diff --git a/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/BaseMediaChunkOutput.java b/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/BaseMediaChunkOutput.java
index 9531aaf32e..2154400c9e 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/BaseMediaChunkOutput.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/source/chunk/BaseMediaChunkOutput.java
@@ -15,16 +15,16 @@
  */
 package com.google.android.exoplayer2.source.chunk;
 
+import android.support.annotation.VisibleForTesting;
 import android.util.Log;
 import com.google.android.exoplayer2.extractor.DummyTrackOutput;
 import com.google.android.exoplayer2.extractor.TrackOutput;
 import com.google.android.exoplayer2.source.SampleQueue;
 import com.google.android.exoplayer2.source.chunk.ChunkExtractorWrapper.TrackOutputProvider;
 
-/**
- * An output for {@link BaseMediaChunk}s.
- */
-/* package */ final class BaseMediaChunkOutput implements TrackOutputProvider {
+/** An output for {@link BaseMediaChunk}s. */
+@VisibleForTesting(otherwise = VisibleForTesting.PACKAGE_PRIVATE)
+public final class BaseMediaChunkOutput implements TrackOutputProvider {
 
   private static final String TAG = "BaseMediaChunkOutput";