diff --git a/test/src/main/java/org/jvnet/hudson/test/HudsonTestCase.java b/test/src/main/java/org/jvnet/hudson/test/HudsonTestCase.java
index febeea7fb52d..008f0f080fd1 100644
--- a/test/src/main/java/org/jvnet/hudson/test/HudsonTestCase.java
+++ b/test/src/main/java/org/jvnet/hudson/test/HudsonTestCase.java
@@ -506,11 +506,6 @@ protected ServletContext createWebServer() throws Exception {
         context.setConfigurations(new Configuration[]{new WebXmlConfiguration(), new NoListenerConfiguration()});
         server.setHandler(context);
         context.setMimeTypes(MIME_TYPES);
-        if(Functions.isWindows()) {
-            // this is only needed on Windows because of the file
-            // locking issue as described in JENKINS-12647
-            context.setCopyWebDir(true);
-        }
 
         SocketConnector connector = new SocketConnector();
         connector.setHeaderBufferSize(12*1024); // use a bigger buffer as Stapler traces can get pretty large on deeply nested URL