My friend told me in the lab at school: „if the lesson keeps taking so much time we need to pray here.“ Then we laughed. Then I said: „if necessary I’ll do Adhan here.“Then we laughed. Is this kufr? I didn’t intend making fun of the religion at all.

Ustadh AbdulAziz al-Haqqan
In no way shape or form is this kufr, please dont give in to waswas baraka Allahu feekum.