Constant TEST_INVALID_TEMPLATE_JSON 

pub const TEST_INVALID_TEMPLATE_JSON: &str = r#"{
    "reg_modifiers":  [
        {
            "addr": "0x0AAC",
            "bitmap": "0b1xx1"
        }
    ]
}"#;

Test CPU template in JSON format but has an invalid field for the architecture. “reg_modifiers” is the field name for the registers for aarch64“