I always get this error with my heroku laravel 5 when using the artisan command
$ heroku run php /app/artisan
Running php C:/Users/snowflex/AppData/Local/Programs/Git/app/artisan on elvote... starting, run.2723 (Free)
Running php C:/Users/snowflex/AppData/Local/Programs/Git/app/artisan on elvote... connecting, run.2723 (Free)
Running php C:/Users/snowflex/AppData/Local/Programs/Git/app/artisan on elvote... up, run.2723 (Free)
Could not open input file: C:/Users/snowflex/AppData/Local/Programs/Git/app/artisan