From Wikipedia:
The 2002 music video for “The Test” features actress Holly Weston and is directed by Nick Goffey and Dominic Hawley. In the video Weston plays a girl who experiences an array of unusual situations. This includes swimming into a whale, meeting a female cyclops and watching her own body dissipate inbetween shots of being inside a dance club. It is implied that the video is a composite of hallucinations of someone in a club after taking LSD.
“Come with Us”/”The Test” is a double A-side single from The Chemical Brothers’ 2002 album Come with Us. The vocals in “The Test” are performed by Richard Ashcroft (The Verve).
The spoken-word intro from “Come With Us” is sampled from “The Evidence” by Evidence. “The Test” contains a sample from “Pielgrzym” by Polish singer Czesław Niemen, first released in 1972.
