Only primary amines give positive carbylamine test.

Both aliphatic and aromatic primary amines on heating with chloroform and alcoholic $\mathrm{KOH}$ gives foul smelling isocyanides which are also known as carbylamines. 

$\mathrm{R}-{\mathrm{NH}}_2+{\mathrm{CHCl}}_3+3\mathrm{KOH}\left(\mathrm{alc}.\right)\stackrel{∆}{\to } \mathrm{R}-\mathrm{N}\equiv \mathrm{C}+3\mathrm{KCl}+3{\mathrm{H}}_2\mathrm{O}$