WordPress Theme Unit Test data failed to import

[ Moderator note: moved to Fixing WordPress. Please do not use Developing With WordPress for these topics. ]

I Downloaded the xml file from this link (https://wpcom-themes.svn.automattic.com/demo/theme-unit-test-data.xml) and try to import in my wordpress (which installed in localhost) but it’s give me this error “Failed to import author . Their posts will be attributed to the current user.” when importing and import only the the title of page and post.