@BeforeInjecting
 public void copyTestFiles() throws IOException {
   dataFolder = temporaryFolder.newFolder();
   File playerFolder =
       new File(dataFolder, FileUtils.makePath("playerdata", SAMPLE_UUID.toString()));
   if (!playerFolder.mkdirs()) {
     throw new IllegalStateException("Cannot create '" + playerFolder.getAbsolutePath() + "'");
   }
   Files.copy(
       TestHelper.getJarPath(FileUtils.makePath(SOURCE_FOLDER, "sample-folder", "data.json")),
       new File(playerFolder, "data.json").toPath());
 }