love.cfg

function love.conf(t)
  t.name = "Example project -- tests"
  t.author = "ToxicFrog"
  t.identity = "example.test"
  t.version = "0.9.0" -- replace with target love2d version

  t.console = true -- enable console on windows for debug logging

  -- disable all module loading
  -- if some of your tests actually call love2d API functions, either enable them or provide stubs
  for name in pairs(t.modules) do
    t.modules[name] = false
  end
end

main.lua

-- entry point for the tests
EXPORT_ASSERT_TO_GLOBALS=true
require "luaunit"

TestFoo = {}

function TestFoo:example()
  assertEquals(1, 1)
  assertNotEquals(1, 2)
end

os.exit( LuaUnit.new():runSuite() )