Testament’s work ranges from spoken word poetry, playwrighting and composition, to essay writing, live beatbox show to radio presenting. Testament's poetry has been published in several anthologies and has been used a teaching resource in the UK and in over 25 countries around the world. He is also a international workshop facilitator, founding workshop company Hip-Hop Clinic in 2014 producing workshops in venues that range from schools, universities and stadiums, to prisons and park benches. Work as a poet coach includes BBC Radio 1, BBC 1xtra, The Roundhouse and Apples & Snakes. He has given talks for several unversities and two of his plays are studied at degree level.

Testament was also a judge for The BBC Young Writers' Award with First Story & Cambridge University in 2019 and a judge for the Alfred Bradley Award for Audio Drama in 2023.

Testament will also read at 3.30pm in the Grainstore.