Background process is initialized at server start and when trying to run the tests i get the following error.
$ make installcheck
(using postmaster on Unix socket, default port)
============== dropping database "contrib_regression" ==============
ERROR: DROP DATABASE cannot be executed from a function or multi-command string
command failed: "/postgres/install/bin/psql" -X -c "DROP DATABASE IF EXISTS \"contrib_regression\"" "postgres"
make: *** [installcheck] Error 2
