diff --git a/src/main/java/org/elasticsearch/common/bytes/ByteBufferBytesReference.java b/src/test/java/org/elasticsearch/common/bytes/ByteBufferBytesReference.java
similarity index 99%
rename from src/main/java/org/elasticsearch/common/bytes/ByteBufferBytesReference.java
rename to src/test/java/org/elasticsearch/common/bytes/ByteBufferBytesReference.java
index 2859dc7fe0b..ad289d6678a 100644
--- a/src/main/java/org/elasticsearch/common/bytes/ByteBufferBytesReference.java
+++ b/src/test/java/org/elasticsearch/common/bytes/ByteBufferBytesReference.java
@@ -38,6 +38,7 @@ import java.nio.charset.CharsetDecoder;
 import java.nio.charset.CoderResult;
 
 /**
+ * Note: this is only used by one lone test method.
  */
 public class ByteBufferBytesReference implements BytesReference {