Yes , You must to test with IEC 60601-1 standard as IEC 60601-1-2 is collatral standard of IEC 60601-1 which fall under Cl. 17. If you test and comply with EMC standard (IEC 60601-1-2) that means you only fulfill the requirement of cl. 17.You need to fulfil all the requirements from cl. 4 cl. 16 also to comply with General safety standard(IEC 60601-1)