it was quite long, consisting of a two-part regular expressions. they did mark my first regular expressions test wrong but did not tell me until I finished the second one so I was bound to make mistakes in the second one since I was basing improvements on the marking they provided. the actual interview was good, they were nice and engaging and genuinely wanted to listen to what I was saying. but in the rejection email they said that the regular expressions test was the reason why I did not get the role which put me off a bit as they had marked it wrong firstly and did not tell me, but still overall okay!