diff --git a/plugins/mapper/attachments/src/test/java/org/elasticsearch/index/mapper/xcontent/SimpleAttachmentMapperTests.java b/plugins/mapper/attachments/src/test/java/org/elasticsearch/index/mapper/xcontent/SimpleAttachmentMapperTests.java
index 0516536bc31..f646673e5e5 100644
--- a/plugins/mapper/attachments/src/test/java/org/elasticsearch/index/mapper/xcontent/SimpleAttachmentMapperTests.java
+++ b/plugins/mapper/attachments/src/test/java/org/elasticsearch/index/mapper/xcontent/SimpleAttachmentMapperTests.java
@@ -55,6 +55,7 @@ public class SimpleAttachmentMapperTests {
 
         Document doc = docMapper.parse(json).rootDoc();
 
+        assertThat(doc.get(docMapper.mappers().smartName("file.content_type").mapper().names().indexName()), equalTo("application/xhtml+xml"));
         assertThat(doc.get(docMapper.mappers().smartName("file.title").mapper().names().indexName()), equalTo("XHTML test document"));
         assertThat(doc.get(docMapper.mappers().smartName("file").mapper().names().indexName()), containsString("This document tests the ability of Apache Tika to extract content"));
 
@@ -66,6 +67,7 @@ public class SimpleAttachmentMapperTests {
 
         doc = docMapper.parse(json).rootDoc();
 
+        assertThat(doc.get(docMapper.mappers().smartName("file.content_type").mapper().names().indexName()), equalTo("application/xhtml+xml"));
         assertThat(doc.get(docMapper.mappers().smartName("file.title").mapper().names().indexName()), equalTo("XHTML test document"));
         assertThat(doc.get(docMapper.mappers().smartName("file").mapper().names().indexName()), containsString("This document tests the ability of Apache Tika to extract content"));
     }