message: Passes package IDs through to cargo.
diff: @@ -193,6 +193,10 @@ fn init_args(test_cmd: &mut Command, config: &Config) {
  if config.release {
  test_cmd.arg("--release");
  }
  + config.packages.iter().for_each(|package| {
  + test_cmd.arg("--package");
  + test_cmd.arg(package);
  + });
  if let Some(target) = config.target.as_ref() {
  test_cmd.args(&["--target", target]);
  }
  