diff --git a/source/java/org/alfresco/repo/model/filefolder/FileFolderPerformanceTester.java b/source/java/org/alfresco/repo/model/filefolder/FileFolderPerformanceTester.java
index 438f860277..747df43694 100644
--- a/source/java/org/alfresco/repo/model/filefolder/FileFolderPerformanceTester.java
+++ b/source/java/org/alfresco/repo/model/filefolder/FileFolderPerformanceTester.java
@@ -242,6 +242,8 @@ public class FileFolderPerformanceTester extends TestCase
                                     NodeRef nodeRef = fileInfo.getNodeRef();
                                     // write the content
                                     ContentWriter writer = fileFolderService.getWriter(nodeRef);
+                                    writer.setEncoding("UTF-8");
+                                    writer.setMimetype(MimetypeMap.MIMETYPE_TEXT_PLAIN);
                                     writer.putContent(dataFile);
                                 }
                                 // done