diff --git a/webrtc/modules/audio_coding/neteq/tools/audio_sink.cc b/webrtc/modules/audio_coding/neteq/tools/audio_sink.cc
index fb848bdbd9..665dc412bd 100644
--- a/webrtc/modules/audio_coding/neteq/tools/audio_sink.cc
+++ b/webrtc/modules/audio_coding/neteq/tools/audio_sink.cc
@@ -17,5 +17,10 @@ bool AudioSinkFork::WriteArray(const int16_t* audio, size_t num_samples) {
   return left_sink_->WriteArray(audio, num_samples) &&
          right_sink_->WriteArray(audio, num_samples);
 }
+
+bool VoidAudioSink::WriteArray(const int16_t* audio, size_t num_samples) {
+  return true;
+}
+
 }  // namespace test
 }  // namespace webrtc
diff --git a/webrtc/modules/audio_coding/neteq/tools/audio_sink.h b/webrtc/modules/audio_coding/neteq/tools/audio_sink.h
index 8a5479ef26..71b387a89a 100644
--- a/webrtc/modules/audio_coding/neteq/tools/audio_sink.h
+++ b/webrtc/modules/audio_coding/neteq/tools/audio_sink.h
@@ -56,6 +56,16 @@ class AudioSinkFork : public AudioSink {
   RTC_DISALLOW_COPY_AND_ASSIGN(AudioSinkFork);
 };
 
+// An AudioSink implementation that does nothing.
+class VoidAudioSink : public AudioSink {
+ public:
+  VoidAudioSink() = default;
+  bool WriteArray(const int16_t* audio, size_t num_samples) override;
+
+ private:
+  RTC_DISALLOW_COPY_AND_ASSIGN(VoidAudioSink);
+};
+
 }  // namespace test
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_AUDIO_SINK_H_