@Test
	public void branchInstrInvalidFormatSKZ() { //Tests SKZ won't accept fields
		try { 
			instr = new BranchInstr(Opcode.SKZ, 70);
		}
		catch (IllegalStateException e) {
			System.out.println(e.getMessage());
		}
		assertNull(instr); //Instruction should not be instantiated with invalid arguments
	}