The evidence of belief is obedience. So what does that make disobedience? The evidence of unbelief. If you claim to believe on and trust in Christ, yet live in disobedience to His Word then you are a liar. The true test of your faith is your obedience to Christ, and His Word.
Titus 1:16 They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate.
James 2
24 Ye see then how that by works a man is justified, and not by faith only.
25 Likewise also was not Rahab the harlot justified by works, when she had received the messengers, and had sent them out another way?
26 For as the body without the spirit is dead, so faith without works is dead also.
1st John 2:4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
Titus 1:16 They profess that they know God; but in works they deny him, being abominable, and disobedient, and unto every good work reprobate.
James 2
24 Ye see then how that by works a man is justified, and not by faith only.
25 Likewise also was not Rahab the harlot justified by works, when she had received the messengers, and had sent them out another way?
26 For as the body without the spirit is dead, so faith without works is dead also.
1st John 2:4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.