This is the list of all Testament shows I have seen. Click on the link to see some pictures, the set list (if available) and a review.
March 29 1998 – Bogotá, Colombia – Velódromo de Bogotá
June 6 2004 – Bologna, Italy – Arena Parco Nord - Gods Of Metal Festival
May 9 2005 – Paris, France – La Locomotive
June 5 2008 – Sölvesborg, Sweden – Sweden Rock Festival
June 27 2008 – Dessel, Belgium – Graspop Metal Meeting Festival
February 28 - Stockholm, Sweden - Globen (with Megadeth and Judas Priest)
August 1 2009 - Wacken, Germany - Wacken Open Air
I discovered Testament a long time ago with the "Practice What You Preach" Album.
It's one of my favourite thrash metal bands. They have kept their unique style over the years, even if all their albums are different and they've have many line up changes since the 90's.