bluetooth_test: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/lib/plainbox-providers-1/checkbox/bin/bluetooth_test - from package: plainbox-provider-checkbox

You may install the required package with command apt-get install {package}

Error in other languages:
bluetooth_test: bevel nie gevind nie
bluetooth_test: comandă negăsită
bluetooth_test: comando não encontrado
bluetooth_test: commande introuvable
bluetooth_test: command not found
bluetooth_test: käsku ei ole
bluetooth_test: không tìm thấy lệnh
bluetooth_test: komanda nerasta
bluetooth_test: Kommando nicht gefunden.
bluetooth_test: kommandot finns inte
bluetooth_test: komut yok
bluetooth_test: nie znaleziono polecenia
bluetooth_test: níor aimsíodh an t-ordú
bluetooth_test: no se encontró la orden
bluetooth_test: no s'ha trobat l'ordre
bluetooth_test: opdracht niet gevonden
bluetooth_test: parancs nem található
bluetooth_test: perintah tidak ditemukan
bluetooth_test: príkaz nenájdený
bluetooth_test: příkaz nenalezen
bluetooth_test: команда не найдена
bluetooth_test: командата не е открита
bluetooth_test: 命令找不到
bluetooth_test: コマンドが見つかりません