diff --git a/lucene/core/src/test/org/apache/lucene/TestDemoDocValue.java b/lucene/core/src/test/org/apache/lucene/TestDemoDocValue.java
index 1049daaa93a..3c8a0eb31d8 100644
--- a/lucene/core/src/test/org/apache/lucene/TestDemoDocValue.java
+++ b/lucene/core/src/test/org/apache/lucene/TestDemoDocValue.java
@@ -123,6 +123,48 @@ public class TestDemoDocValue extends LuceneTestCase {
     ireader.close();
     directory.close();
   }
+  
+  public void testTwoDocumentsMerged() throws IOException {
+    Analyzer analyzer = new MockAnalyzer(random());
+
+    // Store the index in memory:
+    Directory directory = newDirectory();
+    // To store an index on disk, use this instead:
+    // Directory directory = FSDirectory.open(new File("/tmp/testindex"));
+    // we don't use RandomIndexWriter because it might add more docvalues than we expect !!!!1
+    IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
+    iwc.setMergePolicy(newLogMergePolicy());
+    IndexWriter iwriter = new IndexWriter(directory, iwc);
+    Document doc = new Document();
+    doc.add(newField("id", "0", StringField.TYPE_STORED));
+    doc.add(new PackedLongDocValuesField("dv", 1));
+    iwriter.addDocument(doc);
+    iwriter.commit();
+    doc = new Document();
+    doc.add(newField("id", "1", StringField.TYPE_STORED));
+    doc.add(new PackedLongDocValuesField("dv", 3));
+    iwriter.addDocument(doc);
+    iwriter.forceMerge(1);
+    iwriter.close();
+    
+    // Now search the index:
+    IndexReader ireader = DirectoryReader.open(directory); // read-only=true
+    assert ireader.leaves().size() == 1;
+    DocValues dv = ireader.leaves().get(0).reader().docValues("dv");
+    for(int i=0;i<2;i++) {
+      StoredDocument doc2 = ireader.leaves().get(0).reader().document(i);
+      long expected;
+      if (doc2.get("id").equals("0")) {
+        expected = 1;
+      } else {
+        expected = 3;
+      }
+      assertEquals(expected, dv.getSource().getInt(i));
+    }
+
+    ireader.close();
+    directory.close();
+  }
 
   public void testBigRange() throws IOException {
     Analyzer analyzer = new MockAnalyzer(random());
@@ -198,6 +240,48 @@ public class TestDemoDocValue extends LuceneTestCase {
     ireader.close();
     directory.close();
   }
+  
+  public void testBytesTwoDocumentsMerged() throws IOException {
+    Analyzer analyzer = new MockAnalyzer(random());
+
+    // Store the index in memory:
+    Directory directory = newDirectory();
+    // To store an index on disk, use this instead:
+    // Directory directory = FSDirectory.open(new File("/tmp/testindex"));
+    // we don't use RandomIndexWriter because it might add more docvalues than we expect !!!!1
+    IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, analyzer);
+    iwc.setMergePolicy(newLogMergePolicy());
+    IndexWriter iwriter = new IndexWriter(directory, iwc);
+    Document doc = new Document();
+    doc.add(newField("id", "0", StringField.TYPE_STORED));
+    doc.add(new StraightBytesDocValuesField("dv", new BytesRef("hello world 1")));
+    iwriter.addDocument(doc);
+    iwriter.commit();
+    doc = new Document();
+    doc.add(newField("id", "1", StringField.TYPE_STORED));
+    doc.add(new StraightBytesDocValuesField("dv", new BytesRef("hello world 2")));
+    iwriter.addDocument(doc);
+    iwriter.forceMerge(1);
+    iwriter.close();
+    
+    // Now search the index:
+    IndexReader ireader = DirectoryReader.open(directory); // read-only=true
+    assert ireader.leaves().size() == 1;
+    DocValues dv = ireader.leaves().get(0).reader().docValues("dv");
+    for(int i=0;i<2;i++) {
+      StoredDocument doc2 = ireader.leaves().get(0).reader().document(i);
+      String expected;
+      if (doc2.get("id").equals("0")) {
+        expected = "hello world 1";
+      } else {
+        expected = "hello world 2";
+      }
+      assertEquals(expected, dv.getSource().getBytes(i, new BytesRef()).utf8ToString());
+    }
+
+    ireader.close();
+    directory.close();
+  }
 
   public void testDemoSortedBytes() throws IOException {
     Analyzer analyzer = new MockAnalyzer(random());