Possession of Class A drugs was denied by a 36-year-old man.
Jonathon Locking, of South Parade, Grantham, denies possession of diamorphine – a class A drug – and possession of MCAT – a class B drug.
He is accused of being in possession of less than one gram of each drug.
A trial will be held at Grantham Magistrates’ Court on December 20.
Locking was released on unconditional bail.