enableAlias := true
	opts = append(opts, func(conf *Config) { conf.EnableAlias = enableAlias })
	testFilesImpl(t, filenames, srcs, colDelta, manual, opts...)
	if !manual {
		enableAlias = false
		testFilesImpl(t, filenames, srcs, colDelta, manual, opts...)
	}
}

func testFilesImpl(t *testing.T, filenames []string, srcs [][]byte, colDelta uint, manual bool, opts ...func(*Config)) {
	if len(filenames) == 0 {

	// Alias types are enabled by default
	testFilesImpl(t, filenames, srcs, manual, opts...)
	if !manual {
		t.Setenv("GODEBUG", "gotypesalias=0")
		testFilesImpl(t, filenames, srcs, manual, opts...)
	}
}

func testFilesImpl(t *testing.T, filenames []string, srcs [][]byte, manual bool, opts ...func(*Config)) {
	if len(filenames) == 0 {