{reader4, "us-east-1", targetList1, true},
		{reader3, "", targetList2, false},
		{reader2, "us-east-1", targetList2, false},
	}

	for i, testCase := range testCases {
		if _, err := testCase.reader.Seek(0, 0); err != nil {
			panic(err)
		}
		_, err := ParseConfig(testCase.reader, testCase.region, testCase.targetList)
		expectErr := (err != nil)

		if expectErr != testCase.expectErr {