Test Icicles were an English rock band from London, active from 2004 to 2006. The band consisted of Rory Attwell, Dev Hynes and Sam Mehran.

Influenced by dance-punk, indie rock and post-hardcore, the band was formed when Hynes and Mehran were both 18. They released one album, For Screening Purposes Only, in 2005. Two of its singles, "Circle. Square. Triangle" and "What's Your Damage", reached the top 40 of the UK singles chart.

Following the band's split, Hynes earned further recognition for his solo project Blood Orange.

Prior to forming the band, Attwell, Hynes and Mehran (all of whom shared vocal and guitar duties) had met each other through mutual friends. The trio's preference for the same nightspots (such as the Afterskool night club, in London) also led to frequent meet-ups. Initially the band formed under the moniker Balls with Ferry Gouw, who shortly after went on to form Semifinalists, effectively in the role Hynes eventually filled. Gouw left the band for an extended trip to Indonesia, at which time Attwell and Mehran recruited Hynes and changed the band name to Test Icicles, the new band name also being a suggestion from Gouw.

All three members of the group were involved in numerous, short-lived musical projects before the forming of Test Icicles.

In February 2006, the band announced they were splitting up.

On 26 April 2006 the band released Dig Your Own Grave, an EP meant as a farewell from the band. It featured a CD with remixes and unreleased tracks, and a DVD with the band's music videos.

After the band split, the individual members continued to stay active, becoming involved in a number of side projects between them.