Is refraining from lying after the age of eleven considered evidence of Islam or disbelief?

What transpired from you was an act of disobedience to Allah the Almighty, and you have repented and sought forgiveness from Allah for it. Allah the Almighty is Forgiving and Merciful. Allah the Almighty says: "And those who do not invoke with Allah another deity or kill the soul which Allah has forbidden, except by right, and do not commit unlawful sexual intercourse. And whoever does that will meet a penalty. Punishment will be doubled for him on the Day of Resurrection, and he will abide therein humiliated. Except for those who repent, believe and do righteous deeds; for them Allah will change their evil deeds into good ones. And ever is Allah Forgiving and Merciful. And he who repents and does righteousness will return to Allah with [accepted] repentance." And when a servant repents from a sin, he should increase in acts of obedience that counteract that sin. What counteracts lying is truthfulness, and moistening the tongue with the remembrance of Allah and the recitation of the Quran.