sending_capture_output_used_true ==
+          static_cast<int>(num_process_stream_calls_)) {
+    ap_->PostRuntimeSetting(
+        AudioProcessing::RuntimeSetting::CreateCaptureOutputUsedSetting(true));
+  }
+
   // Process the current audio frame.
   if (fixed_interface) {
     {
diff --git a/modules/audio_processing/test/audio_processing_simulator.h b/modules/audio_processing/test/audio_processing_simulator.h
index 3418c395d8..f68448b718 100644
--- a/modules/audio_processing/test/audio_processing_simulator.h
+++ b/modules/audio_processing/test/audio_processing_simulator.h
@@ -124,6 +124,8 @@ struct SimulationSettings {
   absl::optional<bool> multi_channel_render;
   absl::optional<bool> multi_channel_capture;
   absl::optional<int> simulated_mic_kind;
+  absl::optional<int> frame_for_sending_capture_output_used_false;
+  absl::optional<int> frame_for_sending_capture_output_used_true;
   bool report_performance = false;
   absl::optional<std::string> performance_report_output_filename;
   bool report_bitexactness = false;
diff --git a/modules/audio_processing/test/audioproc_float_impl.cc b/modules/audio_processing/test/audioproc_float_impl.cc
index 767c93ddd8..c9abd0ad6c 100644
--- a/modules/audio_processing/test/audioproc_float_impl.cc
+++ b/modules/audio_processing/test/audioproc_float_impl.cc
@@ -201,6 +201,16 @@ ABSL_FLAG(int,
           simulated_mic_kind,
           kParameterNotSpecifiedValue,
           "Specify which microphone kind to use for microphone simulation");
+ABSL_FLAG(int,
+          frame_for_sending_capture_output_used_false,
+          kParameterNotSpecifiedValue,
+          "Capture frame index for sending a runtime setting for that the "
+          "capture output is not used.");
+ABSL_FLAG(int,
+          frame_for_sending_capture_output_used_true,
+          kParameterNotSpecifiedValue,
+          "Capture frame index for sending a runtime setting for that the "
+          "capture output is used.");
 ABSL_FLAG(bool, performance_report, false, "Report the APM performance ");
 ABSL_FLAG(std::string,
           performance_report_output_file,
@@ -451,6 +461,12 @@ SimulationSettings CreateSettings() {
   settings.simulate_mic_gain = absl::GetFlag(FLAGS_simulate_mic_gain);
   SetSettingIfSpecified(absl::GetFlag(FLAGS_simulated_mic_kind),
                         &settings.simulated_mic_kind);
+  SetSettingIfSpecified(
+      absl::GetFlag(FLAGS_frame_for_sending_capture_output_used_false),
+      &settings.frame_for_sending_capture_output_used_false);
+  SetSettingIfSpecified(
+      absl::GetFlag(FLAGS_frame_for_sending_capture_output_used_true),
+      &settings.frame_for_sending_capture_output_used_true);
   settings.report_performance = absl::GetFlag(FLAGS_performance_report);
   SetSettingIfSpecified(absl::GetFlag(FLAGS_performance_report_output_file),
                         &settings.performance_report_output_filename);