diff --git a/library/extractor/src/test/java/com/google/android/exoplayer2/util/NalUnitUtilTest.java b/library/extractor/src/test/java/com/google/android/exoplayer2/util/NalUnitUtilTest.java
index 483f70fd96..ed5a62f7c5 100644
--- a/library/extractor/src/test/java/com/google/android/exoplayer2/util/NalUnitUtilTest.java
+++ b/library/extractor/src/test/java/com/google/android/exoplayer2/util/NalUnitUtilTest.java
@@ -134,6 +134,7 @@ public final class NalUnitUtilTest {
     assertThat(data.pixelWidthHeightRatio).isEqualTo(1.0f);
     assertThat(data.picOrderCountType).isEqualTo(0);
     assertThat(data.separateColorPlaneFlag).isFalse();
+    assertThat(data.maxNumRefFrames).isEqualTo(4);
   }
 
   @Test