bluez-test-scripts software package provides BlueZ test scripts, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install bluez-test-scripts
bluez-test-scripts is installed in your system.
Make ensure the bluez-test-scripts package were installed using the commands given below,
$ sudo dpkg-query -l | grep bluez-test-scripts *
You will get with bluez-test-scripts package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | bluez-test-scripts |
| Version | 5.23-2 |
| Description | BlueZ test scripts |
| Sub Section | admin |