flatpak-tests software package provides Application deployment framework for desktop apps (tests), 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 flatpak-tests
flatpak-tests is installed in your system.
Make ensure the flatpak-tests package were installed using the commands given below,
$ sudo dpkg-query -l | grep flatpak-tests *
You will get with flatpak-tests package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Miscellaneous |
| Package | flatpak-tests |
| Version | 0.6.13-1 |
| Description | Application deployment framework for desktop apps (tests) |
| Sub Section | Miscellaneous |