for {
		for _, name := range []string{"testdata", "go.mod", "go.sum"} {
			hostPath := filepath.Join(dir, name)
			if _, err := os.Stat(hostPath); err != nil {
				continue
			}
			devicePath := path.Join(deviceCwd, dir)
			if err := adb("exec-out", "mkdir", "-p", devicePath); err != nil {
				return err
			}
			if err := adb("push", hostPath, devicePath); err != nil {
				return err
			}
		}
		if subdir == "." {