For testing, pro file should look like this (Qt Creator generates that):
QT += testlib
QT -= gui
TARGET = tst_sometest
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += tst_funytest.cpp
DEFINES += SRCDIR=\\\"$$PWD/\\\"
In general CONFIG contains files (*.prf) names (without extensions) located at <qt location>/mkspecs/features/ . Content of those files is "included" to the project.